On 30/09/15 11:21, Tanu Kaskinen wrote: > On Wed, 2015-09-30 at 10:20 +0200, Mimmo wrote: >> Arduino Tian (an evolution of Arduino Yun) is a board that has a MIPS >> processor where Linux is runinng. The distribution used is Linino, >> derived from openWRT. >> >> On this board Wifi from Qualcomm and Bluetooth from CSR are embedded. >> >> Software version details: >> - kernel 3.18.11 >> - bluez5 version 5.23 >> - pulseaudio 6.0 >> - dbus 1.9 >> >> The Headset device is properly connected but using paplay: >> >> root at linino:~# paplay -v -d bluez_sink.5D_43_5A_03_31_EA /root/sample.wav >> Opening a playback stream with sample specification 's16be 2ch 44100Hz' >> and channel map 'front-left,front-right'. >> Connection established. >> Stream successfully created. >> Buffer metrics: maxlength=4194304, tlength=352800, prebuf=349276, >> minreq=3528 >> Using sample spec 's16be 2ch 44100Hz', channel map 'front-left,front-right'. >> Connected to device bluez_sink.5D_43_5A_03_31_EA (index: 1, suspended: no). >> >> it start to play the music but without any sound. Trying to change the >> card profile from HSP to A2DP with the command: >> >> pactl set-card-profile 0, a2dp_sink >> >> hangs the board and exit with connection failure: Timeout > Hangs the board? What does that mean? If pactl prints something after > the hang, apparently not the whole board gets hung (unless pactl runs > on a different machine). It means that pactl exit after 10 secs but the pulseaudio process runs at 90-99% of the cpu, and I need to restart the pulseaudio process to continue to use the board. > >> trying to trace the code, I noticed that it stops on the call >> stop_thread on module-bluez5-device.c > How did you trace the code? Can you check with gdb where it's stopping? I used strace to understand what system call did, and then I put so log messages. I'll try using gdb and let you know. >> Can you help me to understand why is hanging changing the profile? >> >> Is it possible to force the default to A2DP instead of HSP? > "pactl set-card-profile" should save the chosen profile so that later > on a2dp would get activated automatically. However, the code hangs > before the new profile preference gets written to the disk... You could > in theory hack the card-database file in ~/.config/pulse, but it's > binary data, so not exactly easy. >
