https://bugs.freedesktop.org/show_bug.cgi?id=86796
--- Comment #8 from nicknnn@gmail.com --- I applied the patch to the mesa https://bugs.freedesktop.org/attachment.cgi?id=106530
And applied https://bugs.freedesktop.org/attachment.cgi?id=98258 to radeon module
no changes. The screen still "chess".