linux-kernel - RE: [REGRESSION] "ALSA: HDA: Early Forbid of runtime PM" broke my laptop's internal audio

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Date:   Fri, 29 Jan 2021 01:37:01 +0000
From:   "N, Harshapriya" <harshapriya.n@...el.com>
To:     Michael Catanzaro <mcatanzaro@...hat.com>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Vehmanen, Kai" <kai.vehmanen@...el.com>
Subject: RE: [REGRESSION] "ALSA: HDA: Early Forbid of runtime PM" broke my
 laptop's internal audio

> The laptop's speakers produce no sound. Audio from headphones still works
> fine. A quick test is to visit GNOME System Settings -> Sound -> Output,
> select Test, click Front Left or Front Right and notice there is no sound. I
> tested a mainline kernel revision from yesterday
> (5.11-rc5+) and the regression is not yet fixed. I bisected the regression to
> "ALSA: HDA: Early Forbid of runtime PM":
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i
> d=a0645daf16101bb9a6d87598c17e9a8b7bd60ea7

Does reverting just this patch fix the issue you are seeing?

> 
> I created a downstream bug report here, including some bits from dmesg
> that may or may not be relevant in comment #2:
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=1918933
> 
> Audio devices:
> 
> $ lspci | grep -i audio
> 00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core
> Processor HD Audio Controller (rev 06)
> 00:1b.0 Audio device: Intel Corporation 8 Series/C220 Series Chipset High
> Definition Audio Controller (rev 05)
> 
> OS: Fedora 33
> 
> I'm happy to provide any additional required info or test patches if you CC
> me, since I'm not a kernel developer and am not subscribed to these lists.

Can you share the full dmesg and also let us know which codecs are on your system?

> Thanks.
>