The Kde Task bar froze really often when I run KDE under a realtime kernel. Everything in the taskbar is frozen (the clock, the menu, all the icons of the launched application). But I am still able to use application (I switch between applications using alt+tab). I recover the task bar if I disconnect / reconnect from my session. I use Fedora 27 + last KDE version. Kernel RT is 4.18.12-rt8.
Is the desktop froze? Does it react to right click? Please get a backtrace of the frozen process.
I've got no reaction to a right click on the task bar. But I don't remember if I was able to get a reaction to a right click on the desktop. I think the answer is no because I tried to start konsole to see what's happening. And I must have done a right click on the desktop. But I will check. How do I get a backtrace of the frozen process ? How do I identify the frozen process ?
From a terminal when frozen Sudo gdb --pid `pidof plasmashell` Then type "bt" to get a trace
I met the freeze again. In fact, this was not a freeze. I looked at the plasmasheel processes: $ ps -elf | grep plasma 0 Z collette 1776 1 2 80 0 - 0 task_d 18:11 ? 00:01:18 [plasmashell] <defunct> 0 S collette 21709 12626 0 80 0 - 29882 - 19:01 pts/2 00:00:00 grep --color=auto plasma So, plasmashell was dead. I killed it via a kill -15 and then restarted manually plasmashell ...
So are you saying it's a crash?
More a crash than a freeze. I thought it was a freeze because the taskbar was still there.
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!
It's still not working ! I am waiting on advices on how to get useful informations to track down this bug ...
Reopening
Nevermind, please provide a backtrace.
And how do I get this backtrace ?
> From a terminal when frozen > sudo gdb --pid `pidof plasmashell` > Then type "bt" to get a trace Or just start plasmashell with gdb, run gdb plasmashell and then type r for "run" and then when it freezes type "bt"
Thanks, I will try this ASAP.
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!