GPS Lag with Sprint Nav on Touch Pro

Originally Posted by aceracer24

I know that people have ported or at least tried to port over newer drivers...from what devices I don't know. so far it's not helped or not helped much. I don't think anyone is very clear as to what the problem is exactly although refresh rate has come up and it's related to screen so it very well could be the issue. Is it the GPS chip not refreshing quickly enough or is it the actual screen not refreshing enough.

As you said, same GPS chip but larger screen..the GPS chip was originally designed with a smaller resolution in mind so ... /shrug

iguidance VGA works flawlessly on my girls diamond, but on my TP the lag is unbearable. I thought the diamond and TP has the same GPS chip? if that is true them someone needs to look at the diamonds GPS drivers and get some porting done.

[ScrapMaker]

Originally Posted by mike99

Hello,

Here is just a thought. I am not a PC pro, but here are my observations as well as posts from here and XDA site.

TP uses the same chip set as the older models, such as mogul, tilt ....
There was no lag using previous devices.
The TP GPS position is accurate when stationery or moving slowly.
Lag increases with increasing speed with most apps, including live search, google maps, Sprint TeleNav.
Voice commands are usually very accurate and on time.

The big difference between TP and older devices is the screen. Resolution is much higher, and so it has to process many more pixels.

Could the lag be due to the display delay, not the GPS module.
Can that be solved with better drivers or ported drivers from other devices?

Any thoughts?

Sprint Navigation is still QVGA So you can throw that out right now.

It's something with the GPS driver...

If you guys wanted to test, you could load up a minimal program like GPSToday, or equivalent, and see if there is still lag. I noticed lag in ALL GPS software--telling me that it's the driver and/or chip.

Good luck! I just hope the Pre doesn't suffer from this--but rumor has it that HTC didn't build it, so it might have a really great build quality/low hardware defect rate.... That will be a blessing...

[chocmatic]

I'm using Nav n GO iGo8 and it runs better than my garmin does. There is still a lag, but not as much as with Garmin. If I'm not mistaken if you use a bluetooth gps receiver with the TP there is no lag at all...

[prophetizer]

it's not accurate either, driving downtown chicago, it thinks i'm on a street a block over, so using it is pointless

[inmnbob]

NOw that's crazy because I live downtown and don't have that problem. Just tested it this morning and it found my street fine. I have a 10/16 build date

[prophetizer]

well, when i'm driving down lasalle for instance, it thinks i'm 2 streets west, it prompts me for what street i'm on, i select it, then it shows me off to the side with the red line. very strange. my build date is 10/14 i think

[kyle4269]

I'm about a street behind and 5 MPHs off with Garmin Mobile XT. I've also tried all the tweaks I can find to fix this. Still no luck.

[mike99]

Build date 12/26. Driving downtown Chicago also a block or so behind. Driving on the highway, at least 200-300 feet back. Sprint TeleNav is the worst, worse than google maps.

Here is another question:

I noted on my TP using any GPS program (live search, google maps, Sprint TeleNav), the motion of the car on the map is very jerky and discontinuous. I think this is the main source of the lag. Even on my wife's iphone with google maps, the motion is smooth and continuous, just like on my in car TomTom.

Any one can comment on their experience?

Thanks.

[rudyru01]

Originally Posted by sprintmogulfan

Hello,

I got my Touch Pro yesterday and have to say that I love it!

I am experiencing a bit of a lag when using the Sprint Navigation however. When driving, it shows my location as approaching a street that I have already traveled past.

Anyway to bring it up to speed?

Thanks!

touch pro official rom update plus gps fix this should explain alot

[mike99]

Does anyone know how to change the GPS mode? I was going through registry, but could not find it.

Apparently, there are modes 1, 2 and 4, of which 1 is the most precise but 4 is the quickest to fix.

Thanks.