Comment 41 for bug 771758

It looks like your machine is emitting a different code for the wlan key than what acer-wmi currently supports, and it also looks like the key doesn't actually change the state in the bios. I've got one more build, and this one really should get the wlan hotkey working.

http://people.canonical.com/~sforshee/lp771758/linux-2.6.38-10.44~lp771758v201106091502/

Also test with this build to see if you have any other hotkeys that aren't working -- since we're fixing the wlan key we might as well fix them all :). If any aren't working, run the command '/lib/udev/findkeyboards'. You should see a line that looks like "Acer WMI hotkeys: input/event?". Now run 'sudo /lib/udev/keymap -i input/event?', where "input/event?" matches the output from the previous command. Then press the hotkey and you will probably get some output. If so note the output along with the hotkey function here. If not you can also try the keymap command with the "AT keyboard" input device and see if it outputs anything. Be sure to note whether each key is coming in on the Acer WMI or AT keyboard device.

If you don't get any output from keymap, next run 'tail -f /var/log/kern.log' and then press your hotkey. If you get a "Unknown key number" message when you press the key, note that here along with the key function. If you don't then you've probably hit a hotkey that the driver is intentionally ignoring (there are some of these, and I'm not sure why the driver ignores them).

Thanks!