ACK: [SRU][J/OEM-5.14][PATCH 0/1] alsa/hda: mute led can't work on the lenovo machine with cs35l41 s-codec

Tim Gardner tim.gardner at
Thu Jun 16 11:29:26 UTC 2022

On 6/16/22 00:36, Hui Wang wrote:
> BugLink:
> The fix is already in the upstream kernel stable-v5.17, no need to
> send this patch to oem-5.17 and unstable kernels.
> [Impact]
> After we apply the cs35l41 s-codec patchset to the oem-5.14 and jammy
> kernels, the mute led can't work anymore.
> [Fix]
> Backport a patch from mainline kernel to fix this regression
> [Test]
> boot the patched kernel, press mute hotkey, the speaker is muted
> and the mute led is on, press the mute hotkey again, the speaker
> is unmuted and the mute led is off.
> [Where problems could occur]
> After merging this patch, it is possible to affect the machines which
> apply the ALC287_FIXUP_CS35L41_I2C_2, but the regression possibility
> is very low since hda_fixup_thinkpad_acpi() could check if the quirk
> is suitable for the running machine. And we did test, all machines
> could work well.
> Hui Wang (1):
>    ALSA: hda/realtek: Fix mute led issue on thinkpad with cs35l41 s-codec
>   sound/pci/hda/patch_realtek.c | 2 ++
>   1 file changed, 2 insertions(+)
Acked-by: Tim Gardner <tim.gardner at>

Tim Gardner
Canonical, Inc

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