This combination worked (for single press only, no multitouch
obviously):

Preferences->Keyboard->Advanced->"Touch input"="none"
Preferences->Keyboard->Advanced->"Input event source"="GTK"

Setting "Touch Input" back to "Multitouch" I get this error:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/Onboard/TouchInput.py", line 538, in 
_on_button_press_event
    self._can_handle_pointer_event(event),
  File "/usr/lib/python3/dist-packages/Onboard/TouchInput.py", line 526, in 
_can_handle_pointer_event
    not device.touch_active
AttributeError: 'X11DeviceXI2' object has no attribute 'touch_active'

For KWin vs KDE, I meant to edit my original statement, I tried it with
KDE and then Gnome and had the same behaviour. My setup is KWin
standalone.

I am also very familiar with that SYNA7500 thread haha. The SYNA7500 is
an i2c device, not USB. I have to use this kernel for the moment because
I do have another device which uses a different touchscreen (ELAN), that
has the same behaviour. However I know that this device worked fine in
the past, so I think this points to something that changed in the
touchscreen driver for the kernel build that I am using.

Thanks for the quick feedback, I think I need to look at the touch
driver as well.

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to onboard in Ubuntu.
https://bugs.launchpad.net/bugs/1470825

Title:
  Onboard focus with KWin

Status in onboard package in Ubuntu:
  New

Bug description:
  Customized Ubuntu 15.04, running KWin via an .xsession call. Using
  Onboard for on-screen keyboard. The keyboard won't get focus unless I
  tap on it twice (or unless I drag into the keyboard, and then tap it).
  In my previous environment I used Compiz and didn't have this
  behaviour, nor do I see it with any other window type.

  Turning debugging on for Onboard it seems to be getting the touch
  events so I am not sure why its not getting focus. Its output for
  example would be:

  Code: Select all
  19:23:08.392 EVENT   TouchInput            Source device: XIDevice(id=13 
attachment=2 use=3 touch_mode=1 source=GDK_SOURCE_TOUCHSCREEN name=SYNA7500:00 
06CB:3AF0 vendor=0x06cb product=0x3af0 enabled=1)
  19:23:08.392 EVENT   TouchInput            _on_device_event1
  19:23:08.393 EVENT   TouchInput            _on_device_event2 2 2
  19:23:08.393 EVENT   TouchInput            _on_device_event7 1
  19:23:08.393 EVENT   TouchInput            _on_device_event8 True
  19:23:08.393 EVENT   TouchInput            _on_device_event10 20971528 
20971707
  19:23:08.393 EVENT   TouchInput            _on_device_event11
  19:23:08.394 EVENT   TouchInput            Device event: dev_id=2 src_id=2 
xi_type=7 xid_event=20971528(20971707) x=171.0 y=45.0 x_root=1642.0 
y_root=405.0 button=0 state=0 sequence=0

  
  A little lost and looking for any suggestions!

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