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. > > -- > Tanu > > https://liberapay.com/tanuk > https://www.patreon.com/tanuk Thanks, Attila -- 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
