Public bug reported:

Power Manager Brightness Applet 2.21.1 on Hardy Current Alpha 4Power
Manager Brightness Applet 2.21.1 on Hardy Alpha 4 (up-to-date) Intel
32-bit.

I can not manage my display brightness using the keyboard, screen or any
other method. I do not think the display and the kernel communication?

It seems that my laptop (IBM Lenovo Z60m) is able to change the
brightness settings in the Bios HOWEVER once I boot into Linux this
program referenced above (Brightness Applet in Gnome) does not properly
talk to ACPI, HAL or anything else.

>From http://bugzilla.gnome.org/show_bug.cgi?id=337580 :
"Some code needs to be written to do this - there's no ACPI method to do it, but
it can be done via an SMBios call from userspace."

It means that the system does not know, and cannot change, the
brightness of the monitor.

** Affects: ubuntu
     Importance: Undecided
         Status: New


** Tags: brightness display gnome hal

** Tags added: brightness display gnome hal

-- 
cannot get panel brightness
https://bugs.launchpad.net/bugs/191157
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