Buttons do not react anymore on touch screen after qt upgrade

[JoeCFD]

I have a few buttons on a tab widget and they worked fine when they were pressed by touch or mouse clicks. After a Qt upgrade to 5.9 from 5.5, non of them reacts anymore when pressed by touch and mouse click. Nothing is changed in the code. What is wrong?

[sierdzio]

Can you share some code? Which operating system this happens on? Have you tried with newer Qt version? Is this some kind of embedded device / mobile? QtQuick or QtWidgets?

[J.Hilk]

@joecfd to add to @sierdzio , can you reproduce this on a minimal ui example or is it with your project only?

[JoeCFD]

@sierdzio It is Ubuntu 18.04.3 LTS. The code is too big for share, sorry. Qt upgrade was made automatically by upgrade of Ubuntu to 18 from 16. Some kind of embedded device. QtWidgets are used. It is hard to debug this problem. Any help will be appreciated.

[Pablo J. Rogina]

@joecfd said in Buttons do not react anymore on touch screen after qt upgrade:

Qt upgrade was made automatically by upgrade of Ubuntu to 18 from 16

It looks like not only Qt was update, but the whole OS as well.

1. Can you confirm?

If so, it could be the chance you need to re-configure the touch display again (drivers, settings, etc.)

2. Have you tested the touch screen with some other program/utility (not Qt-based) and confirm it's working fine after such OS update?

[JoeCFD]

@pablo-j-rogina Very good point. True the whole OS is upgraded. I will check that out. Thanks a lot for your help.

[JoeCFD]

Added a new driver from the manufacturer. No help. It seems a focus issue again since some buttons work and most do not.