[Nouveau] [Bug 75985] [NVC1] HDMI audio device only visible after rescan

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75985

--- Comment #84 from Lukas Wunner <lukas at wunner.de> ---
(In reply to Przemysław Kopa from comment #83)
> This is the output of grep . /sys/bus/pci/devices/0000:01:00.1/power/*:
> 
> /sys/bus/pci/devices/0000:01:00.1/power/control:on

Something has forced the HDA on, hence it doesn't autosuspend.

Does the issue go away if you re-enable runtime suspend? Try:

echo auto > /sys/bus/pci/devices/0000:01:00.1/power/control

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