Error: kernel cannot suspend to ram.

[Doncho N. Gunchev]

On Sunday 2007-09-30 22:20:48 Paul Smith wrote:
> On 9/30/07, Doncho N. Gunchev <gunchev at gmail.com> wrote:
> > > > When running on the console the command 'pm-suspend', I get the following:
> > > >
> > > > $ pm-suspend
> > > > Error: kernel cannot suspend to ram.
> > > > $

I just looked at pm-suspend's source. This error message means that
in /sys/power/state there's no mem present (try 'cat /sys/power/state'
to see what is supported).

..
> > The kernel thinks this machine can not suspend to ram.
...
> > > $ uname -r
> > > 2.6.22.9-91.fc7
...
> The lspci output:
> 
> 00:00.0 Host bridge: Intel Corporation 82945G/GZ/P/PL Memory Controller Hub (rev 02)
> 00:01.0 PCI bridge: Intel Corporation 82945G/GZ/P/PL PCI Express Root Port (rev 02)
> 00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)
> 00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 01)
...
> 01:00.0 VGA compatible controller: nVidia Corporation GeForce 6500 (rev a1)

This one can cause problems at resume, but not at suspend time :-)
...
> 
> The output of 'cat /proc/cpuinfo' is:
> 
> processor	: 0
> vendor_id	: GenuineIntel
> cpu family	: 15
> model		: 4
> model name	: Intel(R) Pentium(R) D CPU 2.80GHz
> stepping	: 7
> cpu MHz		: 2813.806
...
> processor	: 1
...
> 
> Paul
> 

Is this a desktop (Pentium M was for mobile AFAIK), isn't it?

Has this machine ever been able to suspend to RAM?
If so, have you changed something in your BIOS?

Please check what these two say:
grep -i 'power states' /var/log/messages
grep -i 'suspend' /var/log/messages


I've seen something like / long ago :-) /:
'Software Suspend has malfunctioning SMP support. Disabled :('
but have no idea what the current status is...

-- 
Regards,
  Doncho N. Gunchev, GPG key ID: 0EF40B9E, Key server: pgp.mit.edu