linux-kernel - [Bug 10732] REGRESSION: 2.6.26-rc2-git4: X server failed start on X61s laptop

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Date:	Sat, 17 May 2008 11:41:31 -0400
From:	Theodore Tso <tytso@....edu>
To:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	"Siddha, Suresh B" <suresh.b.siddha@...el.com>,
	bugme-daemon@...zilla.kernel.org
Subject: [Bug 10732] REGRESSION: 2.6.26-rc2-git4: X server failed start on
	X61s laptop

On Sat, May 17, 2008 at 06:21:18AM -0700, Pallipadi, Venkatesh wrote:
> 
> Can you please send the complete dmesg after X failure, with patch here
> and debugpat boot option.
> http://www.ussg.iu.edu/hypermail/linux/kernel/0805.0/2657.html

With debugpat enabled, the resulting dump that landed in
/var/log/messages was something like 1.6 megabytes, so it totally
overflowed the dmesg buffer.

I've created a Bugzilla attachment of the bzip'ed messages excerpt here:

http://bugzilla.kernel.org/attachment.cgi?id=16174&action=view

The patch above was only available in HTML-only mode (and I couldn't
find Ingo's patch on lkml.org, so I had to reconstruct it, and then
forward part it to 2.6.26-rc2-git5).  What I actually used can be
found here:

http://bugzilla.kernel.org/attachment.cgi?id=16173&action=view

I'm not sure this will be helpful for you, but this should be
completely trivial for you to reproduce; just use Ubuntu Gutsy on
Intel Video based laptop, with a 2.6.26-rc2-git4 or more recent
kernel, and watch it fail.  

For me, I'll just locally revert commit 1c12c4cf since otherwise X
becomes more-or-less unsuable.  (Getting used to 1024x768 after using
a 1600x1200 display is one thing; 800x600 is quite another, and the
performance using the VESA driver is quite abysmal.)

						- Ted
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