[Bug 91407] [SNB] switching monitor off and on breaks DP output

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91407

--- Comment #2 from Anton Khirnov <anton at khirnov.net> ---
(In reply to Jani Nikula from comment #1)
> (In reply to Anton Khirnov from comment #0)
> > Doing 'xrandr --output DP2 --off; xrandr --output DP2 --auto' makes it work
> > again, but it has to be done from X, with the monitor switched to DP.
> 
> "has to be done from X"... do you have some userspace running responding to
> hotplug signals from the driver?

Not that I know, unless it's Xorg itself. I don't have any fancy DE, just X
with FVWM.

What I meant by the sentence you quoted is that I usually switch to HDMI (which
is working), enter "sleep 10; xrandr....", then switch to DP and wait for
xrandr to run. Running xrandr while the monitor is switched to HDMI, or when
i'm switched from X to a different VT, won't work.

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