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Date:   Tue, 21 Apr 2020 15:08:44 -0400
From:   "Alex Xu (Hello71)" <alex_y_xu@yahoo.ca>
Subject: Unrecoverable AER error when resuming from RAM (hda regression in
 5.7-rc2)
To:     alsa-devel@alsa-project.org, Takashi Iwai <tiwai@suse.de>
Cc:     Roy Spliet <nouveau@spliet.org>, linux-kernel@vger.kernel.org,
        linux-pci@vger.kernel.org
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With 5.7-rc2, after resuming from suspend to RAM, I get:

[   55.679382] pcieport 0000:00:03.1: AER: Multiple Uncorrected (Non-Fatal)=
 error received: 0000:00:00.0
[   55.679405] pcieport 0000:00:03.1: AER: PCIe Bus Error: severity=3DUncor=
rected (Non-Fatal), type=3DTransaction Layer, (Requester ID)
[   55.679410] pcieport 0000:00:03.1: AER:   device [1022:1453] error statu=
s/mask=3D00100000/04400000
[   55.679414] pcieport 0000:00:03.1: AER:    [20] UnsupReq               (=
First)
[   55.679417] pcieport 0000:00:03.1: AER:   TLP Header: 40000004 0a0000ff =
fffc0e80 00000000
[   55.679423] amdgpu 0000:0a:00.0: AER: can't recover (no error_detected c=
allback)
[   55.679425] snd_hda_intel 0000:0a:00.1: AER: can't recover (no error_det=
ected callback)
[   55.679455] pcieport 0000:00:03.1: AER: device recovery failed

Then the display freezes and the system basically falls apart (can't=20
even sudo reboot -f, need to use magic sysrq).

I bisected this to "ALSA: hda: Skip controller resume if not needed".=20
Setting snd_hda_intel.power_save=3D0 resolves the issue.

I am using an ASRock B450 Pro4 with Realtek HDA codec:

[    1.009400] snd_hda_intel 0000:0a:00.1: enabling device (0000 -> 0002)
[    1.009425] snd_hda_intel 0000:0a:00.1: Force to non-snoop mode
[    1.009653] snd_hda_intel 0000:0c:00.3: enabling device (0000 -> 0002)
[    1.021452] snd_hda_codec_generic hdaudioC0D0: ignore pin 0x7, too many =
assigned pins
[    1.021461] snd_hda_codec_generic hdaudioC0D0: ignore pin 0x9, too many =
assigned pins
[    1.021471] snd_hda_codec_generic hdaudioC0D0: ignore pin 0xb, too many =
assigned pins
[    1.021480] snd_hda_codec_generic hdaudioC0D0: ignore pin 0xd, too many =
assigned pins
[    1.021482] snd_hda_codec_generic hdaudioC0D0: autoconfig for Generic: l=
ine_outs=3D0 (0x0/0x0/0x0/0x0/0x0) type:line
[    1.021482] snd_hda_codec_generic hdaudioC0D0:    speaker_outs=3D0 (0x0/=
0x0/0x0/0x0/0x0)
[    1.021483] snd_hda_codec_generic hdaudioC0D0:    hp_outs=3D0 (0x0/0x0/0=
x0/0x0/0x0)
[    1.021484] snd_hda_codec_generic hdaudioC0D0:    mono: mono_out=3D0x0
[    1.021484] snd_hda_codec_generic hdaudioC0D0:    dig-out=3D0x3/0x5
[    1.021485] snd_hda_codec_generic hdaudioC0D0:    inputs:
[    1.046053] snd_hda_codec_realtek hdaudioC1D0: autoconfig for ALC892: li=
ne_outs=3D1 (0x14/0x0/0x0/0x0/0x0) type:line
[    1.046054] snd_hda_codec_realtek hdaudioC1D0:    speaker_outs=3D0 (0x0/=
0x0/0x0/0x0/0x0)
[    1.046055] snd_hda_codec_realtek hdaudioC1D0:    hp_outs=3D1 (0x1b/0x0/=
0x0/0x0/0x0)
[    1.046055] snd_hda_codec_realtek hdaudioC1D0:    mono: mono_out=3D0x0
[    1.046056] snd_hda_codec_realtek hdaudioC1D0:    inputs:
[    1.046057] snd_hda_codec_realtek hdaudioC1D0:      Front Mic=3D0x19
[    1.046058] snd_hda_codec_realtek hdaudioC1D0:      Rear Mic=3D0x18
[    1.046058] snd_hda_codec_realtek hdaudioC1D0:      Line=3D0x1a

I also have an ASUS RX 480 graphics card with HDMI audio output.