nüvi 760 slow startup and strange behavior

 

Hi, folks. Just joined POI Factory today. I got a new Garmin nüvi 760 a little over a week ago and really like the device. It's my first GPS unit, and I got it primarily for my wife who gets lost easily in unfamiliar places.

Didn't have any issues with the device until yesterday (Friday, February 13, 2009). We stopped for a bite to eat and got back in the car to continue navigating to where we were going. However, the device didn't startup. It just hung on the "loading maps" screen. So after about 60 seconds I turned it off and back on, and then it came back up as normal, albeit slowly.

The other weird thing is that the voice guidance randomly turned off. After getting home and bringing the device inside, I discovered that the voice had been set to a null value (but neither my wife nor I changed this setting).

So, after resetting the voice value and powering the device on and off a few times, everything seems back to normal. But I guess I'm just wondering if anyone has experienced anything like this with his or her Garmin device. Please let me know!

Thanks!

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One in a While . .

Once in a while mine will appear to hang at Loading Maps when turning on using the battery. I have read in several places that it is defraging the files. If I turn it off and then back on it works normal but I might have to reset the voice again. I don't believe that it has happened while connected to power. If it won't power on, hold the on/off switch to the left for about 10 seconds. It will power back-up. I think that it has happened mostly in the house and it might have something to do with satellite acquisition as well.

--
Looking for a place to go this summer? Try Oshkosh, WI, July 20-26, 2015. The largest gathering of aircraft in the world. http://www.airventure.org/index.html

I feel your pain. I have

I feel your pain. I have used a Nuvi 750 that randomly reset the TTS voice. I think it was connected to the FM transmitter, and each time I used the FM transmitter it reset the voice to null, and I had to reset the voice to the TTS Jane voice.

--
http://www.poi-factory.com/node/21626 - red light cameras do not work

My new 760

does the same thing, sometimes it appears to have hung up while loading. Sometimes the voices disappear. If you go into settings to turn the TTS back on, the file appears to be empty and the blue button you push to select is blank.

My unit has other similar, odd behavior when running on the AC power cord: It appears to hang up while loading, but if you slide the power switch a 2nd time, you immediately get to the normal screen asking "where to".

Sometimes the boot up delay is very long, other times it's very brief, much briefer than my 360. It's unpredictable.

I am making an attempt to stop routing before I turn the unit off so as to minimize processor cycles when powering off.

The problem isn't severe enough for me to complain to Garmin about it - - it'd be my luck they send me a refurb'd unit with other problems. Better the devil you know, they say!

--
(2) Nuvi 1450LMT + 3597LMTHD + 2557LMT + DS61LMT-S Boston MA

Welcome to the site, it is

Welcome to the site, it is great to have you join us.

Miss POI

it's well known and has been documented in many threads

The TTS voice going away if you turn the unit off while it has the loading maps screen up is well known and has been documented in many threads. It is defraging the unit and if you want to avoid the map loading delay as much as possible cancel the current route in the unit before you turn it off or just wait for the loading maps screen to go away on its own when you turn it on.

I turned mine off one time while it was in the map loading screen and learned very quickly that the voice is lost when you do that.

--
GM Built-in Navigation system - Samsung S6 Edge+ Smartphone with Garmin Viago, Google Maps & HERE Apps

My Nuvi 780 has the same problem.

rjrsw wrote:

The TTS voice going away if you turn the unit off while it has the loading maps screen up is well known and has been documented in many threads. It is defraging the unit and if you want to avoid the map loading delay as much as possible cancel the current route in the unit before you turn it off or just wait for the loading maps screen to go away on its own when you turn it on.

I turned mine off one time while it was in the map loading screen and learned very quickly that the voice is lost when you do that.

Welcome to POI

My 760 also did this little trick to me once....opon turning off the unit after no voice corrected the problem...hasn't returned since

Strange Behavior

I noticed my 760 acted up on the thirteenth but I thought it was because of the weather conditions more than the operation of the unit.
But, I could be wrong.

