Bug#607227: xserver-xorg-video-radeon: with kms, screen flickers, without kms xorg eats 100% CPU

Marcos Marado mindboosternoori at gmail.com
Fri Dec 17 14:21:32 PST 2010

Hello again,

2010/12/17 Alex Deucher <alexdeucher at gmail.com>:
> 2010/12/16 Marcos Marado <mindboosternoori at gmail.com>:
>> 2010/12/16 Michel Dänzer <daenzer at debian.org>:
>>> On Mit, 2010-12-15 at 21:29 +0000, Marcos Marado wrote:
>>>> After installing on this machine squeeze from the debian-installer
>>>> beta 2, I noticed that the
>>>> screen sometimes flickers (opening a konsole an maximizing it will
>>>> result in a more frequent flickering).
>>>> Searching about it, I was led to believe that this could be a kms
>>>> problem, so I deactivated it.
>>>> Now the flicker is gone, but the computer is awefully slow, and a top
>>>> shows Xorg eating 100% CPU.
>>> [...]
>>>> [   17.750916] [drm:radeon_do_init_cp] *ERROR* Failed to load firmware!
>>> [...]
>>>> Versions of packages xserver-xorg-video-radeon suggests:
>>>> pn  firmware-linux                <none>     (no description available)
>>> Does installing this package and rebooting help for any of your
>>> problems?
>> Thank you very much for your quick reply. I should have looked into the logs...
>> Installed firmware-linux, and now the 100% CPU issue is gone.
>> Unfortunately, the flickering issue (more often on black screens) is still
>> present with kms, so for now I'm sticking with having it disabled.
> Try booting with radeon.new_pll=0 and/or radeon.disp_priority=2 on the
> kernel command line in grub.

Yup, just did one test: turned modeset on and booted with
radeon.new_pll=0 and the flickering is gone.

Feel free to ask me anything else you think it might be useful.

Best regards,
Marcos Marado

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