[Bug 2077690] Re: alsa: Headphone and Speaker couldn't output sound intermittently

Hello, just tested the fix with my HP CW-0009LA laptop. Mint 22, Kernel
6.8.0-48

It has a Realtek ALC295 that the driver had to be blacklisted in order
for the speakers to work.

Checked on the latest Mint 22 kernel changelog that there was a fix for
Realtek ALC.

I am happy to let you know that my speakers work perfectly without the
audio driver being blacklisted.

Thank you all.

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Title:
alsa: Headphone and Speaker couldn't output sound intermittently

Status in HWE Next:
New
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Jammy:
Won't Fix
Status in linux source package in Noble:
Fix Released
Status in linux source package in Oracular:
Fix Released

Bug description:
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.

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