https://bugs.freedesktop.org/show_bug.cgi?id=58659
--- Comment #15 from Jerome Glisse glisse@freedesktop.org --- You sure you using the module with the patch ? You rebuilded your initrd and all ?
Other user that pointed to same commit have the issue fixed by this patch. A better version of this patch is also at : http://people.freedesktop.org/~glisse/0001-drm-radeon-exclude-system-placeme...