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I'm having some problems with Google Chrome and my touchscreen in Ubuntu 14.04.

Basic touchscreen usage works fine, but if I double-tap on the touchscreen (the gesture for a right-click, as far as I can tell), then every time I touch the screen after that, it acts as if I've right-clicked.

This problem appears to be unique to Chrome; xterm, for example, acts normally.

Any suggestions?

Is there a way to get touchscreen events to act identically to mouse events? For example, I found where I can disable touch events (using chrome://flags/#touch-events), but that completely disables tap for left click.

Is anyone successfully using a touchscreen with Google Chrome in Ubuntu 14.04? (I'm working on this for a kiosk-style setup, so I'm using Ubuntu Server and nodm instead of Unity or another desktop shell, and my hardware's a little unusual also.)

Josh Kelley
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    I'm running full Ubuntu 14.04 with normal hardware, but having exactly the same problem. – Olli Feb 09 '15 at 15:35
  • Have you tried using xev to see what the actions end up as, don't know how it works for touch though. See www.x.org/archive/X11R7.7/doc/man/man1/xev.1.xhtml – DaveM Jun 18 '15 at 16:23
  • @DaveM - We tried xev and couldn't see anything that would indicate the problem. – Josh Kelley Jun 22 '15 at 14:03
  • @JoshKelley you likely need to run it before and after the problem arises, so as to get the base point and the fault. Otherwise I see you have a solution – DaveM Jun 23 '15 at 18:59

2 Answers2

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There are at least one possible solution that worked for me. :)

That problem could be solved for me with Chrome's --touch-devices command line parameter.

Determine X's input device id in a console by

xinput list

leading to

google-chrome --touch-devices=10

on my system.

To make Chrome always use this CLI flag, see:

How to set CLI flags for Google Chrome?

Chrome + Touchscreen + Unity (14.04)

Community
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aGer
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  • We'd stumbled on --touch-devices while investigating another issue and didn't realize it could help here as well. I'm not in a position right now to test if this fixes the problems we were having, but it makes sense; thanks. – Josh Kelley Jun 22 '15 at 13:51
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This issue is very elusive for me so I'm not sure if my current fix will actually stay fixed. But what I did was to comment out any occurrence of Option "SoftButtonAreas" in /usr/share/X11/xorg.conf.d/50-synaptics.conf. However, this is not the way to do it. Rather I should override this file in something like /etc/X11/xorg.conf.d/my-synaptics.conf. I'll reboot and see if that breaks it again...

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worldsayshi
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