SUMMARY STEPS TO REPRODUCE Try to launch Wwin via terminal EXPECTED RESULT Kwin should start ACTUAL RESULT Kwin doesn't start, doesn't report errors, and uses 100% CPU SOFTWARE VERSIONS (available in About System) KDE Plasma Version: N/A (running on Xfce) KDE Frameworks Version: Kwin v. 5.12.6 Qt Version: 5.9.5 ADDITIONAL INFORMATION Following no particular event or configuration that I can remember, I am all of a sudden unable to run Kwin. When I try to start it, it starts using 100% CPU and hangs with me having no window manager. In addition, I'm unable to kill the process with "killall kwin", and I actually have to look up the pid and do "kill -9". I tried purging and re-installing, to no avail, even after removing ~/.kde/. What could be the cause, or a way to figure out what it's doing..? The terminal doesn't print ANYTHING, it just hangs. The same thing happens if I create a brand-new user and try to start Kwin from a brand-new session.
when it is hanging please switch to a tty and run sudo gdb --pid `pidof kwin_x11` then when it's connected type "bt" to get a backtrace and put it here.
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!
This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now 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 Thank you for helping us make KDE software even better for everyone!