Re: Resume not working on 2nd gen Core i5

[Joanna Rutkowska <joanna@invisiblethingslab.com>]

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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?

joanna.


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