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

[Garm]

Hi everyone,
I've a Samsung N150 and Ubuntu 10.04. I've just installed the "samsung-tools samsung-backlight" using:

sudo add-apt-repository ppa:voria/ppa
sudo apt-get update && sudo apt-get upgrade
sudo apt-get install samsung-tools samsung-backlight
sudo reboot

After the first reboot it worked well, but after a second reboot I can't
have access to the system because the screen is continuously reloading.
I mean it passes from whitescreen to the desktop image every second,
without loading the entire desktop.

How can I come back to a normal situation? Heeelp!!! 
Thank you,
Garm

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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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