--
A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. - Herm Albright

I have a friend with a 760 that lost the sound..

davidm33 wrote:

My 760 also did this little trick to me once....opon turning off the unit after no voice corrected the problem...hasn't returned since

I told him to check the usual, mute button etc... Then I was told the battery was dead, again advised him to charge it with his computer. I later asked if the problem with the battery was solved. He said he hit the side of the 760 with his hand and the voices came back... And the battery was working as well... Maybe the unit needs a good slap once in a while to just to make it shape up.... shock

--
It is terrible to speak well and be wrong. -Sophocles snɥɔnıɥdoɐ aka ʎɹɐƃ

I've had my 760 almost a

I've had my 760 almost a month now. Occasionally it will seem to hand on the "Loading Maps" screen, although I don't know if it is really hanging up, or if it's just taking a long time, because when it's on long enough for me to notice it, I usually turn the unit off and back on. If I turn it off and right back on, it will be at the main menu screen, and if I go to Language in the settings, it will show none loaded. If I turn it off, and leave it for two or three minutes, it will go through the regular start up, the "Loading Maps" screen clears in a "normal" amount of time, no voice is selected on the Language screen, but I can then re-select from my list.

It doesn't happen often, and I don't remember any specific set of circumstances when it happens, it just seems to be a random occurance.

--
The Moose Is Loose! nuvi 760

Leave it alone and let it

Leave it alone and let it finish defragging. Turning it off in the middle screws it up and caused it to lose the voise settings. Do a hard reset, use the search function for reset, and then from now on, let it finish and start on it's own. It's not a random occurance, it's regular.

--
Frank DriveSmart55 37.322760, -79.511267

Wish I had read this before purchasing

After reading all these reported troubles, it makes me wonder if I made a wise decision to buy my nuvi 760 two days ago....

Defrag.....

phranc wrote:

Leave it alone and let it finish defragging.

Just EXACTLY what leads you to believe that a defrag is going on? In a computer with solid state memory, a defrag accomplishes exactly NOTHING useful. In a unit where the operating code files and core database files ONLY change with an update from Garmin, it wouldn't even appear to accomplish anything useful. I give the Garmin programmers more credit than that.

--
Magellan Maestro 4250// MIO C310X

.

I've had both those problems on my 750 many times. I returned it. I got tired or waiting several minutes for the first set of directions when my friend's 260 starts up fast and usually satellite signal by the time the unit fully boots. I ended up buying a 260...so far so good.

--
Eat at Joes.

you guys are making me

you guys are making me nervous. ive never heard of this issue before and it looks like that a lot of people are having the same problem. when i had my 660, the only problem i really had was that for some reason it took awhile for it to find sattelite reception.. but none of these setting changes or the thing restarting... and i thought i was set on 760s-780s as my choice.. geez. it doesnt get easier.

--
A pedestrian is someone who thought there were a couple of gallons left in the tank.

Defrag....

ka1167 wrote:
phranc wrote:

Leave it alone and let it finish defragging.

Just EXACTLY what leads you to believe that a defrag is going on? In a computer with solid state memory, a defrag accomplishes exactly NOTHING useful. In a unit where the operating code files and core database files ONLY change with an update from Garmin, it wouldn't even appear to accomplish anything useful. I give the Garmin programmers more credit than that.

Erm', touch the speed/eta button on the bottom left of the map, on the dashboard that pops up press and hold for about 10 secs on the speedometer in the middle of the dash, hit "Next" three times to get to the fourth screen - and see how many defrags have been performed and when the last one was?

Then phone Garmin and tell them they shouldn't be doing that?

diagnostics screen showing the defrag count and last defrag date

ka1167 wrote:
phranc wrote:

Leave it alone and let it finish defragging.

Just EXACTLY what leads you to believe that a defrag is going on?

I didn't know you had a Garmin unit and were familiar with how they work, it was my understanding that you have a Magellan.

The fact that the Garmin units do a defrag is well documented on a number of different GPS forums.

