Created attachment 82706 [details]
dmesg with linus git (3.11-rc1+ pre rc2)

Gnome session fails to login after gdm, the dmesg has the following:
[   31.200220] radeon 0000:01:00.0: couldn't schedule ib

Using mesa, libdrm, xf86-video-ati and xorg from git. Bisected to:
1c01103cb90197900beb534911de558d7a43d0b3 is the first bad commit
commit 1c01103cb90197900beb534911de558d7a43d0b3
Author: Alex Deucher <alexander.deucher@amd.com>
Date:   Fri Jul 12 15:56:02 2013 -0400

    drm/radeon: align VM PTBs (Page Table Blocks) to 32K

    Covers requirements of all current asics.

    Reviewed-by: Christian König <christian.koenig@amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
    Cc: stable@vger.kernel.org

:040000 040000 f3cb7d1cad5194bf1eff03b54be262f95b85e5b3
f6c5f8217aab9f66f23952efff49da3d706cb45e M      drivers