Arch Linux

maxarsys

Member

Registered: 2013-09-01

Posts: 61

Howto dual screen and scale ?

Hi, I have a question I found how to dual screen with :

xrandr --output LVDS1 --primary --preferred --mode 1280x800 --pos 0x0 --rotate normal --output HDMI1 --auto --right-of LVDS1 --rotate normal

But My center panel of lxde goes in the middle of the two screens, is it possible to have a dual screen but kinda separated for the window manager ?
And also the hdmi screen is not well aligned with the window manager it seems that the resolution is too big for  the screen on the hdmi, there is a solution to that ?

Last edited by maxarsys (2013-09-03 15:09:39)

hiciu

Member

Registered: 2010-08-11

Posts: 84

Re: Howto dual screen and scale ?

And also the hdmi screen is not well aligned with the window manager it seems that the resolution is too big for  the screen on the hdmi, there is a solution to that ?

You can set resolution per display with xrandr. I'm unable to test it right now, but it was something like this:

xrandr --output HDMI1 -s 800x600

But My center panel of lxde goes in the middle of the two screens, is it possible to have a dual screen but kinda separated for the window manager ?

That depends on window manager. I don't know how well openbox supports multiple monitors (I'm assuming you are using openbox with lxde). There are other window managers, there is also openbox branch with multi-monitor support: https://aur.archlinux.org/packages/open … ihead-git/.

DarksideEE7

Member

From: Arkansas, United States

Registered: 2009-06-06

Posts: 356

Re: Howto dual screen and scale ?

For my 3x portrait mode setup (in KDE, but shouldn't matter) I configured everything via xorg.conf using the 'Absolute' option, using parameters that indicate the absolute position of each screen with pixels as coordinates.  For 3 portrait mode 1920x1080 monitors:

 16 Section "Monitor"
 17   Identifier              "DisplayPort-1"
 18   Option "Rotate"         "Right"
 19   Option "Position"       "0 0"
 20 EndSection
 21 
 22 Section "Monitor"
 23   Identifier              "HDMI-0"
 24   Option "Rotate"         "Right"
 25   Option "Position"       "1080 0"
 26 EndSection
 27 
 28 Section "Monitor"
 29   Identifier              "DisplayPort-0"
 30   Option "Rotate"         "Right"
 31   Option "Position"       "2160 0"

Check out the man page for xorg.conf for more info.  This is using ati open source drivers with 2 7950s.

Last edited by DarksideEE7 (2013-09-07 04:35:54)