acpi-support in conflict with guidance-power-manager

Binary package hint: acpi-support

I run Kubuntu 7.10 on a Toshiba laptop.

I noticed that my laptop didn't suspend properly when I closed the lid. It usually went into 100% CPU usage in the X server.

On the other hand, it suspended OK when doing it from the guidance-power-manager GUI, or even using the suspend button.

I finally traced the problem to be that /etc/acpi/lid.sh wasn't told to back off, as the suspend is handled by guidance-power-manager. And, in turn, this is due to the fact that /usr/share/acpi-support/policy-funcs isn't aware about guidance-power-manager. The following patch shows what I did to solve it:

--- /usr/share/acpi-support/policy-funcs.sv 2007-09-19 11:50:54.000000000 +0200
+++ /usr/share/acpi-support/policy-funcs 2007-10-20 15:03:17.000000000 +0200
@@ -1,5 +1,6 @@
 CheckPolicy() {
        if pidof gnome-power-manager kpowersave > /dev/null ||
+ pidof -x guidance-power-manager.py > /dev/null ||
           (pidof dcopserver > /dev/null && test -x /usr/bin/dcop && /usr/bin/dcop kded kded loadedModules | grep -q klaptopdaemon) ; then
                echo 0;
        else

(Another annoying thing is that the DCOP command in this function fails if run by root.)

Of course: if you run kpowersave you will not be bitten by any of the above problems.

It took me some time to figure this one out, I hope it can help someone else too.