[Bug 574250] Re: SAMSUNG N150 Laptop : Brightness issue

[Duncan Clough]

This bug is still present in a fresh install of 11.04.  Ubuntu thinks
it's changing the brightness when I try change it using the fn keys and
moves the brightness bar up and down correctly, but the brightness of
the screen doesn't change (stays on full).

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https://bugs.launchpad.net/bugs/574250

Title:
  SAMSUNG N150 Laptop : Brightness issue

Status in “udev” package in Ubuntu:
  Fix Released

Bug description:
  Bug description:
  I have just bought a Samsung N150 laptop, very nice netbook.
  As I am a Ubuntu user since 2004, I directly replace Windows seven with the latest Ubuntu version (Lucid Lynx 10.04).

  I notice a systematic issue about screen brightness :
  - The brightness is full when when laptop start with power supply plugged, otherwise the brightness is half. When i try to adjust the brightness using special keys it doesn't work.
  Up to now, I have found on Ubuntu forum many guys relating the same behavior and i pickup a workaround. I use it until the fix will be available : sudo setpci -s 00:02.0 F4.B=50

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