Comment 15 for bug 1112898

Carlo,
since 3.5.0-22.34, several MC related patches[0] have landed in the kernel for quantal. Could you please try the latest version available from -updates and see if this is still an issue? Thanks.

[0]
54fce73 drm/radeon: disable the crtcs in mc_stop (evergreen+) (v2)
0dfac2f drm/radeon: properly lock disp in mc_stop/resume for evergreen+
16bf4c2 drm/radeon/evergreen+: wait for the MC to settle after MC blackout
9d49c9d drm/radeon: fix MC blackout on evergreen+