Public bug reported:
When using a touchscreen with an external monitor connected and an
extended desktop, touches on the touchscreen are placed relative to the
entire extended desktop, not the part that corresponds to the
touchscreen.
Release: Lubuntu 15.10
Version: 0.62
What I expect to happen: Touching the touchscreen registers a touch at
the location it was touched.
What happens instead: Touching the touchscreen registers a touch
somewhere else, relative to the overall space of the extended desktop,
rather than the touchscreen.
Specifically, if the touchscreen runs from coordinates (0,0) to (x,y),
the extended desktop runs from coordinates (0,0) to (X,Y), and the
screen is touched at location (a,b), then the touch is registered at
(a*X/x,b*Y/y) rather than at (a,b).
For instance, when using two 1920x1080 displays, one of which is a
touchscreen to the left of the external monitor, touching the
touchscreen in its center will cause the mouse cursor to move to the far
right of the touchscreen (the center of the overall workspace), not to
the center of the touchscreen itself which comprises only half of the
workspace.
A minor bug since nobody really does this, but I figured I'd report it.
** Affects: lubuntu-meta (Ubuntu)
Importance: Undecided
Status: New
** Tags: multidisplay touchscreen
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https://bugs.launchpad.net/bugs/1535495
Title:
Touchscreen coordinates mapped incorrectly with multiple displays
(LXDE/Lubuntu)
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