Bug#499206: xserver-xorg-video-radeon: R580 + EXA = screen flicker

[Zack Weinberg]

On Wed, Sep 17, 2008 at 7:36 AM, Alex Deucher <alexdeucher at gmail.com> wrote:
> On Tue, Sep 16, 2008 at 8:25 PM, Zack Weinberg <zackw at panix.com> wrote:
>>
>> With EXA enabled on a Radeon R580 (or possibly an X1900, ATI's numbering
>> conventions confuse me) I see several sorts of display flicker:
>
> This is very likely related to multiple monitors.  Please try EXA with
> one monitor and see if you still have the same problem.

Attempting to turn one display off with e.g. 'xrandr --output DVI-1
--off' causes both displays to lose signal and the X server to go
catatonic.  It's still running, but all clients hang; strace shows it
receiving and dismissing an endless series of SIGALARMs, and it won't
respond to anything short of kill -9.

zw