[TriLUG] Laptop ACPI S3 and swsusp2

[David McDowell]

Kernel options is something I haven't messed with, we aren't talking
about recompiling it are we?  That next section of commands, is that a
small script you run to being the suspend to RAM process?  If so, what
is the unsuspend process like, or does it need to be setup
specifically/separately?

I wonder if xbindkeys would let me launch the suspend to RAM process
using the Fn keys on my IBM T42??  That way I'd feel like I was using
the keyboard Fn as designed. (b/c of IBM<-->Microsoft's contracts).

Thanks,
David


On 7/5/05, Ed Hill <ed at eh3.com> wrote:
> On Tue, 2005-07-05 at 16:42 -0400, David McDowell wrote:
> > I just got an IBM T42 (not the p unfortunately so I have XGA instead
> > of SXGA) on the EPP and it runs well.  I'm running CentOS 4.1 but have
> > NO ACPI sleep/standy options available to me right now.  New thread??
> > If anyone has any tips for me, that'd be great.  :)
> 
> Hi David,
> 
> To get ACPI S3 ("suspend to RAM") to work, please try adding:
> 
>  pci=noacpi acpi_sleep=s3_bios
> 
> to your kernel options.  With that in place and with the USB and WiFi
> kernel modules unloaded, the S3 suspend mode works very nicely and
> reliably for me:
> 
>  modprobe -r usb-controller1
>  modprobe -r usb-controller
>  killall dhclient
>  modprobe -r eth1
>  modprobe -r eth0
>  echo -n 3 > /proc/acpi/sleep
> 
> 
> Another option is swsusp2.  A guy in Germany is providing an excellent
> set of FC3 and FC4 kernels and other RPMs that support swsusp2.  The
> directions and downloads are at:
> 
>  http://mhensler.de/swsusp/
> 
> and the main project page is:
> 
>  http://www.suspend2.net/
> 
> One of the really nice things about swsusp2 is that it doesn't require
> any special hardware support.  So it should theoretically work on any
> laptop or desktop.  And it burns no battery power over time.
> 
> I've found that some recent SELinux "targeted" policies in FC3 and FC4
> will disable swsusp2 so I've disabled SELinux.  As always, YMMV...  ;-)
> 
> Ed
> 
> --
> Edward H. Hill III, PhD
> office:  MIT Dept. of EAPS;  Rm 54-1424;  77 Massachusetts Ave.
>             Cambridge, MA 02139-4307
> emails:  eh3 at mit.edu                ed at eh3.com
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> 
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