[Bug 54575] [GM45] boot-up broken in kernel 3.4.10 - screen stays blank (bad patch identified)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=54575

--- Comment #19 from Jun Hu <duanshuidao at hotmail.com> ---
junwork:/etc/sysconfig/network # uname -a
Linux junwork 3.4.11-2.16-xen #1 SMP Wed Sep 26 17:05:00 UTC 2012 (259fc87)
x86_64 x86_64 x86_64 GNU/Linux

I applied above two patches, and trid 120 times in init_ring_common function,
add kernel parameter "drm.debug=6", but still encoutered this issue 2-3 times
per day ; 

messages info ,please see above file.
patch file , please see below .

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