2010-01-05 19:03:12

by Dave Hansen

Subject: Xorg hangs on >= ~2.6.31 with Intel i915 driver

I've been seeing hangs when X starts up with newer kernels. I sometimes
get a cursor on the screen, sometimes not. I can move the cursor when I
can see it, but I can't switch to a text console. Sysrq works.

I bisected down to this commit:

commit 176616814d700f19914d8509d9f65dec51a6ebf7
Author: Zhenyu Wang <[email protected]>
Date: Mon Jul 27 12:59:57 2009 +0100

http://git.kernel.org/gitweb.cgi?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=176616814d700f19914d8509d9f65dec51a6ebf7

However, backing that commit out of current mainline
(v2.6.33-rc2-302-gc5974b8) doesn't seem to do any good. It didn't back
out cleanly so I did it by hand and could have easily made a mistake in
the process.

Doing this:

http://sr71.net/~dave/linux/xhangs/fix-config.patch

to the config worked around the issue in current mainline, although I'm
not quite sure why.

Some additional debug information is here:

http://sr71.net/~dave/linux/xhangs/

including X logs and dmesg from a bunch of boots.

-- Dave

2010-01-05 19:18:53

by Woodhouse, David

Subject: Re: Xorg hangs on >= ~2.6.31 with Intel i915 driver

On Tue, 2010-01-05 at 19:02 +0000, Dave Hansen wrote:
> I've been seeing hangs when X starts up with newer kernels. I sometimes
> get a cursor on the screen, sometimes not. I can move the cursor when I
> can see it, but I can't switch to a text console. Sysrq works.

http://bugzilla.kernel.org/show_bug.cgi?id=14627 ?

--
David Woodhouse Open Source Technology Centre
[email protected] Intel Corporation