Here is a screen grab from October of one of my 760's diagnostics screens showing the defrag count and last defrag date.

http://home.comcast.net/~rjrsw2005/327.bmp

--
GM Built-in Navigation system - Samsung S6 Edge+ Smartphone with Garmin Viago, Google Maps & HERE Apps

Let it start up on its own

poishopper wrote:

After reading all these reported troubles, it makes me wonder if I made a wise decision to buy my nuvi 760 two days ago....

Nothing to get worried about. Just let it start up in it's own good time and don't interrupt it. Mine takes a while to start occasionally, but I never lose the voice.

Facts are facts......

rjrsw wrote:

I didn't know you had a Garmin unit and were familiar with how they work, it was my understanding that you have a Magellan.

What brand of GPS I own has no bearing on the discussion. The fact IS that a defrag, in the classic sense, is worthless. Now maybe Garmin has a different definition of "defrag" OR maybe if they get enough complaints, they will decide, in fact, that it is not a good idea.

Does the 760 maybe have a "real" spinning hard drive?

I certainly don't know everything about the internal workings of a Garmin 760.......but then I doubt that you do either! mrgreen

--
Magellan Maestro 4250// MIO C310X

I was just answering the question you had asked

ka1167

If you look back and read my original response I was answering your posted question that you had posted in this thread as follows:

ka1167 wrote:

Just EXACTLY what leads you to believe that a defrag is going on?

I was pointing out that the Garmin units keep track and display that information in their diagnostic screens as to how many times they have run the defrag and the last date they did it. It is well known and has been posted and documented in a number of forum's.

Just because you do not think that a defrag should be done has nothing to do with the fact that it is being done.

--
GM Built-in Navigation system - Samsung S6 Edge+ Smartphone with Garmin Viago, Google Maps & HERE Apps

Yes but....

rjrsw wrote:

ka1167

If you look back and read my original response I was answering your posted question that you had posted in this thread as follows:

And a good answer it was.......except for the "editorial comment" that you chose to include.

--
Magellan Maestro 4250// MIO C310X

.

I've learned to ignore certain members who like to post about GPS units which they have absolutely no clue about.

Memory fragmentation...

ka1167 wrote:

The fact IS that a defrag, in the classic sense, is worthless.

Not necessarily: one of the first serious programs I wrote, was to analyse fragmentation of memory structures. I never got as far as writing the program to do anything about it though wink

(This was on an Operating System called RSX-11M
arrow http://en.wikipedia.org/wiki/RSX-11)

--
------------------------ Phil Hornby, Stockport, England ----------------------               http://GeePeeEx.com - Garmin POI Creation made easy           »      

Nüvi 760 slow startup and strange behavior

bigyosh wrote:

However, the device didn't startup. It just hung on the "loading maps" screen. So after about 60 seconds I turned it off and back on, and then it came back up as normal, albeit slowly.

The other weird thing is that the voice guidance randomly turned off. After getting home and bringing the device inside, I discovered that the voice had been set to a null value (but neither my wife nor I changed this setting).

So, after resetting the voice value and powering the device on and off a few times, everything seems back to normal. But I guess I'm just wondering if anyone has experienced anything like this with his or her Garmin device. Please let me know!

Thanks!

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Hi,

I've had exactly these problems since upgrading to 4.6 (I'm only assuming it's due to that.) But I read, on these boards, that it may be due to not waiting for the system to fully defrag. The last time I turned it off and then on I had waited over 5 minutes.

If it's true that that is what's causing the problem, I wonder why it's never happened on past upgrades.

Wish Garmin could provide some insight.

-hs

similar issue with mine,

similar issue with mine, takes forever to load maps, if i cycle the power button during a map load, it comes up faster, but voices don't work.

How many of you have complained to Garmin ??

Gypsyqueen wrote:

Wish Garmin could provide some insight.

Have you actually asked them ??

Oh, crap, I'm sorry. Forgot that I am not supposed to comment since I don't actually own a Garmin.
(Pretty pathetic attitude I think.)

