I have a Yoga C940, which is the precursor to the 9i. It has the soundbar and two speakers under the body of the laptop. Out of the box the body speakers did't work but there is a special BIOS for the C940 (only) that activates an amplifier for these speakers. I think that the C940 only has two-channel sound, with something (alsa?, pulse?) mixing the five channels down to two and the sound chip distributing sound to the speakers.
When I look at the built-in sound card with alsamixer I see a Bass Speaker double toggle, that may be the result of the special BIOS. This toggle controls the two speakers under the laptop body. The laptop's sound is much better with the body speakers turned on, but I have heard that the sound is even better using the Windows drivers. Is the intent of the shell script to turn on the amplifier for the body speakers? If this is the case it should be possible to ditch the special BIOS, which would be nice. I'm sure that there are users who don't want to run an unofficial BIOS. The C930 has a similar setup. Should this patch fix its speaker problems? It would be nice to get some documentation on the verbs in the shell script and what they do to the sound chip. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1926165 Title: Bass speakers not enabled on Lenovo Yoga 9i Status in alsa-driver package in Ubuntu: Confirmed Bug description: The Lenovo Yoga 9i has two sets of speakers: regular ones and bass speakers. The former work but while latter are detected and show up in alsamixer, they play no sound. Plugging headphones in and out or toggling any of the volume options does not fix the issue. A possibly related issue for a different Yoga version: https://bugzilla.kernel.org/show_bug.cgi?id=205755 ProblemType: Bug DistroRelease: Ubuntu 21.04 Package: alsa-base 1.0.25+dfsg-0ubuntu7 ProcVersionSignature: Ubuntu 5.11.0-16.17-generic 5.11.12 Uname: Linux 5.11.0-16-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu65 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ubuntu 4466 F.... pulseaudio ubuntu 6219 F.... alsamixer /dev/snd/pcmC0D0p: ubuntu 4466 F...m pulseaudio CasperMD5CheckResult: pass CasperVersion: 1.461 CurrentDesktop: ubuntu:GNOME Date: Mon Apr 26 15:10:05 2021 LiveMediaBuild: Ubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420) PackageArchitecture: all ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: alsa-driver Symptom: audio Symptom_AlsaPlaybackTest: ALSA playback test through plughw:sofhdadsp successful Symptom_Card: Tiger Lake-LP Smart Sound Technology Audio Controller - sof-hda-dsp Symptom_Jack: Speaker, Internal Symptom_PulsePlaybackTest: PulseAudio playback test successful Symptom_Type: None of the above Title: [82BG, Realtek ALC287, Speaker, Internal] Playback problem UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/28/2021 dmi.bios.release: 1.40 dmi.bios.vendor: LENOVO dmi.bios.version: EHCN40WW dmi.board.asset.tag: No Asset Tag dmi.board.name: LNVNB161216 dmi.board.vendor: LENOVO dmi.board.version: SDK0J40697WIN dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 31 dmi.chassis.vendor: LENOVO dmi.chassis.version: Yoga 9 14ITL5 dmi.ec.firmware.release: 1.40 dmi.modalias: dmi:bvnLENOVO:bvrEHCN40WW:bd01/28/2021:br1.40:efr1.40:svnLENOVO:pn82BG:pvrYoga914ITL5:rvnLENOVO:rnLNVNB161216:rvrSDK0J40697WIN:cvnLENOVO:ct31:cvrYoga914ITL5: dmi.product.family: Yoga 9 14ITL5 dmi.product.name: 82BG dmi.product.sku: LENOVO_MT_82BG_BU_idea_FM_Yoga 9 14ITL5 dmi.product.version: Yoga 9 14ITL5 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1926165/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
