[Bug 27470] New: 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

           Summary: Dual link DVI mode (2560x1920) on Dell 30" display
                    unusable (distorted screen) on RV770 [Radeon HD 4850]
           Product: xorg
           Version: 7.5
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: nine at detonation.org
         QAContact: xorg-team at lists.x.org


Created an attachment (id=34677)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=34677)
Xorg.0.log

Trying to use a Dell 3007 WFPHC display in it's native mode (2560x1920) leads
to a distorted screen. It's showing about the colors that should be on the
screen but distorted and flickering so nothing is recognizable and the system
unusable. Lower resolutions do work fine, so I think the problem is in the dual
link DVI support. The screen gets distorted as soon as KMS is switching to the
native resolution.

I'm running Linux with:
openSUSE kernel 2.6.34-rc3-7-desktop,
xorg-x11-server-7.5_1.8.0-19.3.x86_64,
xorg-x11-driver-video-7.5.99_20100401-1.2.x86_64,
libdrm-2.4.99_20100402-1.1.x86_64,
Mesa-7.8.99_20100403-1.1.x86_64

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