Comment 0 for bug 222796
Revision history for this message
| Joel Ebel (jbebel) wrote Thinkpad T43p brightness up not generating ACPI event | #0 |
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On my Thinkpad T43p, using ubuntu hardy, the brightness down button generates an ACPI event, but the brightness up button does not. Brightness is still adjusted in hardware, however, there is an interesting effect when using gnome power-manager. When turning the brightness up, it's handled all in hardware, but when you press the brightness down button, the brightness returns to the last stored brightness that gpm knew about, which is most likely at the bottom unless you use the brightness applet. So the net effect is that you can turn the brightness up incrementally, but as soon as you press the down key, it goes all the way to the bottom. Killing gnome-power-manager prevents this behaviour, but causes other problems.