[Bug 21050] Radeon driver displays nothing on DVI-0, but works fine on DVI-1

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=21050


Jon Hurst <jon.a at hursts.eclipse.co.uk> changed:

           What    |Removed                     |Added
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                 CC|                            |jon.a at hursts.eclipse.co.uk




--- Comment #19 from Jon Hurst <jon.a at hursts.eclipse.co.uk>  2009-04-29 12:30:40 PST ---
I have a similar problem - I can't convince DVI-0 and DVI-1 to work at the same
time with 6.12.2. 6.12.1-r1 (from gentoo - upstream patches included) works
fine.

I startx and the display comes up as expected on DVI-0. I then bring in the
second monitor with:

xrandr --output DVI-0 --left-of DVI-1

On 6.12.1-r1 the second monitor comes up and all is well. On 6.12.2, the second
monitor comes up but the first blanks and switches off. If I now do:

xrandr --output DVI-0 --mode 0x3e

...the first monitor comes up and the second blanks.

xrandr --output DVI-0 --set coherent_mode 0

has the same effect. If I then change the mode on DVI-1, that monitor pops up
and the first blanks again - it doesn't appear to be anything to do with what I
am setting, just the act of setting something that toggles the monitor.


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