Date: Sun, 28 Apr 2002 18:04:16 +0100
From: David Gardner <[EMAIL PROTECTED]>
Subject: Re: [LIB] display brightness

> > >Got it. He also has a link to the bios calls. It looks like the backlight
> > >cannot be shut off totally through the bios.
> > >
> > I have a feeling I've come across some reference somewhere that suggests it 
> > can...
> 
> I did a quick google search and found some refeances to there 
> being 5 settings for the backlight not 4- one being off. No source 
> though. I can hook up an external display and see if I can shut off 
> the backlight in the lcd. I want to test the apm bios info I have. I 
> don't have a test libretto yet to do anything to anyway so it'll be 
> awhile.

It is possible.  If you use the libapm utility for Linux then it gives 
backlight settings which include the backlight being completely off.  I can
vouch for it making the screen almost entirely unreadable on my 50CT :)



        Dave




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