--
Magellan Maestro 4250// MIO C310X

Nuvi 760 Slow @ start up

Correct me if im wrong. Fresh of the box Nuvi 760 loads nice and fast. Down the line we all install our POI's, Fodors, Etc and so on. Average memory for a NUVI / Total Size 2GB / Free Space 540Mb / Max out internal memory = Slow performance. Just as you maxed out your Hard Drive from your PC what we get slow performance. Defragment / Just to fix bad clusters on a hard drive. Sure my 760 loaded up slow when all the red light camera with the added sound feature etc. Did a test took them all out and just have the orignal files that first came off the box. Loaded up like a champ. The more added features you add in the NUVI internal memory sure youll slow it down. Just my .02 ....

Thanks for all the responses

You all have been busy, and I appreciate the information. I actually have not used the unit since my post, because I don't need it for my day-to-day commute. And my wife hasn't complained of any issues, either.

If things get quirky, I'll be sure to follow some of these suggestions. My guess is a reset and simply letting the thing defrag in its own time will resolve things.

Cheers!

You would have to ask Garmin engineering department why

rjrsw wrote:

ka1167

If you look back and read my original response I was answering your posted question that you had posted in this thread as follows:

ka1167 wrote:

Just EXACTLY what leads you to believe that a defrag is going on?

I was pointing out that the Garmin units keep track and display that information in their diagnostic screens as to how many times they have run the defrag and the last date they did it. It is well known and has been posted and documented in a number of forum's.

Just because you do not think that a defrag should be done has nothing to do with the fact that it is being done.

You should run a defrag routine on your hard drives,but never defrag flash drives or memory. It does nothing other than adding thousands and thousands of writes, each time you do so you shorten its lifespan. Solid state memory include something called "wear levelling" that spreads out the usage, and hence the wear, across the entire device, regardless of how it's used, hence there is no need for defraging.

Why garmin defrags it's memory?? you would have to ask them, and I mean beyond a CS that answers the phone. Flash memory wears out. The more you write, the shorter the lifespan,it's as simple as that.

--
Using Android Based GPS.The above post and my sig reflects my own opinions, expressed for the purpose of informing or inspiring, not commanding. Naturally, you are free to reject or embrace whatever you read.

Defrag????

gpsaccount wrote:
ka1167 wrote:
phranc wrote:

Leave it alone and let it finish defragging.

Just EXACTLY what leads you to believe that a defrag is going on? In a computer with solid state memory, a defrag accomplishes exactly NOTHING useful. In a unit where the operating code files and core database files ONLY change with an update from Garmin, it wouldn't even appear to accomplish anything useful. I give the Garmin programmers more credit than that.

Erm', touch the speed/eta button on the bottom left of the map, on the dashboard that pops up press and hold for about 10 secs on the speedometer in the middle of the dash, hit "Next" three times to get to the fourth screen - and see how many defrags have been performed and when the last one was?

Then phone Garmin and tell them they shouldn't be doing that?

Defrag????

jackj180 wrote:
gpsaccount wrote:
ka1167 wrote:
phranc wrote:

Leave it alone and let it finish defragging.

Just EXACTLY what leads you to believe that a defrag is going on? In a computer with solid state memory, a defrag accomplishes exactly NOTHING useful. In a unit where the operating code files and core database files ONLY change with an update from Garmin, it wouldn't even appear to accomplish anything useful. I give the Garmin programmers more credit than that.

Erm', touch the speed/eta button on the bottom left of the map, on the dashboard that pops up press and hold for about 10 secs on the speedometer in the middle of the dash, hit "Next" three times to get to the fourth screen - and see how many defrags have been performed and when the last one was?

Then phone Garmin and tell them they shouldn't be doing that?

From my Nuvi 750:

Defrag Count - 97
Defrag Date - 04-APR-07

Seems like the last time it did a defrag was almost 2 years ago. I bought it new in May of 2008, I don't know the manufacture date but I doubt it was over a year from my purchase date.

Paging a little further along and we come to Bluetooth Status. Bluetooth is turned off and it is using the internal mic. The 750 doesn't have bluetooth or a mic. It also lists MSN Traffic but it doesn't have a MSN traffic receiver, yet it is enabled.

