SUMMARY In OBS Studio and Chromium at least, sometimes I get a stuttering where the contents of the window seem to alternate between two frames several times before using two new frames to stutter on. When the system is in this state, the only way to recover a smooth output of the contents of the window is when I attempt to drag the window. As long as I hold down the left mouse button, the window content is smooth. When I stop dragging, it stutters again. I can also recover when I close the stuttering application and restart it. Since this is hard to describe in words, I have uploaded a video: https://www.youtube.com/watch?v=9rIKkQ7J-VQ I'm using Xorg on an AMD RX 5700 XT using the open source driver, kernel 5.16.0-051600-generic. I'd be willing to test on the new upcoming release if I find a way to install it on Ubuntu. STEPS TO REPRODUCE 1. Notice stuttering 2. Drag window and see whether stuttering stops as long as the mouse button is pressed 2. Stop dragging the window and the stuttering starts again instantly. OBSERVED RESULT Stuttering when not dragging a window. EXPECTED RESULT No stuttering SOFTWARE/OS VERSIONS Linux/KDE Plasma: KUbuntu 21.10 (available in About System) KDE Plasma Version: 5.22.5 KDE Frameworks Version: 5.86.0 Qt Version: 5.12.2
Notice that also the volume bar in the obs window stutters in the video. Chromium stuttered when displaying text and scrolling in it.
kwin --replace also fixes the issue temporarily
I've updated KDE using the PPA, and the problem is still appearing SOFTWARE/OS VERSIONS Linux/KDE Plasma: KUbuntu 21.10 KDE Plasma Version: 5.23.5 KDE Frameworks Version: 5.90 Qt Version: 5.12.2 When the problem appeared, I have left all compositor settings on default. Yesterday I've chagned VSync to Complete repainting and I have yet to see the issue.
With complete repainting the issue still appears sometimes. I've selected "Reuse Screen content" and the stutter disappeared, however, this might be due to a reload because of the changed setting.
If some window starts stuttering, does it affect other running applications? Do you set any x11 environment variables that could affect frame scheduling, e.g. KWIN_X11_NO_SYNC_TO_VBLANK, etc? Can you also get kwin's logs when that issue happens? https://community.kde.org/KWin/Debugging#Getting_debug_log_output
AFAIK there is no special X11 related environment variable set. As far as I remember, not all applications are affected when one is affected. I probably can get logs, but it will take a few days or even weeks because I've returned the computer to the vendor for repair because of some problems. I plan to update before I do it so that I can test with the latest release on the PPA.
Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please mark the bug as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone!
Some more information: It happened again, but it seems to be rarer than last time. Since then I've upgraded KDE. I'm using Plasma 5.24.1 KDE Framework 5.91.0 Qt 5.15.2 kwin -v Warning: Setting a new default format with a different version or profile after the global shared context is created may cause issues with context sharing. kwin 5.24.1 Note that I've added timestamps. I've cut the log soon after I noticed, so one of the latest entries could be related to the issue. [2022-02-17 16:18:13] kwin_core: XCB error: 152 (BadDamage), sequence: 7568, resource id: 137540041, major code: 143 (DAMAGE), minor code: 3 (Subtract) [2022-02-17 16:29:41] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 27334, resource id: 50339835, major code: 15 (QueryTree), minor code: 0 [2022-02-17 16:30:03] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 25346, resource id: 140514300, major code: 15 (QueryTree), minor code: 0 [2022-02-17 16:30:04] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 31362, resource id: 140514353, major code: 15 (QueryTree), minor code: 0 [2022-02-17 16:30:07] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 55377, resource id: 140512510, major code: 15 (QueryTree), minor code: 0 [2022-02-17 16:30:09] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 2839, resource id: 140512440, major code: 15 (QueryTree), minor code: 0 [2022-02-17 16:30:10] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 6391, resource id: 140512383, major code: 15 (QueryTree), minor code: 0 [2022-02-17 16:30:51] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 56254, resource id: 50339851, major code: 15 (QueryTree), minor code: 0 [2022-02-17 16:33:39] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 64869, resource id: 50339867, major code: 19 (DeleteProperty), minor code: 0 [2022-02-17 16:33:39] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 64872, resource id: 50339867, major code: 19 (DeleteProperty), minor code: 0 [2022-02-17 16:33:39] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 64873, resource id: 50339867, major code: 18 (ChangeProperty), minor code: 0 [2022-02-17 16:33:39] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 64874, resource id: 50339867, major code: 19 (DeleteProperty), minor code: 0 [2022-02-17 