В письме от среда, 1 апреля 2020 г. 15:10:50 MSK пользователь mcpain@basealt.ru написал: > Also reproducible on: > Fedora 29 (MATE) > Ubuntu 19.10 (MATE) > _______________________________________________ > x2go-dev mailing list > x2go-dev@lists.x2go.org > https://lists.x2go.org/listinfo/x2go-dev When QCoreApplicationPrivate::maybeQuit() is called, quitLockRef.load() == 0, hence QEvent::Quit is sent on MATE and application terminates. KDE is fine because there is plasma-integration package, which provides KDEPlatformSystemTrayIcon and quitLockRef.load() != 0 when maybeQuit() is called. Took a look at other Qt5 applications like Psi+ and made a patch with similar workaround.