[Nouveau] [Bug 82527] xset dpms force {off, standby, suspend} returns after ~20 seconds (GeForce 8400 GS)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=82527

--- Comment #14 from Jimmie Mayfield <mayfield+bugzilla at sackheads.org> ---
For what it's worth, I see similar behavior with the Nouveau driver on OpenSUSE
13.2 (kernel 3.16.7-24, xf86-video-nouveau-1.0.11-1.3)

My office machine has two displays connected to a GTS450.  Both displays go
into standby mode.  After a short delay -- I haven't measured by hand but the
aforementioned 20-second value sounds about right -- the secondary display
comes out of standby.  Near as I can tell, this behavior only affects the
secondary display.  I can also confirm that the behavior did not occur when
using the proprietary nVidia drivers.

Another data point that may be useful when diagnosing the problem: I'm also
using the nVidia card for audio.  I'm away from the office for a few days but
I'm reasonably confident that both displays are connected via DVI and that my
speakers are connected to the secondary display's audio line-out jack.  Is it
possible that the secondary display's inability to remain in standby mode is
somehow audio-related?

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