Comment 14 for bug 550979

 I suffer the same problem in my HP 6730b.

 When I press the "+" or "-" volume function keys (tactile keys between keyboard and screen) then the key blinks like if it's being continously pressed and notify-osd shows in the screen the volume meter until I reboot the computer.

 The notify-osd "volume meter" then appears continuosly and it sometimes steals the keyboard focus and mouse motion so I have to reboot to continue working correctly in my lapton.

 Those keys worked perfectly in 9.04 and 9.10, and have started working incorrectly after upgrade to 10.04.