Re: [Trisquel-users] Adding a 3rd monitor?

[silvibus]

# View available outputs
$ xrandr

# Enable the VGA1 output
$ xrandr --output VGA1 --auto # automatically select mode
# Turn it off
$ xrandr --output VGA1 --off

# Set up a dual display, using outputs LVDS1 and VGA1
$ xrandr --output LVDS1 --mode 1024x768 --pos 0x0 --output VGA1 --mode  
1920x1080 --pos 1024x0 # Have VGA1 appear right from LVDS1


# Set up 3 monitors. Never done this, but it appears logical
$ xrandr --output LVDS1 --mode 1024x768 --pos 0x0 --output VGA1 --mode  
1920x1080 --output VGA2 --mode 1920x1080 --pos $((1024 + 1920))x0


# fool around with the --pos argument. X11 puts all your monitors inside a  
big rectangle. You'll also need to select a valid mode.


# create a new mode
$ gtf WIDTH HEIGHT REFRESH_RATE #| sed -nr 's/Modeline (.+)/\1/p'
$ xrandr --newmode # output of the above command (everything after  
'Modeline')
$ xrandr --addmode OUTPUT # insert modename, the double quoted string from  
the first command

# use the new mode
$ xrandr --output OUTPUT --mode DOUBLE_QUOTED_STRING_FROM_ABOVE_COMMAND


$ man xrandr # for more information

Re: [Trisquel-users] Adding a 3rd monitor?

[webmaster]

Never mind, I've removed the other graphics card and I'm going to use the  
monitor for something else.

Re: [Trisquel-users] Adding a 3rd monitor?

[davesamcdxv]

Would trying Arandr (available in the repos I think) work?

Re: [Trisquel-users] Adding a 3rd monitor?

[webmaster]

Yes, it's in the repos. But it only detects my current displays. (=ignoring  
the second graphics card)

[Trisquel-users] Adding a 3rd monitor?

[webmaster]

I've got a 3rd monitor which is connected to an older graphics card (I  
grabbed that from my older computer).


Both graphics cards is detected, I can see them if I type lspci. When I run  
xrandr, it shows all displays, but the 3rd monitor is disabled. My question  
is, how do I enable it?


I've read a few guides, but they usally say that I have to add some lines to  
/etc/X11/xorg.conf, which I have renamed to solve some issues with  
3D-acceleration. Btw, where is the graphic settings stored?


And yes, if I click Display in the system settings, it only shows my two  
initial monitors, so I can't enable it from there.


Setup:

[Card 1]: Monitor 1 (1680x1050) + Monitor 2 (1680x1050)

[Card 2]: Monitor 3 (1920x1080)