Bug 1159662

run xinput list-props on the touchscreen device please and attach the output here.
what desktop environment are you using? any special configuration files that we should be aware of?

Created attachment 953364 [details]
output of `xinput list-props 13`

Please find attached the requested output.
I'm running KDE, and I'm not aware of any special configuration.
(This is a Precision 3800 with a display resolution of 3200x1800. The external monitor is using 1920x1200.)

This is a KDE problem. By default, absolute devices such as touchscreens map across all monitors in X. it's up to the desktop environment to set the correct mapping for each touchscreen.

Not sure what component in KDE is really responsible for that, reassigning to kdesettings in the hope that's correct enough. sorry guys.

If KDE doesn't currently do this, here's a manual workaround:
https://wiki.archlinux.org/index.php/Calibrating_Touchscreen
xinput in F20 and newer also provides the xinput map-to-output function that makes setting the matrix a lot easier (just check the man page).

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I can confirm that this issue is still present with Fedora 21 KDE.  The workaround Peter linked to does work, however.

Someone with permission will need to update the Version on this bug id from 20 to 21.

And it's still present in Fedora 22, too, FWIW.

triaging to plasma-desktop (where kcm_touchpad lives).

This probably ought to get filed upstream @ bugs.kde.org, preferably someone with the affected hardware.

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This is still present on Fedora 25 KDE.  I use a shell script to work around the problem.

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