https://bugs.kde.org/show_bug.cgi?id=457847
Bug ID: 457847 Summary: kwin becomes unresponsive sometimes when starting vscode Product: kwin Version: 5.25.4 Platform: Other OS: Linux Status: REPORTED Severity: normal Priority: NOR Component: general Assignee: kwin-bugs-n...@kde.org Reporter: p...@ralfj.de Target Milestone: --- SUMMARY I apologize in advance for the vague description. I don't know how to reproduce this issue and I don't know how to diagnose it, so I am down to describing symptoms in the hope that they are recognizable to the developers. It happened twice now in the span of 2 days so it is not just a one-off event. The symptoms are as follows: - I start visual studio code. - It doesn't start properly; the main windows remains mostly grey and the little notification boxes it shows in the bottom right corner are just black - I can keep do one alt-tab and interact with that window just fine - When I do another alt-tab the focus doesn't really go to that window any more - Now I am entirely stuck and nothing I do seems to have any effect. I even tried killing kwin from another terminal, no luck. I have to Ctrl-Alt-Backspace. I checked "journalctl" and found only this: Aug 13 12:54:26 r-thinktop systemd[1904]: Started Visual Studio Code. Aug 13 12:54:26 r-thinktop krunner[355566]: Warning: networking feature is disabled in Firejail configuration file Aug 13 12:54:26 r-thinktop krunner[355566]: Reading profile /etc/firejail/whitelist-common.inc Aug 13 12:54:26 r-thinktop krunner[355566]: Reading profile /etc/firejail/whitelist-common.local Aug 13 12:54:26 r-thinktop krunner[355566]: Parent pid 355566, child pid 355575 Aug 13 12:54:26 r-thinktop kwin_x11[218611]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 34689, resource id: 75497860, major code: 18 (ChangeProperty), minor code: 0 Aug 13 12:54:26 r-thinktop krunner[355582]: Child process initialized in 149.98 ms Aug 13 12:54:27 r-thinktop krunner[355614]: [39:0813/125427.287529:ERROR:sandbox_linux.cc(377)] InitializeSandbox() called with multiple threads in process gpu-process. Aug 13 12:54:27 r-thinktop kwin_x11[218611]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 35169, resource id: 17481336, major code: 3 (GetWindowAttributes), minor code: 0 Aug 13 12:54:27 r-thinktop kwin_x11[218611]: qt.qpa.xcb: QXcbConnection: XCB error: 9 (BadDrawable), sequence: 35170, resource id: 17481336, major code: 14 (GetGeometry), minor code: 0 Aug 13 12:54:27 r-thinktop krunner[355582]: [main 2022-08-13T16:54:27.406Z] update#setState idle Aug 13 12:54:29 r-thinktop krunner[355582]: [main 2022-08-13T16:54:29.010Z] Starting extension host with pid 124 (fork() took 11 ms). [...] Aug 13 13:00:23 r-thinktop kwin_x11[218611]: qt.qpa.xcb: QXcbConnection: XCB error: 2 (BadValue), sequence: 1271, resource id: 17494157, major code: 149 (Unknown), minor code: 4 Aug 13 13:00:23 r-thinktop kwin_x11[218611]: qt.qpa.xcb: QXcbConnection: XCB error: 136 (Unknown), sequence: 1274, resource id: 17494158, major code: 148 (Unknown), minor code: 1 Aug 13 13:00:23 r-thinktop kwin_x11[218611]: qt.qpa.xcb: QXcbConnection: XCB error: 2 (BadValue), sequence: 1276, resource id: 17494160, major code: 149 (Unknown), minor code: 4 Aug 13 13:00:23 r-thinktop kwin_x11[218611]: qt.qpa.xcb: QXcbConnection: XCB error: 136 (Unknown), sequence: 1277, resource id: 17494161, major code: 148 (Unknown), minor code: 1 Aug 13 13:01:02 r-thinktop kglobalaccel5[218644]: The X11 connection broke (error 1). Did the X11 server die? Aug 13 13:01:02 r-thinktop kded5[218605]: The X11 connection broke (error 1). Did the X11 server die? Aug 13 13:01:02 r-thinktop ksmserver[218599]: The X11 connection broke (error 1). Did the X11 server die? The "X11 connection broke" are from when I did Ctrl-Alt-Backspace. Before that kwin did show some "XCB error", no idea if those are significant / critical -- but I doubt it, I have similar messages in the log all the time. I am using Debian testing. This started when kwin-x11 got updated from 4:5.24.5-1+b1 to 4:5.25.4-2. SOFTWARE/OS VERSIONS Operating System: Debian GNU/Linux KDE Plasma Version: 5.25.4 KDE Frameworks Version: 5.96.0 Qt Version: 5.15.4 Kernel Version: 5.18.0-3-amd64 (64-bit) Graphics Platform: X11 Processors: 8 × Intel® Xeon® CPU E3-1505M v5 @ 2.80GHz Memory: 31,2 GiB of RAM Graphics Processor: Mesa Intel® HD Graphics P530 Manufacturer: LENOVO Product Name: 20ENCTO1WW System Version: ThinkPad P50 -- You are receiving this mail because: You are watching all bug changes.