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



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.

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