I have a dual monitor setup of two different sizes. My primary monitor is a 23 in widescreen Acer T230H touchscreen, and the second is a regular 20 in. When I go to use the touchscreen, the cursor shows up on the secondary display depending on where I touch the display. How do I calibrate it to only control my primary monitor?
6 Answers
As Beni Cherniavsky-Paskin suggested in a comment, I used the following command to map an input device to an output screen:
xinput map-to-output <device> <output>
To figure out which is which, I first ran xinput
to list the input devices. From that listing, I observed that my touchscreen was "QUANTA Optical Touch Screen" and listed as device id 12. I then ran xrandr
to determine the touchscreen, which in my case was VGA1.
Simply entering the following command then did the trick:
xinput map-to-output 12 VGA1
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2
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1xinput ( at least as of version 1.6.2 allows you to use the device name instead of the ID ( which can change) . so the above xinput command becomes:– JJonesJul 31, 2018 at 20:51
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1
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1and you can use that command to make it persistent. For KDE you can use the Autostart program and enter that command with its options in "Add Program", or put it in a file, make it executable and select it from Autostart. For others try searching for: xinput startup and one of gnome, LWM or cinnimon etc.– JJonesJul 31, 2018 at 21:09
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Hey JJones, you should add the name version of that command to an actual answer rather than in the comments, it was really helpful! :) Dec 26, 2019 at 1:14
As Beni Cherniavsky-Paskin and Paul Lammertsma suggested in above comments xinput map-to-output <device> <output>
did the trick for me!
you first need to run xinput
to get the id of inupt device,
the above command return something like this for me.
user@user-hpEnvy:~$ xinput
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ Logitech Unifying Device. Wireless PID:401b id=10 [slave pointer (2)]
⎜ ↳ Logitech Unifying Device. Wireless PID:4016 id=11 [slave pointer (2)]
⎜ ↳ ELAN20E7:00 04F3:20E7 id=13 [slave pointer (2)]
⎜ ↳ SynPS/2 Synaptics TouchPad id=15 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)]
↳ Power Button id=6 [slave keyboard (3)]
↳ Video Bus id=7 [slave keyboard (3)]
↳ Video Bus id=8 [slave keyboard (3)]
↳ Power Button id=9 [slave keyboard (3)]
↳ HP Truevision HD id=12 [slave keyboard (3)]
↳ AT Translated Set 2 keyboard id=14 [slave keyboard (3)]
↳ HP Wireless hotkeys id=16 [slave keyboard (3)]
↳ HP WMI hotkeys
Next I ran xrandr
to get the list of screens and the output of the command is like this
user@user-hpEnvy:~$ xrandr
Screen 0: minimum 8 x 8, current 3840 x 1080, maximum 32767 x 32767
eDP1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 382mm x 215mm
1920x1080 60.0*+ 59.9 40.0
1680x1050 60.0 59.9
1600x1024 60.2
1400x1050 60.0
1280x1024 60.0
1440x900 59.9
1280x960 60.0
1360x768 59.8 60.0
1152x864 60.0
1024x768 60.0
800x600 60.3 56.2
640x480 59.9
HDMI1 connected primary 1920x1080+1920+0 (normal left inverted right x axis y axis) 600mm x 340mm
1920x1080 60.0*+ 50.0 59.9
1680x1050 59.9
1600x900 60.0
1280x1024 60.0
1440x900 59.9
1280x720 60.0 50.0 59.9
1024x768 60.0
800x600 60.3
720x576 50.0
720x480 60.0 59.9
640x480 60.0 59.9
720x400 70.1
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
In my case the touch device is ELAN20E7:00 04F3:20E7 id=13
and touch enabled screen is eDP1
to fix the issue i need to map the device the that monitor only for that i ran this command xinput map-to-output 13 eDP1
Problem solved and its working fine again :)
I am using elementary OS freya, so it should work for all distros based on Ubuntu 14.04 LTS
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Exact same command worked for me on my HP Envy 15-k016nr laptop with external monitor. Mar 20, 2017 at 22:13
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2This worked perfectly on my Dell Inspiron 5547. Interestingly I used
id=13
which corresponds to myELAN Touchscreen
, even thoughSynPS/2 Synaptics TouchPad
is whatxinput-calibrator
was using by default.– SimonTJun 19, 2017 at 1:52 -
Worked for me also on a Lenovo Thinkpad T460 with external monitors. The device to be used is
Melfas LGD AIT Touch Controller
. This is also a good resource on the topic: wiki.archlinux.org/index.php/Touchscreen– VladJul 2, 2020 at 14:53 -
I saw that the elantech device gets different
id:
each boot, so I've ended up with a little helper script: gist.github.com/erm3nda/3eda9fbcb7a1c18dc91990f1d306c512.– m3ndaJul 24, 2020 at 22:42
Very hard to find solution but actually pretty straight forward, just follow the answer from 'phnomic' here: Touchscreen and additional external monitor. Works flawless with my Fujitsu T730 with all kinds of external monitors!
