This is an annoying shortcoming in the current gnome-settings (used to
be gnome-power-manager). It does not check whether it should suspend
when entering on-battery state. Here's a work-around:
Put the following into an (executable) file
/etc/pm/power.d/zzsleepiflidclosed
#!/bin/sh
# If the lid is closed, then sleep when we are switched to battery mode.
case "$1" in
true) # Going into battery mode.
sleep 1
grep -q closed /proc/acpi/button/lid/*/state && dbus-send --print-reply
--system --dest=org.freedesktop.UPower /org/freedesktop/UPower
org.freedesktop.UPower.Suspend
;;
false) # Going into line power mode
;;
*)
exit
;;
esac
exit 0
I don't know why the sleep 1 pause is necessary, but without it, my
lenovo won't resume stably. 2 seconds may be needed.
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https://bugs.launchpad.net/bugs/1014891
Title:
Laptop doesn't suspend when power is unplugged while lid is closed
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