[Bug 93881] HDMI sometimes muted at boot

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=93881

--- Comment #4 from guillaume-florianx.vidal at intel.com ---
Created attachment 169971
  --> https://bugzilla.kernel.org/attachment.cgi?id=169971&action=edit
dmesg and audio info

Hello,

The steps to reproduce are:
speaker-test -D hw:PCH,3 -l 1 -c 2 -s 1 -t wav        (sound okay)
xrandr --output HDMI1 --off
xrandr --output HDMI1 --auto
speaker-test -D hw:PCH,3 -l 1 -c 2 -s 1 -t wav        (sound okay)
Ubuntu - system settings - Brightness & Lock - Turn Screen off when inactive
for "1 minute"
Wait 1 minute, HDMI turns off, press a key and log in again. 
speaker-test -D hw:PCH,3 -l 1 -c 2 -s 1 -t wav       Try playing audio, no
sound from HDMI or analog.
This issue is not triggered by suspend to freeze or mem.

ELD (not valid + errors in dmesg) and audio codec seems involved. Please see
attached logs for investigations.

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