I play Steam games without issues until last openSUSE (or Steam?) update. After
udpate games freezing, crashing kinit and breaking window decorations. I am not
sure, but I am suspicious that latest KF 5.20 caused problems.

My system:
1) openSUSE Leap with KDE
2) AMD Radeon 6870 with Mesa drivers - tested both original and updated from
Xorg OBS repository

How to reproduce:
1) Update openSUSE Leap to newest version
2) Run Steam and run some fullscreen game like HalfLife2, Left 4 Dead 2, X3,
...
3) Game often freezes and kinit throws an error

Workaround:
1) With disabled compositor via ALT+SHIFT+F12 works good


Error:
Application: kdeinit5 (kdeinit5), signal: Aborted
Using host libthread_db library "/lib64/libthread_db.so.1".
[KCrash Handler]
#4 0x00007f7b7e5e30a7 in raise () at /lib64/libc.so.6
#5 0x00007f7b7e5e4458 in abort () at /lib64/libc.so.6
#6 0x00007f7b7e620764 in () at /lib64/libc.so.6
#7 0x00007f7b7e625fce in malloc_printerr () at /lib64/libc.so.6
#8 0x00007f7b7e626ce6 in _int_free () at /lib64/libc.so.6
#9 0x00007f7b7f9af026 in xcb_disconnect () at /usr/lib64/libxcb.so.1
#10 0x00007f7b6d9eabd5 in () at /usr/lib64/libkdeinit5_klauncher.so
#11 0x00007f7b6d9eac55 in () at /usr/lib64/libkdeinit5_klauncher.so
#12 0x00007f7b6d9efe73 in () at /usr/lib64/libkdeinit5_klauncher.so
#13 0x00007f7b6d9f724b in () at /usr/lib64/libkdeinit5_klauncher.so
#14 0x00007f7b7ec0ccc6 in QMetaObject::activate(QObject*, int, int, void**) ()
at /usr/lib64/libQt5Core.so.5
#15 0x00007f7b7ec8e8ee in QSocketNotifier::activated(int,
QSocketNotifier::QPrivateSignal) () at /usr/lib64/libQt5Core.so.5
#16 0x00007f7b7ec19a89 in QSocketNotifier::event(QEvent*) () at
/usr/lib64/libQt5Core.so.5
#17 0x00007f7b7ebdd18d in QCoreApplication::notify(QObject*, QEvent*) () at
/usr/lib64/libQt5Core.so.5
#18 0x00007f7b7ebdce95 in QCoreApplication::notifyInternal(QObject*, QEvent*)
() at /usr/lib64/libQt5Core.so.5
#19 0x00007f7b7ec31743 in QEventDispatcherUNIX::activateSocketNotifiers() () at
/usr/lib64/libQt5Core.so.5
#20 0x00007f7b7ec31beb in
QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop:ProcessEventsFlag>,
timespec*) () at /usr/lib64/libQt5Core.so.5
#21 0x00007f7b7ec31f3b in
QEventDispatcherUNIX:ProcessEvents(QFlags<QEventLoop:ProcessEventsFlag>) () at
/usr/lib64/libQt5Core.so.5
#22 0x00007f7b6d59933d in () at /usr/lib64/libQt5XcbQpa.so.5
#23 0x00007f7b7ebdad53 in
QEventLoop::exec(QFlags<QEventLoop:ProcessEventsFlag>) () at
/usr/lib64/libQt5Core.so.5
#24 0x00007f7b7ebe28f6 in QCoreApplication::exec() () at
/usr/lib64/libQt5Core.so.5
#25 0x00007f7b6d9f4a1a in kdemain () at /usr/lib64/libkdeinit5_klauncher.so
#26 0x00000000004086fc in _start ()[/QUOTE]