Can you tell me what a defrag is supposed to do on solid state memory? After all, the data isn't stored in sectors on a platter and it doesn't have a mechanical read/write head to move around. There is no seek delay. In short there is nothing mechanical about the memory. The only reason to defrag a mechanical disk drive is to rearrange the data so that it is in sectors that minimize head movements to speed up access to that data.

Since accessing one area of memory takes just as long as accessing any other area of memory, a defrag would seem to serve no purpose.

Jack j

But Jack......

jackj180 wrote:

Since accessing one area of memory takes just as long as accessing any other area of memory, a defrag would seem to serve no purpose.

The unit SAYS it is defragging.....and someone has postulated that is what is going on when the unit is slow to start up........so why are you argueing with those indisputable facts ?? mrgreen

Never mind that it might be an item left over from YEARS ago when there really were tiny hard drives and the programmers bypassed the code and are just too lazy to remove it completely.

Just because it would be pointless and might, in fact, even shorten the life of the memory, certainly is no reason to think it might not REALLY be happening.

But then, I don't own a Garmin so I obviously know NOTHING. shock

--
Magellan Maestro 4250// MIO C310X

Garmin defrag

I was an IBM mainframe programmer before I retired and I wrote an application that did a kind of defrag periodically. I had two kinds of free memory: a large chunk of Never Used Memory and a collection of Freed Memory blocks. I divided memory up into blocks. When I needed one or more blocks I took them from the Never Used. When I freed blocks, I put them on the Freed block queue. When all free blocks were scattered around on the Freed queue, access was slower. We mainframe guys worry about these things. LOL. Periodically I would run through the Freed queue, which had blocks all over the place, and put the blocks in order on the Never Used queue. This speeded up access. Maybe this is what Garmin means by a defrag.

Plus ça change.....

ka1167 wrote:

But then, I don't own a Garmin so I obviously know NOTHING. shock

Far be it from us mere mortals to disagree with you. BTW didn't your political party die out sometime in the 19th century?

Defrag????

ka1167 wrote:
jackj180 wrote:

Since accessing one area of memory takes just as long as accessing any other area of memory, a defrag would seem to serve no purpose.

The unit SAYS it is defragging.....and someone has postulated that is what is going on when the unit is slow to start up........so why are you argueing with those indisputable facts ?? mrgreen

Never mind that it might be an item left over from YEARS ago when there really were tiny hard drives and the programmers bypassed the code and are just too lazy to remove it completely.

Just because it would be pointless and might, in fact, even shorten the life of the memory, certainly is no reason to think it might not REALLY be happening.

But then, I don't own a Garmin so I obviously know NOTHING. shock

You are right, the unit says it has done 97 defrags and the last one was almost 2 years ago. The unit also says it has MSN Traffic enabled. So it has something enabled that it doesn't have. The unit says that it is using the internal mic on BlueTooth. But it doesn't have BlueTooth or an internal mic.

Given the erroneous info about MSN Traffic and BlueTooth, why would you believe the info about defrags?

Look at it another way, the unit did 97 defrags. Assume it averages 1 defrag per month, my unit must be over 10 years old! But wait, it hasn't done any in almost 2 years. Oh, then it must be around 196 years old.

Ridiculous! Makes more sense to assume that this is some type of log file that was used in development of the OS and not removed from the final version. It could be that, at some time in the past, Garmin had plans to bring out a unit that used a hard drive. In short I don't know why it says it did defrags before it was built. I do know that a defrag of solid state memory is a waste of time.

I think the OP's problem is that his unit has a problem and is hanging up or getting stuck in an endless loop.

Jack j

.

jackj180 wrote:

Assume it averages 1 defrag per month, my unit must be over 10 years old!

But maybe it only happens when required? - and not to any pre-determined time schedule.

He also wrote:

I do know that a defrag of solid state memory is a waste of time.

I have no idea of the detail, behind what Garmin describes as a 'defrag'. But there are other reasons to 'defrag' memory structures, other than for performance reasons.

