Application: kwin_x11 (5.19.3) (Compiled from sources) Qt Version: 5.15.0 Frameworks Version: 5.72.0 Operating System: Linux 5.7.8-arch1-1 x86_64 Windowing system: X11 Distribution: "Arch Linux" -- Information about the crash: - What I was doing when the application crashed: Logging in to a test Plasma desktop built from source, using a custom session - Custom settings of the application: KDE Frameworks and Workspace built from source by kdesrc-build on 15 July, into a discrete tree. QT 5.15 not built separately but using /usr/lib installation from my main user set-up. After the crash both monitors are black with a functioning mouse pointer. From a tty log-in, Journalctl shows that the remainder of the Plasma desktop started normally. The X server is still running but attempts to re-start kwin with DISPLAY=0: kwin_x11 fail with a fatal error and unable to open display. pkill -u ... clears the black screens and returns to sddm for graphical log-in. The crash can be reproduced every time. -- Backtrace: Application: KWin (kwin_x11), signal: Segmentation fault [KCrash Handler] #4 0x00007f0b6c7c7144 in xcb_send_request_with_fds64 () at /usr/lib/libxcb.so.1 #5 0x00007f0b6c7c76ba in xcb_send_request () at /usr/lib/libxcb.so.1 #6 0x00007f0b6c7cdfd2 in xcb_intern_atom_unchecked () at /usr/lib/libxcb.so.1 #7 0x00005643ddbe456c in KWin::KWinSelectionOwner::make_selection_atom(int) (this=0x5643de3d57d0, screen_P=0) at /home/hugh_coder2/kde/src/kwin/main_x11.cpp:164 #8 0x00005643ddbe41a9 in KWin::KWinSelectionOwner::KWinSelectionOwner(int) (this=0x5643de3d57d0, screen=0) at /home/hugh_coder2/kde/src/kwin/main_x11.cpp:119 #9 0x00005643ddbe04ae in KWin::ApplicationX11::performStartup() (this=0x7ffec144e1f0) at /home/hugh_coder2/kde/src/kwin/main_x11.cpp:219 #10 0x00005643ddbe1e9d in main(int, char**) (argc=3, argv=0x7ffec144e378) at /home/hugh_coder2/kde/src/kwin/main_x11.cpp:477 [Inferior 1 (process 18456) detached] Possible duplicates by query: bug 414359, bug 403933, bug 364121, bug 363251, bug 349023. Reported using DrKonqi
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