ACPI and suspend

[Michal Jaegermann]

On Mon, Aug 23, 2004 at 12:50:20PM +1000, Russell Coker wrote:
> > Am So, den 22.08.2004 schrieb Russell Coker um 14:03:
> > > The default configuration of ACPI on my Thinkpad T41p is that closing the
....
> 
> I just tried "echo 3 > /proc/acpi/sleep" and got the following error in the 
> kernel message log:
> 
> PM: Preparing system for suspend
> Stopping tasks: ===================================================|
....
> Restarting tasks... done
....
> 00:1d.7 USB Controller: Intel Corp. 82801DB/DBM (ICH4/ICH4-M) USB 2.0 EHCI 
                                                                        ^^^
> So it seems that I have some USB issue.

And IIRC it was already discussed on this list and ehci indeed seems
to interfere with suspend.  I do not have a Thinkpad but on Acer of
my wife a power button is configured to suspend and its script in
/etc/acpi/events/powerb.conf looks now like this:

event=button/power.*
action=/sbin/modprobe -r ehci_hcd; sync; sync; sleep 2 ; echo -n "mem" > /sys/power/state

If EHCI support module is really needed then it will get inserted on
a resume.

If this is not enough then try adding 'acpi_sleep=s3_bios' in your
kernel parameters.

Using APM instead on that particular Acer is not an option but with
the above it not only suspends but it even wakes up. :-) With an
exception of a floppy which is unusable after such cycle.
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=127163
and nothing changed so far.

   Michal