On Sat, 2018-01-20 at 22:39 +0200, Tőkés Attila wrote: > Hi Tanu, > > On Sat, Jan 20, 2018 at 10:06 PM, Tanu Kaskinen <tanuk@xxxxxx> wrote: > > On Sat, 2018-01-20 at 10:35 +0200, Tőkés Attila wrote: > > > Hi Everyone, > > > > > > I'm trying to use a Bluetooth speaker with Raspberry Pi 3 in HSP mode > > > with PulseAudio. > > > > > > Based on the information I found on the web (blogs / forums / mailing > > > list archives), apparently, HSP does not really works with the > > > Rasberry Pi's built in BCM43438 chip. I didn't found the exact reason > > > yet. Some people suggest it may be a problem with the BCM43438 > > > firmware or with the kernel driver. A2DP, and HSP with USB Bluetooth > > > dongles are reported to be working fine. (The most complete > > > description I found about the problem is: > > > http://youness.net/raspberry-pi/bluetooth-headset-raspberry-pi-3-ad2p-hsp) > > > > > > I think it would be useful to get clear picture about the problem. And > > > maybe we could try to fix it. > > > > > > Does anyone managed to figure out what exactly the problem is? > > > > > > I started investigating the issue, but didn't got any result yet. I > > > didn't had too much experience with the Linux's Bluetooth stack, so > > > some help with the further investigation would be useful. > > > > > > ---- > > > > > > Bellow are some details of my investigation. > > > > > > Hardware: Raspberry Pi 3 + JBL GO! Bluetooth speaker > > > > > > Kernel: raspberrypi 4.14.14-v7 > > > BlueZ: 5.43 > > > PulseAudio: 11.1 > > > > > > Summary: > > > - BCM43438's driver is sucessfuly loaded, it's firmware is uploaded successfully > > > - the Bluetooth speaker gets detected and the pairing / connection works fine > > > - PulseAudio detects the speaker as a card > > > - both the headset_head_unit and a2dp_sink profiles are shown by > > > `pacmd list-cards` and can be set with `pacmd set-card-profile` > > > - with the a2dp_sink profile, the audio playback works fine (tested > > > with `paplay`) > > > - with the headset_head_unit profile, `paplay` gets stuck at start a > > > no audio is played (`parecord` does the same) > > > > > > I started booth BlueZ and PulseAudio in debug mode, but found nothing > > > obviuosly wrong (at least for me :P) in the logs. Also did a HCI dump. > > > > > > Linking the following logs (uploaded to PasteBin; they are too long > > > inline them): > > > - the Blootoothd's log - https://pastebin.com/WC17Ze0r > > > - the PlulseAudio's log - https://pastebin.com/jUjqjuhC > > > - the output of the PA commands - https://pastebin.com/wvRzdTEx > > > - the output of some BL Tools (sdptool / bluetoothctl / hciconfig) - > > > https://pastebin.com/Ax7XYr94 > > > - the HCI dump -https://pastebin.com/zqhqKu57 > > > > > > SCO dump did not managed to get. > > > > > > I executed the following steps: > > > (the steps are marked in the log files too): > > > - start Blootoothd > > > - start PulseAudio > > > - powered on the Bloothooth speaker > > > - tried to play some audio > > > $ pacmd list cards > > > $ pacmd set-card-profile 1 headset_head_unit > > > $ paplay -v -d bluez_sink.78_44_05_4B_4F_FF.headset_head_unit > > > /tmp/h2g2.ogg (gets stuck) > > > $ pacmd set-card-profile 1 a2dp_sink > > > $ paplay -v -d bluez_sink.78_44_05_4B_4F_FF.a2dp_sink /tmp/h2g2.ogg (works) > > > > HSP playback getting stuck is a fairly common problem (affecting > > multiple bluetooth adapters from different vendors). Solutions for the > > problem are known for a few adapters, but not this one. The issue is > > documented here (the "HSP problem: the bluetooth sink and source are > > created, but no audio is being transmitted" section): > > > > https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/Bluetooth/#index8h3 > > > > As you can read there, the underlying problem in the known cases is > > either that firmware is missing or the SCO audio routing is wrong in > > the adapter. Changing the routing requires (at least in the known > > cases) a vendor-specific magic command. I don't know how to figure out > > the correct command. On one Broadcom chip this does the trick: "hcitool > > cmd 0x3F 0x01C 0x01 0x02 0x00 0x01 0x01", but I don't know how likely > > that is to work on a different chip. > > I just sent that HCI command right now and guess what, it worked :). > Both paplay an parecord are working fine with the HSP profile now. Awesome! I'll update the wiki page. -- Tanu https://liberapay.com/tanuk https://www.patreon.com/tanuk -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
