https://bugs.freedesktop.org/show_bug.cgi?id=66963
--- Comment #100 from Alex Deucher agd5f@yahoo.com --- (In reply to comment #99)
Also, can you get a copy of the dmesg output from the driver after it loads? Try booting into a non-X runlevel without loading radeon (either blacklist it, or set radeon.modeset=0 on the kernel command line in grub) and then manually load it. E.g., modprobe -r radeon modprobe radeon modeset=1 dpm=1
I'm sorry I don't understand fully how to do this.
boot with `radeon.modeset=0 1` on the kernel command line in grub, then when the kernel boots to single user mode, reload the radeon module with dpm=1. E.g.,
modprobe -r radeon modprobe radeon modeset=1 dpm=1