SUMMARY This is a problem that started to occur only recently. After rebooting, the activities I have defined (three of them) no longer appear (at least the activity pager widget is not there). Also, the desktop is plain black and no desktop widgets are present anymore. Logging out and in again at least helped for the pager to re-appear, but the desktop settings (e.g. background) were not restored. I needed to re-configure these. STEPS TO REPRODUCE This is difficult to tell, but the problem occurs with a certain regularity (but not always). SOFTWARE/OS VERSIONS Linux/KDE Plasma: Kubuntu 20.04.2 (available in About System) KDE Plasma Version: 5.18.5 KDE Frameworks Version: 5.68.0 Qt Version: 5.12.8 ADDITIONAL INFORMATION
Sounds like Plasma is crashing on login. Can you please get a backtrace of the crash? If DrKonqi didn't do so automatically, you may be able to find it using the command-line `coredumpctl` utility. See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports#Retrieving_a_backtrace_using_coredumpctl
Ok, now it happened again, but I doubt that I see the crashes that caused the problem. In the morning, all was fine despite these dumps. Upon booting in the afternoon, all activities and desktop settings disappeared again. I wonder whether this is related to restoring open applications. $ coredumpctl TIME PID UID GID SIG COREFILE EXE Wed 2021-05-19 08:03:48 CEST 1154 124 133 31 error /lib/systemd/systemd-timesyncd Wed 2021-05-19 08:03:48 CEST 1190 124 133 31 error /lib/systemd/systemd-timesyncd Wed 2021-05-19 08:03:48 CEST 1199 124 133 31 error /lib/systemd/systemd-timesyncd Wed 2021-05-19 08:03:48 CEST 1208 124 133 31 error /lib/systemd/systemd-timesyncd Wed 2021-05-19 08:03:48 CEST 1217 124 133 31 error /lib/systemd/systemd-timesyncd Wed 2021-05-19 17:44:30 CEST 1158 124 133 31 error /lib/systemd/systemd-timesyncd Wed 2021-05-19 17:44:30 CEST 1190 124 133 31 error /lib/systemd/systemd-timesyncd Wed 2021-05-19 17:44:30 CEST 1201 124 133 31 error /lib/systemd/systemd-timesyncd Wed 2021-05-19 17:44:30 CEST 1210 124 133 31 error /lib/systemd/systemd-timesyncd Wed 2021-05-19 17:44:30 CEST 1219 124 133 31 error /lib/systemd/systemd-timesyncd $ sudo coredumpctl gdb 1219 PID: 1219 (systemd-timesyn) UID: 124 (systemd-timesync) GID: 133 (systemd-timesync) Signal: 31 (SYS) Timestamp: Wed 2021-05-19 17:44:30 CEST (17min ago) Command Line: /lib/systemd/systemd-timesyncd Executable: /lib/systemd/systemd-timesyncd Control Group: /system.slice/systemd-timesyncd.service Unit: systemd-timesyncd.service Slice: system.slice Boot ID: bb2da3ff86ca4d0e8e4e5ab4e4a7433a Machine ID: ee39478c6fbf4a679a3f0795d320f25c Hostname: xxxxxxxx Storage: /var/lib/systemd/coredump/core.systemd-timesyn.124.bb2da3ff86ca4d0e8e4e5ab4e4a7433a.1219.1621439070000000000000.lz4 Message: Process 1219 (systemd-timesyn) of user 124 dumped core. Stack trace of thread 1219: #0 0x00000000f7f29e3b n/a (/lib/i386-linux-gnu/ld-2.31.so + 0x1be3b) #1 0x00000000f7f28855 n/a (/lib/i386-linux-gnu/ld-2.31.so + 0x1a855) #2 0x00000000f7f0ffc5 n/a (/lib/i386-linux-gnu/ld-2.31.so + 0x1fc5) #3 0x00000000f7f0f12b n/a (/lib/i386-linux-gnu/ld-2.31.so + 0x112b) GNU gdb (Ubuntu 9.2-0ubuntu1~20.04) 9.2 Copyright (C) 2020 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from /lib/systemd/systemd-timesyncd... (No debugging symbols found in /lib/systemd/systemd-timesyncd) [New LWP 1219] Core was generated by `/lib/systemd/systemd-timesyncd'. Program terminated with signal SIGSYS, Bad system call. #0 0xf7f29e3b in ?? () (gdb) bt #0 0xf7f29e3b in ?? () #1 0x56627a10 in ?? () Backtrace stopped: previous frame inner to this frame (corrupt stack?) (gdb)
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!
The problem did not occur in the past 2 weeks so that I can't provide additional info. I will do so when I encounter this situation again.
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!