** Description changed: - This is for tracking purpose. + [Impact] + On the LENOVO AMD renoir machines, there is a digital mic directly connected + to the APU instead of the codec, so there are two separate sound cards in the + system, one is for analogue codec driven by hda driver, the other is for the + dmic driven by ASoC acp driver. + + The current audio stack (pulseaudio + alsa-ucm-conf + alsa-lib) doesn't + support this design yet, it could support all audio devices on the codec + well, but it doesn't support that dmic well. In the gnome-control-center, + the dmic becomes two input devices: analog input and multichannel input, + and users can only record sound from analog input, the multichannel input + can't function at all. Besides this issue, there is another issue, after + users plug an external mic, the external mic can't replace the dmic + automatically, this gives users a bad experience since this behaviour is + different from the other audio designs. + + [Fix for pulseaudio] + we need to backport 3 patches: + 2ae94c141f device-port: queue CARD CHANGE event before update default sink + c8653c13fa alsa: adjust ucm sink/source priority according to ports priority + A patch not merged by upstream: + https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/305 + + [Test Case] + On the AMD renoir machines: + Boot the system with these updated packages (already backported kernel drivers + to focal and oem-5.6 kernels), open the gnome-control-center, we could see + the digital mic in the input device tab, and only one input device. we could + record sound through this dmic, we could play sound through the speaker, plug + a headset, we could see the output device become headphones and the input + device become headset mic, we could play sound to headphone and record sound + from headset mic, plug a hdmi monitor, there is hdmi audio choice, play sound + to hdmi audio, we could hear the sound from the speaker on the monitor. Suspend + and resume, redo the previous steps, all audio devices still work well. + + On other machines: + Boot the system with all updated packages or partial updated packages, check + all input devices and output devices, they worked as the same as before. this + SRU doesn't bring any impact on other machines. + + [Regression Risk] + Low
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1889217 Title: Make digital mic on the AMD renoir machines work under gnome desktop To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-lib/+bug/1889217/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
