Linux screen Brightness adjustment command

My Fujitsu S7211 Laptop screen shows up in Ubuntu 10.04 as bright as in Vista, always thinking it is a drive problem. Later from the Foreigner's blog, found that the brightness can actually be adjusted.

2 ways:

1. Adjust the screen contrast parameter gamma value

> Xgamma-gamma. 75

If not ideal, try changing the. 75 to 0.5~1.0 to test. I use 1.0 after feeling and vista under brightness consistent.

This command does not require administrator privileges.

2. Adjust the backlight of the laptop screen PCI

> sudo setpci-s 00:02.0 f4.b=xx

XX is the screen brightness value represented by the 16 binary, range 0 (brightest) ~ff (darkest).

00:02.0 is the VGA device code for your display.

Check your VGA device code with the LSPCI command:

> Lspci

00:00.0 Host bridge:intel Corporation Mobile pm965/gm965/gl960 Memory Controller Hub (rev. 03)

00:02.0 VGA compatible Controller:intel Corporation Mobile gm965/gl960 Integrated Graphics Controller (rev. 03)

00:02.1 Display controller:intel Corporation Mobile gm965/gl960 Integrated Graphics Controller (rev. 03)

00:1a.0 USB Controller:intel Corporation 82801H (ICH8 Family) USB UHCI Controller #4 (rev 03)

Note the second line 00:02.0 VGA compatible controller

Linux screen Brightness adjustment command