Bug#783705: xserver-xorg-video-radeon: Weird X wakeup problem since Jessie upgrade

[Julien Cristau]

On Tue, May  5, 2015 at 12:40:54 +0100, Steve McIntyre wrote:

> On Wed, Apr 29, 2015 at 12:45:29PM +0100, Steve McIntyre wrote:
> >
> >In the morning, I turn on the screen and I don't get a display at
> >all. I've wiggled the mouse, hit numlock on the keybard (the numlock
> >led illuminates fine), etc., but no display. I've seen this kind of
> >thing happen in the past on some machines, so I switch to VT1 and back
> >to see if that helps. Still no display at all, either on console or
> >under X. I log in remotely and I can see that the Xorg.0.log file has
> >been updated with mode lines for the monitor, suggesting things have
> >just woken up fine. But still no display.
> 
> Similar problem this morning. I've found that using xrandr to disable
> and re-enable the DisplayPort output I'm using helps - the display
> comes back. Until xrandr segfaults, anyway - see separate bug.
> 
> Something weird in the card state, I guess?
> 
Sounds likely.  If this still happens with linux 4.0, can you report
this upstream at
https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM%2fRadeon
and let us know the bug number?

Thanks,
Julien
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