[Bug 352699] [NEW] Brightness up/down key sensibility on fujitsu u9200

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Hi there!!

I have a fujitsu esprimo u9200 and the brightness up/down key aren't
behaving properly, since they increase/decrease to much.

cat /proc/acpi/video/GFX0/LCD/brightness reports the following:
levels:  0 1 2 3 4 5 6 7
current: 7

If I press the key up key one time, it will decrease to 4, then to 1 or
0 and the to 0. Usually that means going from too bright to too dark...
the brightness applet works fine, full control over the different
levels.

lshal -m, pressing one up one down:
22:58:22.325: computer_logicaldev_input_0 condition ButtonPressed = brightness-up
22:58:32.482: computer_logicaldev_input_0 condition ButtonPressed = brightness-down

acpi_list, one up one down:
video LCD 00000086 00000000    // that's up
video LCD 00000087 00000000    // that's down

xev also doesn't seem to report anything abnormal

UPDATES: 
sudo modprobe -r video solves the problem, it will go up/down just fine. However, acpi_listen and lshal -m won't report anything. Same way, without the video module, brightness won't go down automatically when in battery.

lshal -m reports:

modprobe -r video
  23:19:02.059: computer_backlight removed
  23:19:02.071: computer_logicaldev_input_0 removed

modprobe video
  23:18:59.710: computer_backlight added
  23:18:59.809: computer_logicaldev_input_0 added

Also, has running without the video module any side effects in
performance?

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: regression-release
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Brightness up/down key sensibility on fujitsu u9200
https://bugs.launchpad.net/bugs/352699
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