16:33:39] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 64875, resource id: 50339867, major code: 19 (DeleteProperty), minor code: 0 [2022-02-17 16:33:39] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 64876, resource id: 50339867, major code: 19 (DeleteProperty), minor code: 0 [2022-02-17 16:33:39] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 64877, resource id: 50339867, major code: 7 (ReparentWindow), minor code: 0 [2022-02-17 16:33:39] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 64878, resource id: 50339867, major code: 6 (ChangeSaveSet), minor code: 0 [2022-02-17 16:33:39] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 64879, resource id: 50339867, major code: 2 (ChangeWindowAttributes), minor code: 0 [2022-02-17 16:33:39] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 64880, resource id: 50339867, major code: 10 (UnmapWindow), minor code: 0 [2022-02-17 16:38:32] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 16147, resource id: 140511785, major code: 15 (QueryTree), minor code: 0 [2022-02-17 16:38:38] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 54602, resource id: 140510993, major code: 15 (QueryTree), minor code: 0 [2022-02-17 16:38:40] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 7169, resource id: 50340041, major code: 19 (DeleteProperty), minor code: 0 [2022-02-17 16:38:40] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 7182, resource id: 50340041, major code: 19 (DeleteProperty), minor code: 0 [2022-02-17 16:38:40] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 7183, resource id: 50340041, major code: 18 (ChangeProperty), minor code: 0 [2022-02-17 16:38:40] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 7184, resource id: 50340041, major code: 19 (DeleteProperty), minor code: 0 [2022-02-17 16:38:40] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 7185, resource id: 50340041, major code: 19 (DeleteProperty), minor code: 0 [2022-02-17 16:38:40] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 7186, resource id: 50340041, major code: 19 (DeleteProperty), minor code: 0 [2022-02-17 16:38:40] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 7187, resource id: 50340041, major code: 7 (ReparentWindow), minor code: 0 [2022-02-17 16:38:40] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 7188, resource id: 50340041, major code: 6 (ChangeSaveSet), minor code: 0 [2022-02-17 16:38:40] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 7189, resource id: 50340041, major code: 2 (ChangeWindowAttributes), minor code: 0 [2022-02-17 16:38:40] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 7190, resource id: 50340041, major code: 10 (UnmapWindow), minor code: 0 [2022-02-17 16:40:39] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 20057, resource id: 167772165, major code: 18 (ChangeProperty), minor code: 0 [2022-02-17 16:40:39] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 20062, resource id: 167772166, major code: 18 (ChangeProperty), minor code: 0 [2022-02-17 16:40:39] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 20066, resource id: 167772167, major code: 18 (ChangeProperty), minor code: 0 [2022-02-17 16:40:47] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 60462, resource id: 167772216, major code: 15 (QueryTree), minor code: 0 [2022-02-17 16:41:17] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 39881, resource id: 167772164, major code: 18 (ChangeProperty), minor code: 0 [2022-02-17 16:41:17] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 40048, resource id: 167772165, major code: 18 (ChangeProperty), minor code: 0 [2022-02-17 16:41:17] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 40526, resource id: 50340078, major code: 18 (ChangeProperty), minor code: 0 [2022-02-17 16:41:17] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 40639, resource id: 50340079, major code: 18 (ChangeProperty), minor code: 0 [2022-02-17 16:42:58] kwin_core: XCB error: 14 (BadIDChoice), sequence: 25689, resource id: 137783886, major code: 138 (XFIXES), minor code: 5 (CreateRegion) [2022-02-17 16:42:58] kwin_core: XCB error: 140 (Unknown), sequence: 25690, resource id: 137783886, major code: 143 (DAMAGE), minor code: 3 (Subtract) [2022-02-17 16:42:58] kwin_core: XCB error: 140 (BadRegion), sequence: 25691, resource id: 137783886, major code: 138 (XFIXES), minor code: 19 (FetchRegion) [2022-02-17 16:42:58] kwin_core: XCB error: 140 (BadRegion), sequence: 25692, resource id: 137783886, major code: 138 (XFIXES), minor code: 10 (DestroyRegion) Note that albeit the flickering is continuing on, there is no additional messages in the log. So no continous spamming of the log or similar is happening. There does not seem to be any Xorg log file on my system unfortunately (last changed 14th January). If Teams screen capture worked properly on Wayland, I could test on this, but as of now I am stuck to Xorg. Just like last time, restarting kwin resolved the issue temporarily. I've also reset the status of the bug to reported so that it does not closed automatically. I hope this is the correct thing to do.
