https://bugs.kde.org/show_bug.cgi?id=449301
--- Comment #10 from Marc M. <marcmiltenber...@gmail.com> --- This time it happened with OBS Studio again. this is kwins output around that time: [2022-02-18 19:31:30] kwin_core: XCB error: 14 (BadIDChoice), sequence: 58265, resource id: 187077054, major code: 138 (XFIXES), minor code: 5 (CreateRegion) [2022-02-18 19:31:30] kwin_core: XCB error: 140 (Unknown), sequence: 58266, resource id: 187077054, major code: 143 (DAMAGE), minor code: 3 (Subtract) [2022-02-18 19:31:30] kwin_core: XCB error: 140 (BadRegion), sequence: 58267, resource id: 187077054, major code: 138 (XFIXES), minor code: 19 (FetchRegion) [2022-02-18 19:31:30] kwin_core: XCB error: 140 (BadRegion), sequence: 58268, resource id: 187077054, major code: 138 (XFIXES), minor code: 10 (DestroyRegion) [2022-02-18 19:31:36] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 36085, resource id: 193361815, major code: 15 (QueryTree), minor code: 0 [2022-02-18 19:31:39] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 59162, resource id: 193363407, major code: 15 (QueryTree), minor code: 0 Here a part of ~/.xsession-errors. Unfortunately, I have no timestamps so I do not know how far back this goes, so I cut rather more than less. qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 32304, resource id: 37749081, major code: 20 (GetProperty), minor code: 0 qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 32305, resource id: 37749081, major code: 15 (QueryTree), minor code: 0 qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 32385, resource id: 37749084, major code: 19 (DeleteProperty), minor code: 0 qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 32388, resource id: 37749084, major code: 19 (DeleteProperty), minor code: 0 qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 32389, resource id: 37749084, major code: 18 (ChangeProperty), minor code: 0 qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 32390, resource id: 37749084, major code: 19 (DeleteProperty), minor code: 0 qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 32391, resource id: 37749084, major code: 19 (DeleteProperty), minor code: 0 qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 32392, resource id: 37749084, major code: 19 (DeleteProperty), minor code: 0 qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 32393, resource id: 37749084, major code: 7 (ReparentWindow), minor code: 0 qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 32394, resource id: 37749084, major code: 6 (ChangeSaveSet), minor code: 0 qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 32395, resource id: 37749084, major code: 2 (ChangeWindowAttributes), minor code: 0 qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 32396, resource id: 37749084, major code: 10 (UnmapWindow), minor code: 0 qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 32515, resource id: 37749087, major code: 15 (QueryTree), minor code: 0 Could not attach Keys property to: PlasmaQuick::Dialog(0x5563eb22fa60) is not an Item qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 44711, resource id: 37749157, major code: 20 (GetProperty), minor code: 0 qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 44712, resource id: 37749157, major code: 15 (QueryTree), minor code: 0 qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 45595, resource id: 29363760, major code: 20 (GetProperty), minor code: 0 kdeinit5: Got EXEC_NEW '/usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/kio/file.so' from launcher. kdeinit5: preparing to launch '/usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/kio/file.so' powerdevil: Scheduling inhibition from ":1.105" "firefox" with cookie 3 and reason "video-playing" powerdevil: Releasing inhibition with cookie 3 powerdevil: It was only scheduled for inhibition but not enforced yet, just discarding it powerdevil: Enforcing inhibition from ":1.105" "firefox" with cookie 3 and reason "video-playing" powerdevil: By the time we wanted to enforce the inhibition it was already gone; discarding it qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 35636, resource id: 37749172, major code: 20 (GetProperty), minor code: 0 qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 35637, resource id: 37749172, major code: 15 (QueryTree), minor code: 0 ApportEvent :: hidden= false apport-kde= true apport-gtk= true Using ApportEvent "" foundCrashFile false foundAutoUpload false KDE Languages: () ("de_DE.UTF-8", "de", "_DE", "DE", ".UTF-8", "UTF-8", "", "") System Language Matchables: ("de_DE", "de") kdeinit5: PID 6810 terminated. kdeinit5: PID 6813 terminated. kdeinit5: PID 6791 terminated. kdeinit5: PID 6814 terminated. QObject::startTimer: Timers cannot be started from another thread QObject::startTimer: Timers cannot be started from another thread kdeinit5: PID 7237 terminated. qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 1880, resource id: 146800742, major code: 15 (QueryTree), minor code: 0 klauncher: Exiting on signal 15 QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* bluedevil: Destroyed QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* The X11 connection broke: I/O error (code 1) XIO: fatal IO error 4 (Unterbrechung während des Betriebssystemaufrufs) on X server ":0" after 492795 requests (492795 known processed) with 0 events remaining. The X11 connection broke: I/O error (code 1) XIO: fatal IO error 4 (Unterbrechung während des Betriebssystemaufrufs) on X server ":0" after 492795 requests (492795 known processed) with 0 events remaining. QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* Application::crashHandler() called with signal 11; recent crashes: 1 malloc_consolidate(): invalid chunk size [23:50:43:008][0x1ae6ab0][Warning]:0: The X11 connection broke (error 1). Did the X11 server die? QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule* The X11 connection broke: I/O error (code 1) XIO: fatal IO error 4 (Unterbrechung während des Betriebssystemaufrufs) on X server ":0" after 28 requests (28 known processed) with 0 events remaining. KCrash: crashing... crashRecursionCounter = 2 KCrash: Application Name = kwin_x11 path = /usr/bin pid = 5684 KCrash: Arguments: /usr/bin/kwin_x11 KCrash: Attempting to start /usr/lib/x86_64-linux-gnu/libexec/drkonqi from kdeinit Warning: connect() failed: : Verbindungsaufbau abgelehnt KCrash: Attempting to start /usr/lib/x86_64-linux-gnu/libexec/drkonqi directly -- You are receiving this mail because: You are watching all bug changes.