在尚未設定之前，若連接兩個以上的顯示器，使用觸控螢幕時，會橫跨兩個螢幕來觸控，所以須將觸控螢幕對應到正確的螢幕上，觸控時才不會有問題
1. 輸入 xrandr 指令查看已連接的螢幕，筆記型電腦螢幕在以下範例為 LVDS1
/* EX: */
$ xrandr
Screen 0: minimum 8 x 8, current 3286 x 1080, maximum 32767 x 32767
LVDS1 connected primary 1366x768+0+312 (normal left inverted right x axis y axis) 310mm x 170mm
1366x768 59.98*+
1280x720 59.74
1024x768 60.00
1024x576 60.00 59.90 59.82
960x540 60.00 59.63 59.82
800x600 60.32 56.25
864x486 60.00 59.92 59.57
640x480 59.94
720x405 59.51 60.00 58.99
680x384 60.00
640x360 59.84 59.32 60.00
DP1 disconnected (normal left inverted right x axis y axis)
HDMI1 connected 1920x1080+1366+0 (normal left inverted right x axis y axis) 600mm x 340mm
1920x1080 60.00*+ 50.00 59.94
1920x1080i 60.00 50.00 59.94
1600x1200 60.00
1680x1050 59.88
1400x1050 59.95
1280x1024 75.02 60.02
1440x900 59.90
1280x960 60.00
1152x864 75.00
1280x720 60.00 50.00 59.94
1024x768 75.03 70.07 60.00
832x624 74.55
800x600 72.19 75.00 60.32 56.25
720x576 50.00
720x576i 50.00
720x480 60.00 59.94
720x480i 60.00 59.94
640x480 75.00 72.81 66.67 60.00 59.94
720x400 70.08
VGA1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)2. 輸入 xinput --list 指令查看已連接的裝置，筆記型電腦的觸控式螢幕在以下範例為 LVDS1
/* EX: */
$ xinput --list
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ Atmel Atmel maXTouch Digitizer id=11 [slave pointer (2)]
⎜ ↳ ETPS/2 Elantech Touchpad id=14 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)]
↳ Asus Wireless Radio Control id=6 [slave keyboard (3)]
↳ Video Bus id=7 [slave keyboard (3)]
↳ Power Button id=8 [slave keyboard (3)]
↳ Sleep Button id=9 [slave keyboard (3)]
↳ ASUS USB2.0 Webcam: ASUS USB2.0 id=10 [slave keyboard (3)]
↳ Asus WMI hotkeys id=12 [slave keyboard (3)]
↳ AT Translated Set 2 keyboard id=13 [slave keyboard (3)]3. 輸入 xinput map-to-output
指令將觸控螢幕對應到螢幕，以下範例為將 id=11 的觸控螢幕對應到 LVDS1的螢幕
/* EX: */
$ xinput map-to-output 11 LVDS1