Re: Resume not working on 2nd gen Core i5

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

On Thu, Feb 23, 2012 at 06:39:29PM +0100, Joanna Rutkowska wrote:
> On 02/23/12 18:31, Konrad Rzeszutek Wilk wrote:
> > 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.
> 
> So, you're saying those (presumed) bugs a fixed only in the pvops, and
> not in xenlinux?

I am saying that they are fixed in 3.x kernels.