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Subject: Re: Lenovo S12 2.6.36-rc7 lockup
From: sam <sam.tygier@hep.manchester.ac.uk>
To: Chris Vine <chris@cvine.freeserve.co.uk>
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Date: Tue, 12 Oct 2010 23:22:26 +0100
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On Sun, 2010-10-10 at 16:48 +0100, Chris Vine wrote:
> On Sun, 10 Oct 2010 13:59:12 +0100
> Chris Vine <chris@cvine.freeserve.co.uk> wrote:
> > Hi,
> > 
> > kernel 2.6.36-rc7 completely locks up my Lenovo S12 notebook on
> > boot-up. It happens early enough in boot-up that nothing appears in
> > any of the system log files.  The last message printed to the console
> > is "Using IPI - No Shortcut mode".
> > 
> > The lock up does not occur with kernel 2.6.35.6.  I do not know in
> > what version of 2.6.36-rc this first arose.
> > 
> > The kernel configuration is set out below.
> > 
> > Chris
> [snip]
> 
> On testing now with the earlier 2.6.36-rc6, I see that it is not a
> lock-up but a hang, in that it partly responds to the keyboard.  With
> rc6 boot-up can proceed further than with rc7 (but very slowly) if
> keyboard keys are more or less randomly pressed.  Boot up is never
> completed though with rc6, even though it proceeds further.
> 
> Chris

i have seen similar issue while running with older kernels (2.6.32) on a
S12 (intel GPU version). there is an ubuntu bug
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/643822

the "nolapic_timer" boot flag fixes it for me.

sam