Please describe the problem:
I just installed F10 on my Acer TravelMate 3260 laptop. The ACPI stuff like
bluetooth, screen brightness etc. is handled by acer-wmi module. In Fedora 9,
brightness control worked perfectly. In Fedora 10, I am having the problems
with both control of brightness in preferences, and the on-screen display which
appears when I change brightness using the Fn+Arrow keys. The problem is
reproduced with exactly the same results on a Ubuntu 8.10 LiveCD which uses GNOME 2.24.



Steps to reproduce:
1. In g-p-m Preferences, "On AC Power", Set display brightness to XX% doesn't
work
2. Control brightness using Fn+Left/Right arrow keys, OSD shoots beyond max and
min limits


Actual results:
1. The brightness does not reduce/increase
2. The OSD fill increases even after full brightness, and decreases even after
zero

Expected results:
1. Change should take place instantly
2. OSD fill limits should be between actual limits of brightness only

Does this happen every time?
Always

Other information:
I can control brightness software-"manually" from the console, by manually
writing and reading entries from
/sys/devices/platform/acer-wmi/backlight/acer-wmi. Here is sample output:

[rohan@fedora acer-wmi]$ pwd
/sys/devices/platform/acer-wmi/backlight/acer-wmi
[rohan@fedora acer-wmi]$ cat max_brightness 
15
[rohan@fedora acer-wmi]$ cat actual_brightness 
10
[rohan@fedora acer-wmi]$ echo 5 | sudo tee brightness 
5
[rohan@fedora acer-wmi]$ cat brightness 
5
[rohan@fedora acer-wmi]$ cat actual_brightness 
5
[rohan@fedora acer-wmi]$