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

[bugzilla-daemon at freedesktop.org]

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

--- Comment #14 from Alex Deucher <agd5f at yahoo.com> 2011-05-26 05:17:18 PDT ---
(In reply to comment #13)
> On a bad boot however the detected VRAM shown in kern.log is 3584M, which is
> more than the actual amount of "HyperMemory" these graphic cards. The loading
> of the Microcode then crashes:
> [   21.511875] [drm] Loading RV710 Microcode
> [   21.722682] radeon 0000:01:00.0: Wait for MC idle timedout !
> [   21.924181] radeon 0000:01:00.0: Wait for MC idle timedout !
> [   21.927041] radeon 0000:01:00.0: WB enabled
> [   21.973606] BUG: unable to handle kernel paging request at ffffc90405701ffc

It's not the ucode.  It looks like the driver is loading on a gfx card that is
not powered up.  As such the driver is not able to initialize the card. 
There's an acpi method that's required to power up the discrete card.

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