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RE: [Xen-devel] Host S3

To: 'scorbin' <steve.corbin@xxxxxxxxxxxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] Host S3
From: Kamala Narasimhan <Kamala.Narasimhan@xxxxxxxxxx>
Date: Wed, 1 Jul 2009 16:41:40 -0400
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Thread-topic: [Xen-devel] Host S3
You might want to consider using the XCI build which already takes care of this 
issue.  We have added the necessary user mode quirks plus included relevant 
components you would need along with appropriate emulation library that would 
work with 64-bit hypervisor etc.

Kamala

> -----Original Message-----
> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-devel-
> bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of scorbin
> Sent: Wednesday, July 01, 2009 2:26 PM
> To: xen-devel
> Subject: Re: [Xen-devel] Host S3
> 
> It looks like suspend.sf.net will not work.  The s2ram utility
> requires /proc/sys/kernel/acpi_sleep_flags which does not exist in the
> Xen patched Linux kernel.  It is removed via CONFIG_ACPI_PV_SLEEP.
> 
> So how are people using dom0 suspend/resume?  Any sample scripts/code?
> Simply doing 'echo mem > /sys/power/state' does not restore the
> graphics
> card.  I also tried a script I found on the web that effectively does:
> 
> # dump current data from the video card to the temporary file
> cat /proc/bus/pci/$ID > $TMP_FILE
> 
> # suspend
> echo -n mem > /sys/power/state
> 
> # restore video card data from the temporary file on resume
> cat $TMP_FILE > /proc/bus/pci/$ID
> 
> with the same result that bare Linux works but booting with Xen does
> not
> restore the video card.
> 
> - steve
> 
> On Wed, 2009-07-01 at 13:40 -0400, scorbin wrote:
> > I tried it on a Dell, Lenovo and 2 HPs.  Upon further investigation
> it
> > turns out the systems are resuming but the video card is not
> > re-initialized.  It's strange because I can use the same procedure
> for
> > Linux without Xen and the video resumes properly.
> >
> > Searching the web I found suspend.sf.net.  Is this what people are
> using
> > to do the video restore?
> >
> >
> > On Wed, 2009-07-01 at 20:08 +0300, Tom Rotenberg wrote:
> > > What is the hardware it didn't work for you?
> > >
> > > 2009/7/1 scorbin <steve.corbin@xxxxxxxxxxxxxxxxxxx>
> > >         What is the state of host suspend to ram?  I noticed that
> this
> > >         functionality was put into 3.2 with fixes in 3.3.  I also
> saw
> > >         something
> > >         recently that indicates there might be a separate tree
> where
> > >         suspend/S3
> > >         is being developed/enhanced?
> > >
> > >         I did try Xen3.3/Ubuntu8.04 and did not get host S3 to
> resume
> > >         properly.
> > >         Straight Ubuntu 8.04 suspends/resumes fine.
> > >
> > >
> > >
> > >         _______________________________________________
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> > >         Xen-devel@xxxxxxxxxxxxxxxxxxx
> > >         http://lists.xensource.com/xen-devel
> >
> >
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-devel
> >
> 
> 
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