Comment # 4 on bug 109085 from Octavio Paez

(In reply to Łukasz Skocz from comment #1)
> Created attachment 142846 [details]
> another dmesg output

Hey Lukasz!

Have you found any solution to this issue?
Does your lspci -v looks similar to mine?
Mine is:
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Juniper XT [Radeon HD 5770] (rev ff) (prog-if ff)
        !!! Unknown header type 7f
        Kernel driver in use: radeon
        Kernel modules: radeon

That Unknown header type 7f gets me thinking it may be a HW or power issue.

Thanks,

Octavio