[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 #17 from nine at detonation.org 2011-02-05 03:46:41 PST ---
I bit the bullet and tested on Windows 7 -> same problem there. So I bought a
Sapphire Radeon HD5670 and had the tech support confirm that this card does
support 2560x1600. But still, using DVI, I get exactly the same problems.
Frustration reached a new peak.

But the upside is: this card supports displayport and with UMS I am finally
able to use full resolution of my display! But KMS does not find the
displayport output and the screen stays blank. And without KMS I get no
acceleration at all and no power management.

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