Maybe there's some free list, from which small blocks of memory are allocated (say for doing Proximity Alert lookaheads). Perhaps bigger blocks are allocated for some other task (such as recording the Track Log). Depending on how these are released after use, you could end up with a free list comprised of lots of small blocks and not enough big ones. At this point, some functions can no longer be performed.

The above scenario is completely made-up, but hopefully it illustrates some of the issues that might be encountered.

--
------------------------ Phil Hornby, Stockport, England ----------------------               http://GeePeeEx.com - Garmin POI Creation made easy           »      

Flash Drive Life

BobDee wrote:
rjrsw wrote:

ka1167

You should run a defrag routine on your hard drives,but never defrag flash drives or memory. It does nothing other than adding thousands and thousands of writes, each time you do so you shorten its lifespan. Solid state memory include something called "wear levelling" that spreads out the usage, and hence the wear, across the entire device, regardless of how it's used, hence there is no need for defraging.

Why garmin defrags it's memory?? you would have to ask them, and I mean beyond a CS that answers the phone. Flash memory wears out. The more you write, the shorter the lifespan,it's as simple as that.

When I worked for a defense company we used flash memory for missile software and only reprogrammed it 10 times before it was replaced. Either the memory has gotten better or military requirement are overly conservative. You seldom see anything about errors in flash memory over time but at some time it wears out.

Defen$e Department?

BobDee wrote:

When I worked for a defense company we used flash memory for missile software and only reprogrammed it 10 times before it was replaced. Either the memory has gotten better or military requirement are overly conservative. You seldom see anything about errors in flash memory over time but at some time it wears out.

After they were pulled from service, they were destroyed by pounding on them with $250 hammers and then flushed the bits down toilets with $500 seats. grin

Defragging memory

Phil said "Maybe there's some free list, from which small blocks of memory are allocated (say for doing Proximity Alert lookaheads). Perhaps bigger blocks are allocated for some other task (such as recording the Track Log). Depending on how these are released after use, you could end up with a free list comprised of lots of small blocks and not enough big ones. At this point, some functions can no longer be performed."

Exactly. At the start, all unused memory is in one big block (Available Memory). Functions take small blocks off Available as needed. When finished with the blocks they put them on the Free chain. Eventually all unused memory is on the Free chain in variously sized blocks. Scanning the Free chain for the right sized block is inefficient. Defrag puts the memory back into Available.

Give us a message

phranc wrote:

Leave it alone and let it finish defragging.

It would nice if Garman could add a message to display on the screen "Defragging -Please wait"

But that might be too easy.

--
Wanted -Woman with GPS -send picture of GPS

Well, probably not

jfcaramagno wrote:

Scanning the Free chain for the right sized block is inefficient. Defrag puts the memory back into Available.

Neither of us knows for sure HOW the Garmin operating system handles it's memory so this whole discussion is just an exercise if futility but......

with solid state memory, there is NO advantage to allocating or keeping lists of different length blocks. You only need ONE list of available memory and it contains the starting address of each block of "standard" size, whatever that might be.

While there might be some TINY loss of efficiency when reading a lot of addresses that are not sequential, that is more than made up for by not having to keep track of various block sizes.

--
Magellan Maestro 4250// MIO C310X

Assume that the Garmin designers are not total idiots

alrom45 wrote:

It would nice if Garman could add a message to display on the screen "Defragging -Please wait"

But that might be too easy.

......and you might conclude that they would do that.....if that was really what was happening.

--
Magellan Maestro 4250// MIO C310X

.

Couldn't the Garmin units be running a weekly memory scan? Magellan units do that.

(Oh wait, I don't own a Magellan. So I have no clue what I'm talking about.)

And Garmin would...

alrom45 wrote:
phranc wrote:

Leave it alone and let it finish defragging.

It would nice if Garman could add a message to display on the screen "Defragging -Please wait"

But that might be too easy.

And Garmin would become the butt of many jokes instantly.

Trying to use your Garmin GPS, you foolish owner, don't you know it's defragging it's solid state memory? Wait a few minutes before it's ready.

