https://bugs.freedesktop.org/show_bug.cgi?id=66963
--- Comment #136 from Alex Deucher agd5f@yahoo.com --- (In reply to comment #135)
Created attachment 86825 [details] dmesg when under works due to setting .debug=1
I tried again with the latest rc3 build and it still doesn't work; I had left changes from comment 94 intact. Trying to get more information I tried booting with radeon.modeset=0 radeon.debug=1. Once I re-loaded the module with dpm, now it works! So it works correctly if you set it to debug mode, otherwise I can't get any logs of the event.
There is no radeon.debug parameter: [ 34.991462] radeon: unknown parameter 'debug' ignored
Seems like you just got lucky this time. Does it work reliably if you disable radeon and boot into a non-X runlevel, then manually load radeon? E.g., boot with: radeon.modeset=0 1 on the kernel command line in grub to boot into single user mode. then at the command prompt: modprobe -r radeon modprobe radeon modeset=1 dpm=1
This is the dmesg from when it worked (with debug on). I noticed there are some HDMI errors; I only have DVI actually hooked up.
You can ignore those.