please look here, https://bugs.launchpad.net/ubuntu/+source/linux/+bug/505452/comments/28
adding "acpi_osi=Linux" fixed many keys but broke others that was working before the change.
F7 turn off screen brightness key no longer show pop-up but works
please look here, /bugs.launchpad .net/ubuntu/ +source/ linux/+ bug/505452/ comments/ 28
https:/
adding "acpi_osi=Linux" fixed many keys but broke others that was working before the change.
F7 turn off screen
brightness key no longer show pop-up but works