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Le 09/01/2012 19:47, Blakawk a écrit :
> Le 09/01/2012 18:57, Sebastian Beßler a écrit :
>> On 09.01.2012 12:11, Blakawk wrote:
>>> On 2012-01-09 11:51, Blakawk wrote:
>>>> Hi folks !
>>>> 
>>>> I am facing a problem since a week now when enabling radeon 
>>>> power management following KMS Power Management Options [1].
>>>> I have two radeon HD 9770 on my system in crossfire 
>>>> configuration, but on Linux I only use one of them (the
>>>> first one on the PCI bus).
>>> 
>>> I mistyped the GPU's model name: it is an HD 6770 "Evergreen" 
>>> using JUNIPER firmware.
> 
>> I have a almost identical problem with my radeon card and KMS. If
>> I build radeon not as a module but inside I only see a black
>> screen and the system hangs. Firmware is correctly build into the
>> kernel (I switched from an older radeon card where everything
>> worked so I know what to do) but it does not work.
> 
>> I have to build radeon as a module and load it at startup.
> 
>> In /etc/conf.d/modules I have module_radeon_args="modeset=1" so 
>> that KMS gets loaded.
> 
>> With that setup everything works "just fine" (short of a flicker 
>> when KMS gets started) so I keep it that way for now.
> 
> I'm trying to reproduce the bug using radeon and DRM stuff built as
> a module instead. Did you enabled power management too with the
> following: # echo '(low|mid|high)' >
> /sys/class/drm/card0/device/power_profile
> 
> For me, as soon as I enable this, the system hangs randomly
> (meaning it can hangs right after enabling the feature or several
> hours later).
> 
>> Maybe that works for you too. It is worth a try.

Ok tried with radeon compiled as a module, did not help... Running the
kernel under kgdb did not help either, it seems there is no kernel
panic at all, even NMI watchdog / hung tasks detector is not seeing
anything... I am kind of lost now :( If someone has an idea, I put the
necessary information here [1].

Any help will be greatly appreciated.

[1] http://gentooist.com/~xavier/gentoo/radeon-pwm-hang/

- -- 
YaGB on http://gentooist.com
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