[Bug 1901922] Re: [SRU][Lenovo ThinkPad T14 Gen 1] No sound output device on startup
Launchpad Bug Tracker
1901922 at bugs.launchpad.net
Mon Nov 23 11:26:12 UTC 2020
This bug was fixed in the package alsa-ucm-conf - 1.2.2-1ubuntu0.5
---------------
alsa-ucm-conf (1.2.2-1ubuntu0.5) focal; urgency=medium
* d/p/0001-sof-hda-dsp-add-initial-kcontrol-values.patch
* d/p/0002-sof-hda-dsp-make-the-boot-init-optional-for-all-cont.patch
* d/p/0003-sof-hda-dsp-Set-Master-Playback-Switch-on-in-the-Boo.patch
* d/p/0004-sof-hda-dsp-Increase-the-speaker-output-volume-in-th.patch
Unmute the master playback switch and increase the init output volume,
otherwise, the playback will be muted after freshly install the OS if
the machine uses ucm to configure the audio mixers, and the init playback
output volume is too low after freshly install the OS.
(LP: #1901922)
-- Hui Wang <hui.wang at canonical.com> Mon, 09 Nov 2020 12:06:50 +0800
** Changed in: alsa-ucm-conf (Ubuntu Focal)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1901922
Title:
[SRU][Lenovo ThinkPad T14 Gen 1] No sound output device on startup
Status in ALSA Libraries:
Fix Released
Status in alsa-lib package in Ubuntu:
Fix Released
Status in alsa-ucm-conf package in Ubuntu:
Fix Released
Status in alsa-lib source package in Focal:
Fix Released
Status in alsa-ucm-conf source package in Focal:
Fix Released
Status in alsa-lib source package in Groovy:
Fix Released
Status in alsa-ucm-conf source package in Groovy:
Fix Released
Status in alsa-lib source package in Hirsute:
Fix Released
Status in alsa-ucm-conf source package in Hirsute:
Fix Released
Bug description:
[Impact]
On the machines with AMD Ryzen acp audio design, the audio can't work
anymore after upgrading the libasound2 to ubuntu3(groovy)/ubuntu2.1(
focal), this is a regression on libasound2 for those machines. the AMD
Ryzen acp audio card needs to load ucm to work with pulseaudio, but
this audio card doesn't have an independant ucm for it, it needs to
link to an existing HDA-Intel ucm, the check_empty_configuration() needs
to cover the situation that Linked is true, otherwise it will fail
to load the ucm for the audio card. Even the audio card could load the
ucm, the output is muted and the init output volume is too low if
freshly install the OS on these machines.
[Fix]
Backport 1 alsa-lib patch to fix the failure of loading ucm on AMD
Ryzen acp audio machines. Backport 4 alsa-ucm-conf patches to fix
init mute and init output volume problem.
[Test Case]
Install the updated libasuond2, rm ~/.config/pulse/*; sudo rm -rf
/var/lib/alsa/*; sudo sh -c 'echo b > /proc/sysrq-trigger' and run pacmd
list-cards, we could see the pulseaudio load the ucm successfully and we could see
the sound card is generated and all output and input devices are listed
under sound card, but the init output is muted and the volume is very low
if we manually unumte it. Now install the updated alsa-ucm-conf, rm ~/.config/pulse/*; sudo rm -rf
/var/lib/alsa/*; sudo sh -c 'echo b > /proc/sysrq-trigger', the output is
not muted anymore and the output volume is OK to most users.
[Regression Risk]
This could make the machines with sof audio driver fail to load ucm
, then all audio function can't work as before, like the speaker can't
output sound or the internal mic can't be found or can't record sound.
But this possibility is very low, I tested this SRU on some machines with or
without sof audio driver, all worked as well as before.
After logging in, only a dummy device is available for audio playback (resulting in no audible playback). When running "pactl load-module module-detect" the sound card shows up, and playback works as expected.
If pulseaudio is restarted with "pulseaudio -k" the playback device
disappears again. Running the above command get things working again.
If I change the following section in /etc/pulse/default.pa from:
### Automatically load driver modules depending on the hardware available
.ifexists module-udev-detect.so
load-module module-udev-detect
.else
### Use the static hardware detection module (for systems that lack udev support)
load-module module-detect
.endif
To:
### Automatically load driver modules depending on the hardware available
#.ifexists module-udev-detect.so
#load-module module-udev-detect
#.else
### Use the static hardware detection module (for systems that lack udev support)
load-module module-detect
#.endif
Things start working as they should after running "pulseaudio -k".
ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: pulseaudio 1:13.99.2-1ubuntu1
ProcVersionSignature: Ubuntu 5.8.0-26.27-generic 5.8.14
Uname: Linux 5.8.0-26-generic x86_64
ApportVersion: 2.20.11-0ubuntu50
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: KDE
Date: Wed Oct 28 17:21:02 2020
InstallationDate: Installed on 2020-10-23 (4 days ago)
InstallationMedia: Kubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
SourcePackage: pulseaudio
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/07/2020
dmi.bios.release: 1.9
dmi.bios.vendor: LENOVO
dmi.bios.version: R1BET40W(1.09 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20UDCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.9
dmi.modalias: dmi:bvnLENOVO:bvrR1BET40W(1.09):bd08/07/2020:br1.9:efr1.9:svnLENOVO:pn20UDCTO1WW:pvrThinkPadT14Gen1:rvnLENOVO:rn20UDCTO1WW:rvrNotDefined:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad T14 Gen 1
dmi.product.name: 20UDCTO1WW
dmi.product.sku: LENOVO_MT_20UD_BU_Think_FM_ThinkPad T14 Gen 1
dmi.product.version: ThinkPad T14 Gen 1
dmi.sys.vendor: LENOVO
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