I can confirm the problem exists in 10.10 beta. I'm using a T60 and the volume up, down, and mute buttons do not produce any type of OSD. The brightness OSD works, but the bar it draws on screen doesn't always go to 0%, nor does it always go to 100%. It seems to get stuck around 20% and 80%.
I can confirm the problem exists in 10.10 beta. I'm using a T60 and the volume up, down, and mute buttons do not produce any type of OSD. The brightness OSD works, but the bar it draws on screen doesn't always go to 0%, nor does it always go to 100%. It seems to get stuck around 20% and 80%.