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Re: [Xen-devel] Resume not working on 2nd gen Core i5

On Thu, Feb 23, 2012 at 09:18:27AM -0500, Konrad Rzeszutek Wilk wrote:
> On Thu, Feb 23, 2012 at 10:13:56AM +0100, Joanna Rutkowska wrote:
> > Hello,
> > 
> > I've been trying to resolve the issue of my T420s (Core i5 2540M, Intel
> > integrated GPU) freezing at resume from S3 sleep... It seems like a
> > Xen-related problems, as a similar kernel to what we use in Dom0
> > (2.6.38+xenlinux), when run on baremetal shows no signs of problems at
> > suspend/resume. Also I cannot find any problems reported on the internet
> > with people having problems here.
> > 
> > Unfortunately the only COM port on ExpressCard I have, presents itself
> > as a USB device, and so I cannot really debug this issue via console.
> > The /var/log/pm-suspend also doesn't reveal anything useful (after I
> > reboot, that is).
> > 
> > Does anybody have a similar problem on 2nd Gen Core i5? Any advises how
> > to approach debugging it?
> > 
> > I'm running Xen 4.1.1 with some minor patches, and 2.6.38 with xenlinux
> > patches, and the i915 for the graphics. (Unfortunately I cannot just
> > boot the same Dom0 kernel without Xen, as the GRUB complains about
> > executable being unrecognized -- probably some problem with wrong
> > compression algo).
> > 
> > I also tried 3.2.5 pvops kernel for Dom0 (essentially a vanilla kernel)
> > -- in this case it's even worse, as the system hangs at suspend and
> > never enters S3 :/
> Right. You need some patches for that in 
> git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git devel/acpi-s3.v7
> to make that work.

What I meant to say - please try it out with those patches. It might that you
are hitting on one of the Intel bugs of the video adapter that I think
are mostly fixed in the upstream kernel.

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