I'll also attach the start of the log after restarting kwin; maybe it shows some interesting version information or something. Interestingly, I get these XCB errors right from the start, so these seem rather common. [2022-02-17 16:56:09] Warning: Setting a new default format with a different version or profile after the global shared context is created may cause issues with context sharing. [2022-02-17 16:56:09] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 180, resource id: 136314899, major code: 20 (GetProperty), minor code: 0 [2022-02-17 16:56:09] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 181, resource id: 136314899, major code: 20 (GetProperty), minor code: 0 [2022-02-17 16:56:09] kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5089:46: this compose sequence is a duplicate of another; skipping line [2022-02-17 16:56:09] kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5091:48: this compose sequence is a duplicate of another; skipping line [2022-02-17 16:56:09] kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5093:48: this compose sequence is a duplicate of another; skipping line [2022-02-17 16:56:09] kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5097:47: this compose sequence is a duplicate of another; skipping line [2022-02-17 16:56:09] kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5099:46: this compose sequence is a duplicate of another; skipping line [2022-02-17 16:56:09] kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5107:48: this compose sequence is a duplicate of another; skipping line [2022-02-17 16:56:09] kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5111:46: this compose sequence is a duplicate of another; skipping line [2022-02-17 16:56:09] kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5113:46: this compose sequence is a duplicate of another; skipping line [2022-02-17 16:56:09] kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5117:45: this compose sequence is a duplicate of another; skipping line [2022-02-17 16:56:09] kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5120:46: this compose sequence is a duplicate of another; skipping line [2022-02-17 16:56:09] OpenGL vendor string: AMD [2022-02-17 16:56:09] OpenGL renderer string: AMD Radeon RX 5700 XT (NAVI10, DRM 3.44.0, 5.17.0-051700rc1daily20220128-generic, LLVM 12.0.1) [2022-02-17 16:56:09] OpenGL version string: 4.6 (Compatibility Profile) Mesa 21.2.6 [2022-02-17 16:56:09] OpenGL shading language version string: 4.60 [2022-02-17 16:56:09] Driver: RadeonSI [2022-02-17 16:56:09] GPU class: Navi [2022-02-17 16:56:09] OpenGL version: 4.6 [2022-02-17 16:56:09] GLSL version: 4.60 [2022-02-17 16:56:09] Mesa version: 21.2.6 [2022-02-17 16:56:09] X server version: 1.20.13 [2022-02-17 16:56:09] Linux kernel version: 5.17 [2022-02-17 16:56:09] Requires strict binding: yes [2022-02-17 16:56:09] GLSL shaders: yes [2022-02-17 16:56:09] Texture NPOT support: yes [2022-02-17 16:56:09] Virtual Machine: no [2022-02-17 16:56:10] kwin_core: XCB error: 10 (BadAccess), sequence: 10846, resource id: 1740, major code: 142 (Composite), minor code: 2 (RedirectSubwindows) [2022-02-17 16:56:10] qt.qpa.xcb: QXcbConnection: XCB error: 9 (BadDrawable), sequence: 10960, resource id: 50340160, major code: 14 (GetGeometry), minor code: 0 [2022-02-17 16:56:11] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 18242, resource id: 140515271, major code: 18 (ChangeProperty), minor code: 0 [2022-02-17 16:56:11] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 18491, resource id: 140515278, major code: 18 (ChangeProperty), minor code: 0 [2022-02-17 16:56:13] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 30291, resource id: 140515282, major code: 18 (ChangeProperty), minor code: 0 [2022-02-17 16:57:46] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 37957, resource id: 136334405, major code: 3 (GetWindowAttributes), minor code: 0 [2022-02-17 16:57:46] qt.qpa.xcb: QXcbConnection: XCB error: 9 (BadDrawable), sequence: 37958, resource id: 136334405, major code: 14 (GetGeometry), minor code: 0 [2022-02-17 16:57:46] qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 37961, resource id: 136334405, major code: 3 (GetWindowAttributes), minor code: 0 [2022-02-17 16:57:46] qt.qpa.xcb: QXcbConnection: XCB error: 9 (BadDrawable), sequence: 37962, resource id: 136334405, major code: 14 (GetGeometry), minor code: 0
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
I have deduced that there is no additional entry in ~/.xsession-errors when this happens, because it happened again and this log file still looks the same. The kwin log gets new entries sometimes though.
BadDamage should be fixed in 5.26 *** This bug has been marked as a duplicate of bug 456511 ***