I see there is crash in xi2ProcessTouch

Krish89

Hello Everyone,

I have display which I change the brightness and brightness dim from 100 to 0 at certain Timeout display brightness will reduce to Dim value.
When I set the dim value to 0 and I launch any Qt application I see there is a crash
In short when display turns off I detach the touch and when there is a touch reattach the touch to avoid the touch event to follow the application, I just want the touch to wake up.

I see there is a crash after second touch and from gdb I got these logs. If any face the similar issue please let me know your help is more useful.

Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x74e5c196 in QXcbConnection::xi2ProcessTouch(void*, QXcbWindow*) () from /usr/lib/libQt5XcbQpa.so.5
[Current thread is 1 (Thread 0x76ede8a0 (LWP 2210))]

Axel Spoerl

Hi @Krish89 and welcome to the Qt Forum,
the crash happens in Qt5, which is EOL and no longer maintained.
Can you try Qt6 (e.g. 6.8) instead? I am asking because the XCB implementation was improved in Qt6, so there is a chance that this has already been fixed.
Cheers
Axel