Linux Commands Examples

A great documentation place for Linux commands


utility to get/set registers and to control backlight on radeon based laptops


radeontool [option] [command]

add an example, a script, a trick and tips

: email address (won't be displayed)
: name

Step 2

Thanks for this example ! - It will be moderated and published shortly.

Feel free to post other examples
Oops ! There is a tiny cockup. A damn 404 cockup. Please contact the loosy team who maintains and develops this wonderful site by clicking in the mighty feedback button on the side of the page. Say what happened. Thanks!


./radeontool regset FP_GEN_CNTL 0x0023058d


This manual page documents briefly the radeontool command.

This manual page was written for the Debian distribution because the original program does not have a manual page.

radeontool is a program that switches on/off backlight and external output on ATI Radeon based laptops, and is able to list or set register values.


These programs follow the usual GNU command line syntax, with long options starting with two dashes (’-’). A summary of options is included below.


Show a little debug info


Skips the first n cards and acts on the n+1


You can specify one of the following commands:
dac [on|off]

Power down the external video output

light [on|off]

Power down the backlight

stretch [on|off|vert|horiz|auto|manual]

Adjusts stretching for resolution mismatch


Show a listing of some random registers

regmatch [pattern]

Show registers matching wildcard pattern

regset [pattern] [value]

Set registers matching wildcard pattern


This manual page was written by Luigi Gangitano luigi[:at:]debian[:dot:]org for the Debian system (but may be used by others). Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 any later version published by the Free Software Foundation.

On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL.

How can this site be more helpful to YOU ?

give  feedback