Hibernation/sleep stopped working

Question

After the recent updrade (with kdemod) on my laptop the hibernation stopped working (sleep also). I dont really know what could be the problem but I was working perfectly.
Now the sleep/hibernate buttons dont work also when i close the laptop lid nothing happens.

Answer 1

I'm not very knowledgeable about this, so hopefully someone else will weigh in on this. I have no idea how KDE does its thing; I set up suspend/resume independently of X. This method will not lock your session on resume (you won't be prompted for your password), but it is also possible to do that.
If you have acpid installed, in /etc/acpi/, you should have a script named handler.sh. Mine looks like this:
#!/bin/sh
set $*
case "$1" in
button/lid)
#echo "LID switched!">/dev/tty5
grep -q "open" < /proc/acpi/button/lid/LID/state
if [ $? = 1 ];
then
#lid was closed
logger "acpid: lid closed; suspending"
/usr/sbin/pm-suspend
else
#lid was opened
/usr/sbin/pm-resume
logger "acpid: lid opened; resuming"
fi
ibm/hotkey)
case "$4" in
00001003)
logger "acpid: screen blank button (Fn+F3) pressed; ignoring"
00001004)
logger "acpid: sleep button (Fn+F4) pressed; suspending"
/usr/sbin/pm-suspend
logger "acpid: action $4 undefined or not implemented yet"
esac
logger "ACPI group/action undefined: $1 / $2"
esac
(I cut out a lot of stuff that's irrelevant to suspend/resume.) You may be able to cut/paste the button/lid part directly. If you don't have an IBM computer, ibm/hotkey probably won't work for your sleep/hibernate buttons. However, what you can do is run the program acpi_listen from a terminal and press your sleep or hibernate button. If it prints something out, you can try replacing the "ibm/hotkey" and "00001004" with the appropriate fields. For reference, here is what I get when I run acpi_listen and press my sleep button:
ibm/hotkey HKEY 00000080 00001004