Intermittent GPS

[SkizZO]

Hi all, yesterday i've changed the "external gps settings":
COM8 For virtual GPS port and COM 4 as Hardware GPS port, baud 9600.

Today i was using my GPS the first time after the settings descripted before...
The GPS Works, but at regular intervals of 2 sec, then stops for 10 sec (No GPS Found with Tomtom) and works again.....

Now i have 3 questions:
1) Can i solve this WITHOUT an Hard Reset??
2) If i disable the Virtual com port, tomtom DON'T let me choose another COMport (it skips the Comport configuration page) and, when it allows me to select the right port, the COM4 isn't there
3) There are A LOT of comport into "External GPS Settings", some starting with COM..X and others ports named GPD..X ..... What type of ports are??


(Ps: i have already installed tomtom again)

[pedmond]

Did you try to disable AGPS?

[R3PUBL1K]

I have only seen this problem when AGPS is enabled (via advanced config) too

Also the defualt GPS COM ports is 4 and baud rate of 4800 (should be no need to change this) and why mess with external GPS settings when the device has internal GPS?

[felician]

I have same problem on iGO8 with AGPS enabled.

[SkizZO]

You guys are right! The A-GPS was ON (strange, i don't remember i've activated it)

If i play with the external gps app is because i would to share the same com port to 2 gps apps.....

BTW when i set the com4 in Hardware port, reopening the app it disappear.
Now i have Agps disabled, External gps app "void" and tomtom don't let me choose the comport (it switch from baud speed to mainscreen)

[Riel]

Hmm, I had no problem at all using GPS at standard settings for:

Igo
TrackMe
GoogleMaps

at the same time!

[Hornet331]

Hmm, I had no problem at all using GPS at standard settings for:

Igo
TrackMe
GoogleMaps

at the same time!

diamond has disabled agps out of the box. ;)

[krakout]

Hmmm I had no problems the first couple of times I tried iGo when I first got the device. Then I tweaked it, enabled AGPS and all hell broke loose (presumably due to this setting, though not 100% sure since I changed lots of things). Disabled it on my own, trying to back-track, now it's better but I still got problems with GPS lost...

By the way, is there any use setting COM4 to high speeds? Does it reall improve performance?

[smogdragon]

I had the same problem after flashing the actual rom build from HTC club. I am currently sticking to this one (http://forum.xda-developers.com/showthread.php?t=405859) in italian and no problem at all.


P.S.: Just noticed you're from my same city ;)

[SkizZO]

All ok now, i suppose that if we leave blank the GPS port (no HW port) into first COM screen of external gps app, tomtom skip the comport settings screen, and don't allow you to choose another one.

I've Hardresetted my pda yesterday, and i've seen that out of the box, the diamond has COM4 selected by default.

I don't want to change anything now (i have no time in those days to do another Hard reset) BUT, if you have problems regarding the GPS COM Settings screen in tomtom, try to set the COM4 into GPS PORT (not hardware port) of the "External Gps" app.

[jdblanc]

hello everyone

i have the same problem of signal GPS lost and coming back after a few minutes of use (i use IGO 8), then lose again, then back again, and so on.

I installed the new flash rom from HTC eclub, (QMR-RUU_Diamond_HTC_FRA_1.93.406.1_Radio_Signed_Diamon d_52.29.25.12_1.00.25.05_Ship.exe)

Even if i disable the a-gps using advance config, the problem is still there.

Do you think that problem comes from that new HTC ROM ?

Any solutions?

[vibecatalin]

NO... I had the same problem on old ROM very rarely and solved with Quick GPS , I will see if the problem persist on new ROM...

[KevinNash]

I had this disconnecting problem too with Tomtom 7,

now with Bepe 0.98 and radio Radio v1.00.25.07, all is OK, no disconnect at all this morning ( 2 hours of GPS use ).

But I don't know what resolve the problem, Bepe's ROM or the new .07 radio :confused:

[hmh79]

my diamond refuse to accept setting for hardware port and rate......
it always displayed the default (hardware none ,,port 4800)

and always intermittent gps signal...

can u help me?

[pedmond]

my diamond refuse to accept setting for hardware port and rate......
it always displayed the default (hardware none ,,port 4800)

and always intermittent gps signal...

can u help me?

Never mind the setting. Is AGPS disabled?

[hmh79]

yes its disabled...

[pedmond]

A bit strange, mine works perfectly with iGo, it even updates the position (almost) continuously when in pedestrian mode.

Perhaps you could try an auto detect from your GPS program to reset the link. By the way, what soft are you using?

[hmh79]

well im using garmin xt and navigon...garmin display that the program and hardware is com:4

thank u for being patient with me....

[pedmond]

I know Garmin works on the Diamond, so I'm running out of ideas... I remember reading that some VOIP programs screw the GPS. Did you install any such program?

If not, what I would do is back up my contacts and calendar and do a hard reset to see if this solves the problem. A bit painful, but will certainly answer the question whether there is something wrong with your hardware or not.

[hmh79]

well.. i have changed the rom to karmba version, and it works fine for the last 6 hours..
gps functioning well.
may be the fault was in my previous rom (SwiftBL-WWE-Diamond-ROM-v5-5-Lite)


thank you very much for your help

[loumoud]

Problem solved for me:

I have Bepe Rom 0.99dx with radio 1.00.25.BS14.101 and Tomtom 7.910.9185 and I had no problems at all.

Recently I "tried" use my phone in SIP using WM6VOIP and SIPconfigtool, I have read that it could cause problems with GPS, so I picked up the corrected files said to avoid this problem.

I used the GPS very little since but it was working fine.

Yesterday I've been in trouble because of this intermittent gps signal.

I once softreset and it solved the problem, but after turn off tomtom and try to re use it it never work, no matter how many softreset.

I also tried to change of gps receiver in tomtom : it still was able to get intermittent signal from a non existant or connected BT gps receiver ! (or wired nmea)

Then at home I tried to re install the same tomtom over the "old" one : same thing.

Then I search XDA : turn off A-GPS = worked right away, if turn on again = intermittent.

Still I don't uderstand why it worked for weeks before (I never touch the A Gps parameter before...)

Google maps never been a problem.

If I recall well I had a similar intermittent signal in my P3600, solved by re-install or switch from one receiver to another in tomtom...

[band27]

well.. i have changed the rom to karmba version, and it works fine for the last 6 hours..
gps functioning well.
may be the fault was in my previous rom (SwiftBL-WWE-Diamond-ROM-v5-5-Lite)


thank you very much for your help

Yeh, I had issues with GPS signal sometimes with SwiftBL 7.5 but I've switched roms and left the same radio in and it's been quick and responsive.

I'm currently using udK's beta 7.