[Bug 36003] [Radeon HD 5650 and 5470] Driver crash during recovery boot and in normal boot (Regression from 2.6.38-3 to -4)

Fri May 27 06:56:56 PDT 2011

https://bugs.freedesktop.org/show_bug.cgi?id=36003

--- Comment #16 from Alex Deucher <agd5f at yahoo.com> 2011-05-27 06:56:57 PDT ---
(In reply to comment #15)

> Is this acpi method supposed to be run by the kernel prior to the loading of
> the driver?
> Would a fail in this acpi method call cause the GPU softreset, the discrepancy
> of the VRAM and ultimately the fail during the loading of the driver?
> 
> I can't find any differences between the acpi-calls in the good and bad
> kern.log files but then again I'm not a linux developer and don't really know
> what to look for.

You need to power up the GPU before the driver loads.  If the GPU is not
powered on, you can't detect how much vram it has or initialize the card.

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