Still having problems with Suspend-To-Ram an Intel Atom D525

Still having problems with Suspend-To-Ram an Intel Atom D525

[linux-pm.20.masuefke]

Hello,

I still have no success suspending my Intel Atom D525 (with the NM10
chipset) to ram.

Suspend to ram does not work at all, suspend to disk works.

Please see the mailing list thread from 20Dec2011 for a detailed problem 
description:
https://lists.linux-foundation.org/pipermail/linux-pm/2010-December/thread.html#29654
and the screenshots on http://www-users.rwth-aachen.de/martin.suefke/s2ram/

I re-tested now with 2.6.38-rc4 and 2.6.22 (git pulls from Linus 
Torvald's kernel tree) in a desperate attempt to find any working
version, so I could maybe try to pin down the problem by git-bisect.
However, also with 2.6.22 and 2.6.38-rc4 suspend to ram does not work.

The configurations for these kernels were made with 'make oldconfig'
from this configuration:
http://www-users.rwth-aachen.de/martin.suefke/s2ram/Kernel_config_2.6.37-rc6

If anybody has any clue, hint, suggestion or questions regarding the
issue, please drop me a note.

Thank You,
Martin Suefke

Re: Still having problems with Suspend-To-Ram an Intel Atom D525

[Alan Stern]

On Wed, 16 Feb 2011 linux-pm.20.masuefke@spamgourmet.com wrote:

> Hello,
> 
> I still have no success suspending my Intel Atom D525 (with the NM10
> chipset) to ram.
> 
> Suspend to ram does not work at all, suspend to disk works.
> 
> Please see the mailing list thread from 20Dec2011 for a detailed problem 
> description:
> https://lists.linux-foundation.org/pipermail/linux-pm/2010-December/thread.html#29654
> and the screenshots on http://www-users.rwth-aachen.de/martin.suefke/s2ram/
> 
> I re-tested now with 2.6.38-rc4 and 2.6.22 (git pulls from Linus 
> Torvald's kernel tree) in a desperate attempt to find any working
> version, so I could maybe try to pin down the problem by git-bisect.
> However, also with 2.6.22 and 2.6.38-rc4 suspend to ram does not work.
> 
> The configurations for these kernels were made with 'make oldconfig'
> from this configuration:
> http://www-users.rwth-aachen.de/martin.suefke/s2ram/Kernel_config_2.6.37-rc6
> 
> If anybody has any clue, hint, suggestion or questions regarding the
> issue, please drop me a note.

I don't have any ideas about debugging this, but I do have an idea
about where you might get more help.  Post a message to LKML, and don't
describe it as a suspend problem.  Instead, describe it as a problem
enabling CPU cores after the system has gone through a suspend/resume
cycle.  This may help attract the attention of people who are familiar
with the issues involved in enabling and disabling CPUs -- which 
appears to be the source of your difficulties.

Alan Stern