Laptops and external monitors

Laptops and external monitors

Post by Goldman of Chao » Wed, 13 Jun 2001 22:41:08


I'm running Debian and the not-quite-most recient verion of X 4.3.?

Strange behavior,  when I do a 'startx' as root the active monitor
changes to the built in screen.  If I do a 'startx' as a non-root
user, the active screen will stay which ever screen I have currently

Not really a big deal, since I can still hit <FUNCT><F3> to switch
active monitors; however, any suggestions as to where to look to
make the root user behave the same as the non-root users?

Now that I have the dual head working on my main system, I'm
looking for other weirdness to clear up.

Pointers to files or man pages to read would be wonderful.  I'm
looking to better understand what is going on rather than just
'do this to fix'.



P.S. I'm running this all on a Compaq 1930 with the ATI Moble
Rage Pro 8 meg card.

  O      O            __ |     \|                             O       O    
 /|\   -/-   _ __\ O    _\O     |/      (/              O/    /\-    /|\
 / \   / )    /   \       |    /O    _ O/_   _ O_ ^_   / \^_   )\    / \

Its not *ism if you don't speak their language.  
La, la, la, I can't understand you.  La, la, la....


1. Using a laptop's external monitor port under Linux

: Greetings!
:   I have Linux running on my Compudyne 486/33 (4DX/33) Laptop
: computer. It has a port to connect an external SVGA monitor to
: that I would like to make use of. The only question is how to
: it. There is no entry in the BIOS setup menus that allow me to
: choose the external monitor versus the LCD display. The instruction
: manual / users guide that comes with it is basically useless in that
: they say "use the DOS utility VGACONF.EXE to select LCD, CRT, or
: BOTH..." Unfortunately, it does not keep the setting through a cold or
: warm boot cycle, and when I run Linux, it will only display on the LCD.

: If its any help the VGA BIOS says "Cirrus Logic CL-GD6410 version 2.03"

: Suggestions?

My laptop with this Cirrus Logic chipset uses an external command to switch

the video output from LCD to external. If I remember correctly the name was
Don't know how to handle this under Linux.
If you can program it yourself you should take a look at Ralf Brown's Interrupt
list, which contains some info about it.


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