Comment 28 for bug 45404

The new acpi-support (0.101) and hotkey-setup (0.1-17ubuntu15) packages stop thinkpad-keys from running so the 2% CPU usage dropped which is good.

However, none of the hotkeys were working. After a quick investigation, it seems that the thinkpad_acpi kernel module wasn't being loaded. A simple "sudo modprobe thinkpad_acpi" was enough to get the keys working again (I just tested the volume and brightness keys but I assume the rest were working).

For reference, I am using a Thinkpad X60s (i.e. one that reports Lenovo as the manufacturer, if that makes a difference).