Comment 16 for bug 816145

Oh, and if you want to work around the problem temporarily the easiest thing to do is to unload the hp_wmi module (sudo rmmod hp_wmi). You can make it persist across reboots by adding the line 'blacklist hp_wmi' to /etc/modprobe.d/blacklist.conf. You will loose some functionality however, probably most noticeable is support for hotkeys.