APPLIED[N]: [SRU][N/O][PATCH 0/2] alsa: Headphone and Speaker couldn't output sound intermittently

[Stefan Bader]

On 27.08.24 05:14, Hui Wang wrote:
> BugLink: https://bugs.launchpad.net/bugs/2077690
> 
> The patches are in the linux-next already, it will be in the unstable
> kernel automatically, and the patches will be in stable sooner or
> later, so it will be in the Jammy kernel automatically in the future.
> 
> And our oem project requires the patches to be in the hwe-6.8 ASAP,
> Here I submit the SRU to Noble and Oracular.
> 
> [Impact]
> On a Dell machine, we plug a speaker or headset into the front audio
> port, play sound to the speaker or headset, we get a 1/6 chance that
> the speaker or headset couldn't output sound.
> 
> 
> [Fix]
> pick 2 commits from linux-next
> 
> [Test]
> booting with the patched kernel,
>   1. plug a speaker or headset in the front port
>   2. play sound
>   3. check if we can hear the sound or not
>   4. repeat the step 1 ~ 3 20 times
>   5. there is no failure
> 
> [Where problems could occur]
> The patches change the depop and headset_type_detect routine, so it
> is possible to introduce regression on pop noise and headset detection,
> for realtek codec of alc285 and alc256 family, but the regression
> possibility is very low, we tested the patches on a couple of Dell and
> Lenovo machines, everything worked as well as before.
> 
> 
> Kailang Yang (2):
>    ALSA: hda/realtek - Fixed ALC256 headphone no sound
>    ALSA: hda/realtek - FIxed ALC285 headphone no sound
> 
>   sound/pci/hda/patch_realtek.c | 76 +++++++++++++++++++++++------------
>   1 file changed, 51 insertions(+), 25 deletions(-)
> 

Applied to noble:linux/master-next. Thanks.

-Stefan

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