Re: [PATCH] ALSA: hda: intel: reset link for HP ENVY 27-p014

[Casey Tunturi <casey@samaritansolutions.net>]

On Tue, Sep 1, 2026 at 8:07 AM Takashi Iwai <tiwai@suse.de> wrote:
> Thanks for the patch. But I must say that it's very hackish, and we 
> should
> reconsider to make the changes a bit more generic or cleaner.
> 
> But, first off, could you give more details about your hardware? At 
> best,
> give alsa-info.sh output (run with --no-upload option and attach the 
> output).


Thank you for taking the time to review it!

Oh yes, I think it's cursed. This is a hack.

I submitted it just before leaving my in-laws' place so it wouldn't stay 
isolated to that one machine. It has been running for about four months, 
and it was the only thing I found so far that made the codec enumerate 
and gave my father-in-law working analog audio under Linux.

I don't have the machine in front of me now. I'll have it again just 
short of two weeks. I'll rerun the tests, collect the alsa-info output, 
and work through the reset and PIO questions then.

> Can't the standard snd_hdac_bus_reset_link() work? If not, we may tweak
> there in the standard code instead of open-code here.

I knew I was probably forcing the issue at the wrong layer. I asked 
around on Matrix with a couple of devs and couldn't get the standard 
reset path to work on this hardware.

I'd appreciate any pointers to code or docs I should read. I'd like to 
understand the right fix rather than just keep the workaround.

Casey