/thumbs twirl

If this were a reality, I doubt I'd be owning any of my Garmin. Why is it that my iPods (all flash based) don't have problems with defraggin? And they have a lot more read / writes, especially my iPod touch which I use to browse the web.

Why would Garmin need to defrag when my iPod touch doesn't need to defrag? The iPod touch is a mini-PC essentially, while the Garmin is a very limited device that only reads the map data on it, and uses it to produce a very limited set of instructions.

Garmin would be the laughing stock of the electronic industry if they couldn't resolve this "defrag" thing (and I honestly can't believe that they are really doing defrag). Oh wait, my Palm PDA is defragging too, and my Motorola Razr is defragging - too bad I had to miss that phone call from my boss while my phone was defragging... LOL smile

--
http://www.poi-factory.com/node/21626 - red light cameras do not work

Can you force a defrag

I see by following a post above you can see how many times your garmin has defragged. Mine has done it 4 times in the 3 months I've had it. Is there a way to force it to defrag. Last time it was defragging I turned it off then on again and also had the voice set to blank - had to go in and select it again.

--
Go Leafs Go.... Well, maybe next year ;(

how do you know it was defragging?

t-bone822 wrote:

I see by following a post above you can see how many times your garmin has defragged. Mine has done it 4 times in the 3 months I've had it. Is there a way to force it to defrag. Last time it was defragging I turned it off then on again and also had the voice set to blank - had to go in and select it again.

I'm curious, how do you know for sure it was defragging?

I'm very skeptical that Garmin actually needs to defrag as much as everyone seems to think it needs to. I also am not sure that Garmin is defragging, other than the terminology that it is using.

Compare a Garmin GPS that might be seldom used to an iPod Touch that is used just about every day. My iPod Touch has never needed a defrag, holds Gigs of more data (videos / MP3 player), and operates as a mini-PC (iTunes apps, internet browser, etc). Why would Garmin need a defrag when my iPod touch never needs it or has a problem losing data while turning on / off?

I wish someone from Garmin would help shed light on this. And I fully suspect the losing of the voice is related to software bugs, not to defrag as so many seem to imply. No way no how. Even say I was defragging my Windows hard drive, never does it just all of a sudden make random changes to my Windows configuration. Those who imply that it's a result of the supposed "defrag" causing the loss of the voice setting simply have no good understanding of how defrag works with operating systems.

--
http://www.poi-factory.com/node/21626 - red light cameras do not work

That can't be it..

Rjrolyn wrote:

Correct me if im wrong. Fresh of the box Nuvi 760 loads nice and fast. Down the line we all install our POI's, Fodors, Etc and so on. Average memory for a NUVI / Total Size 2GB / Free Space 540Mb / Max out internal memory = Slow performance. Just as you maxed out your Hard Drive from your PC what we get slow performance. Defragment / Just to fix bad clusters on a hard drive. Sure my 760 loaded up slow when all the red light camera with the added sound feature etc. Did a test took them all out and just have the orignal files that first came off the box. Loaded up like a champ. The more added features you add in the NUVI internal memory sure youll slow it down. Just my .02 ....

...I have all my extra data, custom POI's etc on a 16GB SD card...and I have less than 20 Favorites.

"I'm curious, how do you know for sure it was defragging?"

nuvic320 wrote:
t-bone822 wrote:

I see by following a post above you can see how many times your garmin has defragged. Mine has done it 4 times in the 3 months I've had it. Is there a way to force it to defrag. Last time it was defragging I turned it off then on again and also had the voice set to blank - had to go in and select it again.

I'm curious, how do you know for sure it was defragging?

It isn't the defrag routine that is causing the loss of the selected voice setting it's the turning off the GPS unit while the loading maps screen is still showing and the GPS hasn't finished booting that causes the loss of voice. If you look at the files in the unit after it has completed booting you will see that it has written some new files as it was in the process of booting.

Problems with lost settings, etc. also occur if you just shut off a computer while it is in the middle of a shut down sequence and can even prevent the computer from starting the next time.

If you go to the hidden diagnostics screen after the long map loading has occured you will usually see that a defrag has occured.

