Comment # 12
on bug 57567
from Vladimir
I found the exact commit that causes this bug http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-quantal.git;a=commit;h=8f53b5444a25b5be3bfe0164316f9bc7845279c9 drm/radeon: properly handle mc_stop/mc_resume on evergreen+ (v2) BugLink: http://bugs.launchpad.net/bugs/1091251 commit 62444b7462a2b98bc78d68736c03a7c4e66ba7e2 upstream. - Stop the displays from accessing the FB - Block CPU access - Turn off MC client access This should fix issues some users have seen, especially with UEFI, when changing the MC FB location that result in hangs or display corruption. v2: fix crtc enabled check noticed by Luca Tettamanti Signed-off-by: Alex Deucher <alexander.deucher@amd.com> [ herton: adjust context ] Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com> Hope you guys can fix it
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