[Bug 57365] [i945GM regression] kernel 3.7-rc1 onwards. backlight on, screen dark after KMS kicks in during boot

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=57365

--- Comment #4 from Daniel Vetter <daniel at ffwll.ch> ---
Can you please grab the latest intel-gpu-tools
(http://cgit.freedesktop.org/xorg/app/intel-gpu-tools/) and then run the
intel_reg_dumper tool both on a working and a broken kernel?

The bisected commit makes some sense, since after that we drop a bunch of
spurious state-transitions. Could be that those papered over some bugs and now
we can't enable the hw correctly any longer.

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