https://bugs.freedesktop.org/show_bug.cgi?id=27314

--- Comment #43 from Jérémy Lal kapouer@melix.org 2011-05-16 13:47:02 PDT --- It seems the bios that's found when booting in UEFI mode is wrong. Following that patch and procedure : https://bugs.freedesktop.org/show_bug.cgi?id=26891 solves the issue. When the mode is set, the screen displays weird stuff for a moment. I'll investigate drm messages to see what happens.