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

[Agathe Porte]

2024-08-27 05:15 CEST, Hui Wang:
> 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(-)

Acked-by: Agathe Porte <agathe.porte at canonical.com>