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2This uses xsetwacom, which I presume only works for Wacom devices? However there is a generic
xinput map-to-output <device> <output>
which is similar in spirit. May 10, 2013 at 2:35 -
@m3nda you're replying to a comment made over 7 years ago, when there was only the 2011 answer and this one. I'll delete the comment I made back then to avoid further confusion, I imagine many better solutions exist nowadays.– TomasJul 27, 2020 at 7:10
Have you tried using xinput-calibrator?
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7
xinput-calibrator
did not help me. It spanned across the entire display space, which is not all accessible on my setup. I tried manually setting calibration values to the size and position of the touchscreen but it had no effect. The answers usingxinput map-to-output
were easier and more helpful. Dec 26, 2017 at 3:38
At least for Wacom touchscreens, there is the additional issue that they stop working after a suspend-and-resume cycle. So they first have to be attached again and then calibrate for dual monitor usage. Here is a solution that does both:
Create (and then test) a custom
systemd
service to re-attach your touchscreen when the system comes back from suspend, using my other answer here.Create a script
/usr/local/bin/local-touchscreen-tweaks
with the following content:#!/usr/bin/env bash # We need to sleep about 2 seconds after the start of the wacom-inputattach # service, or the touchscreen device will not yet be there to work with. sleep 2 # xsetwacom needs to connect to an X server. export XAUTHORITY=/home/matthias/.Xauthority export DISPLAY=:0 # Tell the touch devices to interpret input relative to the physical # touchscreen display only, here LVDS-1. Needed in multi-monitor setups. # Use device names as seen in `xinput --list`. xsetwacom set "Wacom Serial Penabled 2FG Touchscreen Pen stylus" MapToOutput LVDS-1 xsetwacom set "Wacom Serial Penabled 2FG Touchscreen Pen eraser" MapToOutput LVDS-1 xsetwacom set "Wacom Serial Penabled 2FG Touchscreen Finger touch" MapToOutput LVDS-1
Set up your desktop environment to execute that script when X starts, for example via the autostart mechanism. It would be better to do that via
systemd
service, but I did not yet try this.Create the following custom service, used to execute your script when the system returns from resume. It runs after service
restart-wacom-inputattach
created in step 1 above, using the mechanism demonstrated here. For that, create a file/etc/systemd/system/local-touchscreen-tweaks.service
with this content:[Unit] Description=calibrate the touchscreen for dual-monitor usage After=restart-wacom-inputattach.service [Service] User=root Type=oneshot ExecStart=/usr/local/bin/local-touchscreen-tweaks TimeoutSec=0 StandardOutput=syslog [Install] WantedBy=suspend.target
Enable your new custom service with:
sudo systemctl enable /etc/systemd/system/local-touchscreen-tweaks.service
I ran into a similar issue. I switch between using 2 and 4 touch screen monitors, all of which show the exact same name and changing device ID's, making all of the solutions I found pretty much useless. So, I wrote my own script. It captures the the ID's using xinput and the xrandr to capture the available displays. If you don't have Yad installed, it will attempt to install it.
It then uses Yad to popup a confirmation box in the corners of your monitors. Click ok, if the click does not hit the 'OK', it assumes your display and touch inputs are mismatched and attempts to match to the next until you actually hit 'OK'. Then it moves on to the next monitor.
This has to be ran everytime I log in, whether it's a reboot or my system was locked, but I set mine to run when I hit win+f (F for fix my crap), so it's pretty quick and painless to reset everything. I've yet to find a way to make it persistent. I also keep the code on git-hub. Any updates I make, I will post there (https://github.com/pvtcompyle/set-touch). If anyone can think of a way to make this kind of setup persistent, I would love to hear about it!
#!/bin/bash
# This script requires yad to be installed. If it is not installed, run:
# sudo apt install yad
# check for yad installation
monkg -l "yad"
if [ $? = '1' ]
then
printf "Yad is not installed"
sudo apt install yad
fi
# run xinput and find the search text for your touch screens, then set it below
screenSearch="Touch"
# run xrandr and find the search text for your monitors, then set it below
monintorSearch="DisplayPort-"
# dump xinput id's xrandr monitor searches into arrays
idArr=($(xinput | grep $screenSearch | awk '{gsub("id=",""); print $7}'))
monArr=($(xrandr | grep -E "$monintorSearch[0-9] connected" | awk -F '[-" "]' '{print $2}'))
cdate=($(date -I'seconds'))
# these are x and y coordinates to place pop-up alerts.
# adjust for your preference, screen resolution, and number of monitors.
# if fewer monitors are detected than are defined here, it's ok.
# to find your coordinates run the following from a terminal:
# yad --posx=<number> --posy=<number>
monx=(1620 2120 1620 2120)
mony=(880 880 1180 1180)
# loop through monitors.
for mon in "${monArr[@]}"
do
index=0
declare -i mon
# loop through touch screen id's
for id in "${idArr[@]}"
do
declare -i id
xinput map-to-output $id $monintorSearch$mon
# pop up box at monx and mony coordinates. Tap OK, if it's registered on the wrong screen, it will prompt again.
yad --posx=${monx[$mon]} --posy=${mony[$mon]} --close-on-unfocus --title="stuff" --text="Matching input: $id to Monitor: $mon."
result=$?
case $result in
0)
idArr=(${idArr[@]/$id})
break
;;
252)
((index=index+=1))
;;
*)
echo 'Unknown input' $result
;;
esac
done
done