AMD APU - only HDMI works

[Alex Deucher]

On Fri, Dec 30, 2011 at 2:04 PM, Alexander Konotop
<alexander.konotop at gmail.com> wrote:
> Hello to everyone :-)
>
> I have AMD APU with Radeon Sumo graphics. System turns off notebook's
> monitor while loading, but HDMI works. I've tried to turn off and then
> turn on the monitor without success and with such dmesg output:
> ---------------------------------
> [  829.313006] [drm:atom_op_jump]
>  *ERROR* atombios stuck in loop for more than 5secs aborting
> [  829.313013] [drm:atom_execute_table_locked]
>  *ERROR* atombios stuck executing E3E6 (len 2585, WS 4, PS 4) @ 0xEAD0
> [  829.338095] [drm:radeon_dp_link_train_cr]
>  *ERROR* clock recovery reached max voltage
> [  829.338098] [drm:radeon_dp_link_train_cr]
>  *ERROR* clock recovery failed
> ---------------------------------
>
> Now I'm working with radeon.modeset=0 (using vesa driver, as I
> understood).
>
> I'm not the only one who has this problem - here's another example:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/825777
>
> dmesg and xorg logs are attached to this letter.
>
> Is it a kernel radeon module bug or some kind of misconfiguration or
> smth else? BTW it's definitely not an xorg issue because monitor turns
> off even when I'm not using X.

Make sure your kernel has this patch:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commit;h=cf2aff6eff251b6fbdaf8c253e65ff7c693de8cd

Alex


>
> Best regards
> Alexander
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