BT keeps shutting off with new rom; anyone else?

[2kmy477]

Originally Posted by Donatom3

Sorry it was in HKLM/software/microsoft/bluetooth/sys

So far One hour my phone has been connecting and disconnecting with my bluetooth devices as it should.

The reason I didn't see the Scan Mode was cuz I was looking in HKLM and not HKCU

Btw I just checked and my Scan mode in HKCU/software/microsoft/bluetooth/settings is set to 7. I never changed it.

I'm actually going to try setting it to 0 as I found that this is what 0 means "Determines the default scan mode for the Bluetooth adapter. The default value is 0x3 and ensures inquiry mode and page scan mode are enabled."

from here http://msdn2.microsoft.com/en-us/library/ms884944.aspx

Oh btw when I changed my setting in HKLM/software/microsoft/bluetooth/sys/DisableAutoSuspend to 0 from 1 it has solved the D pad problem completely. I'll continue to monitor my system the way it is set now, but I think this may fix the bluetooth problem and the dpad problem making this rom good again.

It seemed your method solved my BT disconect problem for me so far,(5 hrs now,no disconnects)thanks a lot for the find.

[dtndvm]

Originally Posted by Big D5

Bluetooth is the most important part of my PPC phone if that doesn't work correctly we have problems. This in mind the new AKU is virtually unusable from a bluetooth stand point so curious to find out what the difference was I flashed back to the old AKU this morning and recorded all the registry settings I could find. Than I flashed back to the new AKU the only setting that I could find different is the scan mode, I changed that and have had my Motorola H9 connected for over an hour now with no problems in or out of the portable charger. Here is what I changed:

HKCU/software/Microsoft/Bluetooth/Settings:
Scan Mode from 0-5

Check it out and let me know if this is working for others/devices

Made your reg change and so far so good. I had to restart Bluetooth 3 times in 15 minutes earlier today. Mogul was able to stay connected coming out of sleep mode and incoming text messages since the reg edit. Had to soft reset after the reg edit to see its effects. Thanks Big D5!!!!! I'll let you know if it continues to work. Bluetooth = Motorola H700

EDIT: Had to reestablish connection after BT device went into power saving mode but at least the Bluetooth did not shut itself off on Mogul. Reset the Scan Mode to 0 and made the change from Donatom3 in post above (HKLM/software/microsoft/bluetooth/sys/DisableAutoSuspend to 0 from 1) and Bluetooth has been connected for 2 hours with no problems! Thanks for the info.

[dtndvm]

Originally Posted by 2kmy477

It seemed your method solved my BT disconect problem for me so far,(5 hrs now,no disconnects)thanks a lot for the find.

2kmy477, what were your values for the two reg keys before and after your edits?

[2kmy477]

Originally Posted by dtndvm

2kmy477, what were your values for the two reg keys before and after your edits?

HKLM/software/microsoft/bluetooth/sys

Changed from 1 to 0.I really solved my BT diconnect problem,I'm very happy now.

The "Scan Mode" change did not work for me at all.

[Sonny486]

Looks like ScanMode is set by the CommManger to set the mode of the radio.. If you go and turn off the BlueTooth and refresh the registry value it changes to 0. If you go and turn bluetooth back on, it sets back to 5.
Looks like DisableAutoSuspend is the trick. I am using nueRom version and it has the DisableAutoSuspend = 1 already in it.

-Sonny

[Sonny486]

Here is an excerpt from MSDN:
DisableAutoSuspend -

Determines whether or not suspend mode is enabled on the device.

1: AutoSuspend is disabled. If the Bluetooth device is currently connected the stack calls SystemIdleTimerReset periodically to ensure the device does not go to sleep.

0: AutoSuspend is not be disabled by the stack.

[Sonny486]

Curious how many of you are using default comm manager? I just removed mine to see if the scanmode changes when I turn Bluetooth on or off.

-Sonny

[landale]

It does seem to make sense that change to DisableAutoSuspend would solve the bluetooth drop out issues. While it certainly doesn't get to the root of the problem which is related to what goes on with the Mogul when it goes into D3 suspend (sleep) with bluetooth enabled. Essentially this registry change prevents the Mogul from going into D3 suspend when it is currently connected to a bluetooth device thus avoiding the problem. In these situations the dpad would also keep working since its only in D3 suspend that the problem occurs. However if you don't have an active bluetooth connection this change will not stop the device from going into D3 suspend thus causing the dpad to stop working on resume. If we could figure out a way to force the device to only go into D2 suspend (standby) then this should also resolve the dpad issue although it might cause battery life to drop a bit since standby isn't as battery efficient as sleep.

[idiotekniQues]

htc and sprint should hire some people off of these boards, cause not only are they frickin smart as heck, they actually give a shit about making things work right for the end user.

[Sonny486]

If the key scanmode does not help try this one:

[HKEY_LOCAL_MACHINE\Software\Microsoft\Bluetooth\l2 cap]
"ScanModeControl"=dword:00000000

It worked on a E-TEN M600 which had the exact same problem.

Let me know

-Sonny