The following is a link to a screen shot from the hidden diagnostic screen on my 760 from last October that shows a defrag count of 35 and a last defrag date of October 14th:

http://home.comcast.net/~rjrsw2005/327.bmp

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GM Built-in Navigation system - Samsung S6 Edge+ Smartphone with Garmin Viago, Google Maps & HERE Apps

I doubt it...

rjrsw wrote:

It isn't the defrag routine that is causing the loss of the selected voice setting it's the turning off the GPS unit while the loading maps screen is still showing and the GPS hasn't finished booting that causes the loss of voice. If you look at the files in the unit after it has completed booting you will see that it has written some new files as it was in the process of booting.

Problems with lost settings, etc. also occur if you just shut off a computer while it is in the middle of a shut down sequence and can even prevent the computer from starting the next time.

If you go to the hidden diagnostics screen after the long map loading has occured you will usually see that a defrag has occured.

The following is a link to a screen shot from the hidden diagnostic screen on my 760 from last October:

http://home.comcast.net/~rjrsw2005/327.bmp

Yes I saw your picture yesterday before I posted. But I still doubt it that Garmin is really doing a "defrag". Yes your picture shows that Garmin is using the terminology, but I really doubt that it is the same "defrag" that we're all familiar with.

Like I said, none of my other flashed based devices have anything like defrag, so why is the Garmin device so special that it requires regular defrag? The defrag may be referring to cleaning of memory or something, but we won't know for certain until Garmin sheds light on this.

With regards to shutting down the GPS before it's ready causing these problems, that would be a software/programming error. People regularly shut down iPods, phones, cameras, Xbox, PS3, ninendo DS, Wii, many other electronic devices without having to wait for the device to completely finish doing whatever it's doing. Again, what makes Garmin so special that it requires this special dedicated shut down process?

And with multiple people confirming this problem, are we all so careless to be cutting off power to the Garmin unit and causing it to do the same thing? I seriously doubt it. We all have only one way to shut it down, via the shutdown button. There is no other way to initiate a shut down. Garmin somehow has not built a robust shutdown sequence that apparently prevents problems from occuring. Either that or the software is buggy and will randomly lose the TTS setting. I suspect it's a little of both.

Even with my Windows systems, unless I am in the middle of creating a new file and have not saved that file, I normally will not lose any settings or configuration if I just pull the plug. It's not recommended but it has happened (where I lost power, or Windows froze) and I have never lost data other than open sessions of applications where I was CREATING data, never reading data. Garmin again is not CREATING data, it's just a dumb TTS setting, so why could it get lost during improper shutdown?

It is probably attributed to sloppy Garmin coding, that is causing these problems.

And I have experienced this several times on a Nuvi 750, and I know for sure it was not due to any improver shut down. I had used the GPS to get to my location, and once I arrived, I cancelled the route (it sometimes doesn't cancel if you're not EXACTLY at your destination), so nothing else was running, and then shut it down properly. Garmin showed the "shutting down" screen and then shut itself off. And then I experienced the TTS voice loss. This does not jive with the above explanations of "improper shut down".

So bottom line, folks, is that it is buggy / sloppy Garmin coding, probably causing this. Highly doubtful it's defrag / improper (user action) shutdown that's causing this.

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http://www.poi-factory.com/node/21626 - red light cameras do not work

The loss of voice can be duplicated every time

The loss of voice can be duplicated every time if the operator does a forced shut off of the GPS while the loading maps screen is still up and the startup file write routine has not completed. There are many posts on other forum sites that also document this happening.

The Garmin unit writes these files every time as it completes the booting startup routine:

GarminDevice.xml
sys_log.bin
Current.gpx

It appears if this file write process is not allowed to complete the voice setting is lost the next time it starts. If I was to guess it's the GarminDevice.xml file write routine that causes the loss of voice setting to happen.

The next time your 750 has the prolonged map loading screen try a forced shut off and see what happens.

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GM Built-in Navigation system - Samsung S6 Edge+ Smartphone with Garmin Viago, Google Maps & HERE Apps
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