https://bugs.freedesktop.org/show_bug.cgi?id=66963
--- Comment #97 from Alex Deucher agd5f@yahoo.com --- (In reply to comment #96)
Not so fast fellas. Recently checked 3.11RC7 and DRM-Next (current). The result is the same: it still can't boot with my Radeon HD 2600 XT :(
Can you attach a copy of your vbios?
(as root) (use lspci to get the bus id) cd /sys/bus/pci/devices/<pci bus id> echo 1 > rom cat rom > /tmp/vbios.rom echo 0 > rom
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
If possible, try and do it over ssh from a second machine so you can still access it if you lose the display.