[Bug 27470] Dual link DVI mode (2560x1920) on Dell 30" display unusable (distorted screen) on RV770 [Radeon HD 4850]

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=27470

--- Comment #7 from nine at detonation.org 2011-01-06 08:55:17 PST ---
(In reply to comment #6)
> Is this still an issue with a newer version of the kernel or driver?
> If so, does:
> xrandr --output DVI-0 --set coherent 0
> help?

Problem still exists with 2.6.37-rc7. In the meantime I got a new display. It's
a Dell 3008 WFP with same resolution as the other one. This time I do get an
image, but horizontal resolution is exactly half of what it should be. So
instead of 2560x1600 I get 1280x1600 scaled up by the display. Resolutions up
to 1920x1200 work fine. xrandr --output DVI-0 --set coherent 0 did not change
anything.

Please tell me what I can do to solve this or help solving this. This time I
actually own the display and I would very much like to use it's full potential
with free radeon drivers. I have no problem running bleeding edge stuff and am
a programmer myself, so any hint where to get started would be very
appreciated.

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