I am running Ubuntu Mate 16.04.2 on a Raspi 3. Attached to it is a iiyama ProLite T2452MTS touch screen.
While running this setup as an internet kiosk I have noticed strange behaviour with touch inputs. Every few clicks the release event is not registered correctly which causes the mouse to remain in a pressed state.
I have checked the input via xlist test and verified that the release event is not received correctly. The example output below shows three touches to the screen which were registered as motion since release was missing.
button press 1 a[0]=14705 a[1]=8523 a[2]=157 a[3]=85 a[4]=0
motion a[0]=14689 a[1]=8521
motion a[0]=14689 a[1]=8521 a[2]=156
motion a[0]=14689 a[1]=8521
button release 1 a[0]=14689 a[1]=8521
# Below are three "clicks", registered as one
button press 1 a[0]=14624 a[1]=5336 a[2]=155 a[3]=85 a[4]=0
motion a[0]=14637 a[1]=5341
motion a[0]=14637 a[1]=5341 a[2]=158 a[3]=91
motion a[0]=14593 a[1]=4702
motion a[0]=14593 a[1]=4702 a[2]=158 a[3]=85
motion a[0]=14255 a[1]=8307
motion a[0]=14255 a[1]=8307 a[2]=153 a[3]=92
motion a[0]=14263 a[1]=8304
motion a[0]=14263 a[1]=8304 a[2]=151 a[3]=88
motion a[0]=14903 a[1]=9944
motion a[0]=14903 a[1]=9944 a[2]=155
motion a[0]=14277 a[1]=4645
motion a[0]=14277 a[1]=4645 a[2]=154 a[3]=87
motion a[0]=14266 a[1]=4648
motion a[0]=14266 a[1]=4648 a[2]=155 a[3]=90
motion a[0]=14266 a[1]=4648
button release 1 a[0]=14266 a[1]=4648
The touchscreen works correctly on Windows and on elementaryOS (based on Ubuntu 16.04).
Has anybody experienced the same issue? Any idea what I could do to get this working?
Edit: It looks like if I touch it very fast and make sure that I touch the screen as short as possible the release event gets registered. Is there any timeout or similar that might be set too low?