[Bug 38554] Hibernate broken when KMS enabled on Radeon Mobility M6 LY

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https://bugs.freedesktop.org/show_bug.cgi?id=38554

--- Comment #3 from manuel.jander@xxxxxxxxx 2012-09-20 18:24:23 UTC ---
Hi,

I own A IBM Thinkpad X31, AFAIK the video controller is the same (ATI RV100 LY
[Mobility Radeon 7000]). Since KMS, I have to disable it in order to be able to
use hibernation (you really want that on a laptop).

- radeon.modeset=0

Everything works, except the text console is garbled. Each character is filled
with vertical lines, and seems to occupy a rectanlge a little bit bigger than
usual.

- radeon.modeset=0 load radeonfb while Xorg is running and active

The text console is OK, because it switches to FrameBuffer, hiding the corrupt
text console. Hibernate works also.

- radeon.modeset=1 thus radeonfb is loaded before Xorg starts

When I try to hibernate either using pm-hibernate or s2disk with any quirk
option I get a black screen and nothing else happens.

I have some driver writing experience, so if somebody can a least give me some
pointers to look at, that would be great.

Linux 3.5.3
Xorg 7.7

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