A patch referencing this bug report has been merged in Linux v3.2-rc1:
commit 01e718ec194e30b3e8eb3858c742c13649757efc Author: Alex Deucher <email address hidden> Date: Tue Nov 1 14:14:18 2011 -0400
drm/radeon/kms: Add MSI quirk for Dell RS690
A patch referencing this bug report has been merged in Linux v3.2-rc1:
commit 01e718ec194e30b 3e8eb3858c742c1 3649757efc
Author: Alex Deucher <email address hidden>
Date: Tue Nov 1 14:14:18 2011 -0400
drm/radeon/kms: Add MSI quirk for Dell RS690