[2024-feb-29] Sad news: Eric Layton aka Nocturnal Slacker aka vtel57 passed away on Feb 26th, shortly after hospitalization. He was one of our Wiki's most prominent admins. He will be missed.

Welcome to the Slackware Documentation Project

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Next revision		Previous revision
howtos:window_managers:dual_monitors [2016/01/04 07:50 (UTC)] – created (saving to NOT lose my work so far) arfonhowtos:window_managers:dual_monitors [2016/02/03 23:03 (UTC)] (current) – Changed title - no change in info. arfon
Line 1: Line 1:
 <!-- Add your text below. We strongly advise to start with a Headline (see button bar above). --> <!-- Add your text below. We strongly advise to start with a Headline (see button bar above). -->
-====== DUAL MONITORS ======+====== Dual Monitors ====== 
 +Known to work on Slackware 14.1 and XFCE 
 + 
 + 
 +If you are running XFCE and your secondary monitor isn't working, check and make sure it's enabled in XFCE's SETTINGS: 
 + 
 +SETTINGS > SETTING MANAGER > DISPLAY > display name in column on left > USE THIS OUTPUT 
 + 
  
 ====== Mirror Monitors ====== ====== Mirror Monitors ======
Line 8: Line 16:
  
 ====== Extend Desktop To Second Monitor ====== ====== Extend Desktop To Second Monitor ======
-To extend the desktop to a second monitor (as opposed to mirror the desktop), you need to use xrandr to move the desk top over X number of pixels. Where X = your LEFT monitor's X resolution \\ +To extend the desktop to a second monitor (as opposed to mirror the desktop), you need to use xrandr to move the desk top over X number of pixels. Where X = your LEFT monitor's X resolution. 
- - Make sure your video card's output is being 'seen' by the system and get the output names:+ 
 +1) Make sure your video card's output is being 'seen' by the system and get the output names:
 <code> xrandr -q </code> <code> xrandr -q </code>
-Make note of the name of your secondary monitor.+ ( Make note of the name of your secondary monitor. )
  
-- Move the secondary monitor over to the right+2) Move the secondary monitor over to the right
 <code> xrandr --output HDMI-0 --pos 1024x0 # to move the VGA screen 1024 pixels to the right. </code> <code> xrandr --output HDMI-0 --pos 1024x0 # to move the VGA screen 1024 pixels to the right. </code>
  
-EXAMPLE: Here's my machine. DVI-I-0 is my LEFT monitor and HDMI-0 is my RIGHT monitor.+EXAMPLE: Here's my machine. DVI-I-2 is my LEFT monitor and HDMI-0 is my RIGHT monitor.
 <code> <code>
 [arfon@darkstar ~]$ xrandr -q [arfon@darkstar ~]$ xrandr -q
Line 47: Line 56:
  
  
 +====== Cool Switching Scripts ======
 +Here's a script I wrote to toggle between extended dual monitors and a single monitor-
 +<code>
 +#!/bin/bash
 +vPRIMARYMONITOR="DVI-I-0" # <--- CHANGE THIS.  Find using "xrandr -q"
 +vLOC="--right" # <--- Change this if you want the second monitor in another position. CHOICES: --above  --below  --left  --right
 +vEXT=$(xrandr -q | grep " connected" | grep -v $vPRIMARYMONITOR | awk '{print $1}' | head -n 1 )
 +vOnOff=$(xrandr -q | grep $vEXT | sed 's/primary//g' | awk '{print $3}'| sed 's/[0-9]*x[0-9]*+[0-9]*+[0-9]*/ON/g' )
 +[ "$vOnOff" != "ON" ] && vOnOff="OFF"
 +if [ "$vOnOff" = "OFF" ]; then
 +        /usr/bin/xrandr --output $vEXT --auto $vLOC $vPRIMARYMONITOR
 +        else
 +        /usr/bin/xrandr --output $vEXT --off
 +        fi
 +
 +</code>
 +
 +Script to toggle a mirrored monitor-
 +<code>
 +#!/bin/bash
 +vPRIMARYMONITOR="DVI-I-0" # <--- CHANGE THIS.  Find using "xrandr -q"
 +vEXT=$(xrandr -q | grep " connected" | grep -v $vPRIMARYMONITOR | awk '{print $1}' | head -n 1 )
 +vOnOff=$(xrandr -q | grep $vEXT | sed 's/primary//g' | awk '{print $3}'| sed 's/[0-9]*x[0-9]*+[0-9]*+[0-9]*/ON/g' )
 +[ "$vOnOff" != "ON" ] && vOnOff="OFF"
 +if [ "$vOnOff" = "OFF" ]; then
 + /usr/bin/xrandr --output $vEXT --auto
 + else
 + /usr/bin/xrandr --output $vEXT --off
 + fi
 +</code>
  
  

Trace:

howtos:window_managers:dual_monitors ()