linux-kernel - Re: i915 completely unusable in 2.6.38.x

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Message-Id: <201104260959.53084@rk-nord.at>
Date:	Tue, 26 Apr 2011 09:59:52 +0200
From:	Melchior FRANZ <melchior.franz@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Chris Wilson <chris@...is-wilson.co.uk>, Greg KH <greg@...ah.com>
Subject: Re: i915 completely unusable in 2.6.38.x

I didn't really want to hijack this thread -- just confirm that the i915
driver is/was broken through the whole 2.6.38 series, up to 2.6.38.4.

* Greg KH -- Monday 25 April 2011:
> On Mon, Apr 25, 2011 at 10:10:46PM +0200, Melchior FRANZ wrote:
> > I'm still using 2.6.38-rc8 (with SuSE 11.4/tumbleweed) on this machine
> > (Acer TravelMate 5735Z-452G32Mnss), because that's the last version that
> > supported KMS on my chipset.

> I don't understand, .38 should work as it has the above fix in it,
> right?

[https://bugzilla.kernel.org/show_bug.cgi?id=31522]
Argh, sorry -- I hadn't noticed that someone closed this bug report.
No, this isn't fixed. Exact same symptoms: The notebook's screen 
goes black early in the boot process with KMS. Closing and reopening
the lid doesn't help, contrary to what some people reported. Turning
off KMS kind-of helps: The virtual console is right after that, but
Xorg apparently gets contradicting info about the screen size, so
that parts of the desktop end up outside the screen area.

> Otherwise, what should be done for the .38-stable tree?

I had assumed that the commit that broke it was known, as there hasn't
much been committed between 2.6.38-rc8 and 26.6.38, but I'll bisect
and investigate.

m.
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