From: Melchior FRANZ <melchior.franz@gmail.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: Linux 2.6.39-rc5
Date: Fri, 29 Apr 2011 17:58:06 +0200
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Cc: linux-kernel@vger.kernel.org, Takashi Iwai <tiwai@suse.de>,
        Chris Wilson <chris@chris-wilson.co.uk>,
        dri-devel@lists.freedesktop.org
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* Linus Torvalds -- Wednesday 27 April 2011:
> Go forth and test,

Doesn't work on my notebook with i915/KMS. But then again, neither did
2.6.38 or any of its stable releases. The last working version was
2.6.38-rc8. The problem has been reported[1], but the bug got closed
in the wrong assumption that the bug is fixed. I reported that, too.
No reactions to that.

The bug was introduced with commit ba3820ade317ee36e496b9b40d2ec3987dd4aef0
by Takashi Iwai. The result is that when using KMS my notebook's[2] screen
remains dark, because the backlight isn't turned on.

Reverting commit ba3820ade317ee36e496b9b40d2ec3987dd4aef0 makes my
notebook work correctly again as it used to in 2.6.38-rc8 and before.

m.


[1] https://bugzilla.kernel.org/show_bug.cgi?id=31522
[2] Acer TravelMate 5735Z-452G32Mnss, using Intel GM45
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