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Old 09-06-04, 11:26 AM   #1
martinjreed
Martin Reed
 
Join Date: Aug 2004
Posts: 8
Default Control backlight for GeForce FX Go 5200

I would like to turn off my laptop LCD backlight when I shut the lid, in particular when working in the office connected to an external screen (the laptop gets very hot and previous experience with a Dell Inspiron has shown turning off the backlight makes all the difference).

I am using an Dell Inspiron 5150 with GeForce FX Go 5200, running Gentoo linux with vanilla kernel 2.6.7, xorg-x11-6.7.0, and the nvidia module from 1.0-6111.

Just for interest when I run:

xset dpms force off

It blanks the screen but does not turn off the backlight. (Note that I am not really wanting dpms becuase I want the internal panel off but the external display on.) My previous laptop had an ATI GPU and I could used the "radeontool" package to control the LCD. Does something like this exist for the linux nvidia cards so that the backlight can be controlled?

Martin
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Old 09-07-04, 06:24 AM   #2
kahuna0k
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Join Date: Mar 2003
Posts: 26
Default Re: Control backlight for GeForce FX Go 5200

When you switch displays with Fn+F8 you can select what you want on and what you want off, I mean, just press Fn+F8 until LCD is off and external monitor is on.
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Old 09-08-04, 07:07 AM   #3
martinjreed
Martin Reed
 
Join Date: Aug 2004
Posts: 8
Default Re: Control backlight for GeForce FX Go 5200

Quote:
Originally Posted by kahuna0k
When you switch displays with Fn+F8 you can select what you want on and what you want off, I mean, just press Fn+F8 until LCD is off and external monitor is on.
Actually using the twinview options in Xorg and the nvidia driver the Fn+F8 no longer works (it does mention this somewhere in the nvidia driver README I seem to rememeber). Even so when I am in console mode (Fn+F8 does then work), the backlight is still on when I switch...

Thanks for your reply anyway... does anyone have a solution to this?
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