* HDA: HiFi-spk: define 4-channel speaker layout when Bass Speaker is present [not found] <alsa-project/alsa-ucm-conf/pr/838@alsa-project.org> @ 2026-08-24 18:51 ` GitHub pull_request - opened 0 siblings, 0 replies; only message in thread From: GitHub pull_request - opened @ 2026-08-24 18:51 UTC (permalink / raw) To: alsa-devel alsa-project/alsa-ucm-conf pull request #838 was opened from melcheikh: ### Summary Systems with secondary smart amplifiers (such as Lenovo Legion Pro 7i Gen 10 `16IAX10H`, Legion 5i, and various Yoga models with AW88399 / CS35L41 amplifiers) expose a `Bass Speaker Playback Switch` control in ALSA. This PR adds an `If.bass` condition to `ucm2/HDA/HiFi-spk.conf` so that when `Bass Speaker Playback Switch` is present, ALSA UCM defines `PlaybackChannels 4` and channel positions (`FL`, `FR`, `RL`, `RR`). ### Benefits - Automatically routes audio across all 4 speakers (tweeters + woofers) in modern sound servers (PipeWire / PulseAudio). - Eliminates the need for hardcoded machine-by-machine overrides for 4-speaker HDA setups. - Tested on Lenovo Legion Pro 7i Gen 10 (DMI Product `83F5`). Signed-off-by: Martin el Cheikh <martinelcheikh@gmail.com> Request URL : https://github.com/alsa-project/alsa-ucm-conf/pull/838 Patch URL : https://github.com/alsa-project/alsa-ucm-conf/pull/838.patch Repository URL: https://github.com/alsa-project/alsa-ucm-conf ^ permalink raw reply [flat|nested] only message in thread
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2026-08-24 18:51 ` HDA: HiFi-spk: define 4-channel speaker layout when Bass Speaker is present GitHub pull_request - opened
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