Soon i get BT headset and will try to fix.
Normal GPU Freq 200mhz. In Sleep 16mhz.
I can recommend Jabra BT 620s BT stereo headset. I've had mine for over 5 years now, and they still work great
For the BT issue, as far as i can tell, it is something to do with the way that the BT service "profiles" are managed. Possibly starting with service discovery, and not on state transition. BT devices have "profiles" that define their capabilities and the kind of services that they can offer. Most headsets have at least the "A2DP service" (stero Music playback) and "Headset service" (mono audio out + mono microphone in)
For example - Stutter problem workaround (for my headset):
- Turn on BT on Phone
- Turn on Paired (Jabra BT 620s) Headset
- Phone pairs to the headset creating an active "A2DP service" connection and a "Headset service" connection (according to Phone BT settings screen when headset connected)
- Press play on music player, get stutter.
- Power off headset
- Power on headset
- Phone reconnects with only A2DP
- Press play on music player, and plays fine.
There is a similar problem with BT and phone calls.
- Follow stutter problem work around.
- Make or answer phone call - Headset does not work for recording audio, plays stuttering audio. This implies it must have re-connected to the headset service, while *not* disconnecting from the A2DP service, as it does in every BT headset situation i have been in that worked (PC, Old mb526 ROM, Symbian phones etc).
I would say it is a symptom of the same problem when trying to make calls with BT switched on.
My conclusion - There is something wrong in the BT state/event manager. Can possibly be fixed by ensuring A2DP and Headset services are not connected to at the same time.