I have a thinkpad T520, and my touchpad stopped working after upgrade.
I tracked /etc/acpi/events/lenovo-touchpad to a problem with the getXuser
function in /usr/share/acpi-support/power-funcs.
I changed this line:
user=$(who | awk "/:$displaynum)/ { print \$1; exit }")
to this (escaping the parenthesis):
user=$(who | awk "/:$displaynum\)/ { print \$1; exit }")
and I was able to enable my touchpad.
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https://bugs.launchpad.net/bugs/804109
Title:
can't enable touchpad in Ubuntu 11.10
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