On my MacBook 4.1 I experience this issue when I hibernate. As a
workaround, I have created /etc/pm/sleep.d/50-macbook_touchpad_fix with
the contents:
#!/bin/sh
# touchpad is frozen after resuming from hibernating until appletouch is
reloaded
if [ "$1" = 'thaw' ]; then
modprobe -r appletouch
modprobe appletouch
fi
and made it executable. The script just unloads and reloads the "appletouch"
module after resuming from hibernation. This should work if you are using
pm-hibernate to hibernate which was being used by default for me.
--
Synaptics touchpad ceases functioning after suspend and resume.
https://bugs.launchpad.net/bugs/59867
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