RE: [Xen-devel] Host S3

[Kamala Narasimhan <Kamala.Narasimhan@xxxxxxxxxx>]

You might want to look for enter-s3.sh script.  Since host S3/resume is 
impacted by different components running on the system and since XCI build 
already ensures that the components built by it plays along with host S3, you 
might be better off with XCI build so as not to chase yet another issue you 
might possibly run into that XCI build might have already taken care of...

Kamala

> -----Original Message-----
> From: scorbin [mailto:steve.corbin@xxxxxxxxxxxxxxxxxxx]
> Sent: Wednesday, July 01, 2009 7:04 PM
> To: Kamala Narasimhan
> Cc: xen-devel
> Subject: RE: [Xen-devel] Host S3
> 
> Hi Kamala,
> 
> Thanks for your response. Can you provide some pointers into the XCI
> trees where I can see the related source code changes?
> 
> - steve
> 
> On Wed, 2009-07-01 at 16:41 -0400, Kamala Narasimhan wrote:
> > 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
> > > >
> > >
> > >
> > > _______________________________________________
> > > Xen-devel mailing list
> > > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > > http://lists.xensource.com/xen-devel
> >


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