Ubuntu
plasma-workspace package

Kubuntu 15.04 (Vivid Vervet) plasmashell crashes with segmentation fault

Bug #1449726 reported by bhaskar
52
This bug affects 11 people
Affects Status Importance Assigned to Milestone
kde-workspace
New
Undecided
Unassigned
plasma-workspace (Ubuntu)
Confirmed
Undecided
Unassigned

Bug Description

At random times - every few minutes, the taskbar disappears and I get a pop up window that has two tabs, a General tab and a Developer information tab. The General tab says:

---------------------------------------------------------------------------------------------------
We are sorry, Plasma closed unexpectedly.

You can help us improve KDE Software by reporting this error.
Learn more about bug reporting.

Note: It is safe to close this dialog if you do not want to report this bug.

Executable: plasmashell PID: <pid> Signal: Segmentation fault (11) Time: <date and time>

[Report Bug] [Debug] [Restart Application] [Close]
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The task bar restarts automatically. The Developer Information tab says:

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Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f0d7fa7b7c0 (LWP 31041))]

<…snip because launchpad won't let me attach the entire contents…>

#45 0x000000000042fd9b in main (argc=4, argv=<optimized out>) at ../../shell/main.cpp:158
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If I click on Report Bug, it takes me to the Crash Reporting Assistant. I click on No, I do not remember what I was doing. It tries to generate a bug report and then says "This report does not contain enough information for the developers …". I will see whether I can attach the contents of the report generated by the assistant to this report.

In case it helps, I have multiple desktop packages (ubuntu-desktop, xubuntu-desktop, etc.) installed on my laptop, but only started up KDE after boot.

Revision history for this message
bhaskar (bhaskar) wrote :
Revision history for this message
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in plasma-workspace (Ubuntu):
status: New → Confirmed
Revision history for this message
Lluis Turró (lluis-turro) wrote :

I had the same problem at random time. Adding a new widget and scrolling over caused de error every time after few seconds.

Playing around activities, I tried adding a new empty one. No changes. Then I deleted this new one and the "Search & Launch", which was no functional anyway.

The error has disappeared.

Revision history for this message
Majlando (milankocvara) wrote :

I have the same problem with plasma segfault. Window is shown everytime when are checked updates of Kubuntu until I do upgrade...

Revision history for this message
Majlando (milankocvara) wrote :

* when are checked updates and if any update is find... When I do upgrade then, window does not shown to next update with changes

Revision history for this message
Carlos (1-contacto-carlosgonzalez) wrote :

Same problem here, specially when I switch the wifi connection.

Revision history for this message
John (jh-wilson) wrote :

Same here, but only on a machine with Nvidia graphics using the Nouveau driver. Another machine with Intel graphics is not affected.
One thing I have noticed is that icons set to Shown on the system tray (usually Networks) often vanish shortly before the message and then reappear afterwards.

Revision history for this message
John (jh-wilson) wrote :

I spoke too soon - it's happening on the Intel machine too.

Revision history for this message
Graham (gt-8) wrote :

I get a Plasma shell crash at varying times - usually once a day or so. Something that seems to trigger it fairly predictably is switching desktops while certain activities are busy doing network stuff.

I'm a web developer and I have Kate sessions with several dozen files open, such as all the PHP from a WordPress site. I have Dolphin on one desktop and Kate on another. If I open a new batch of remote files from Dolphin, the system (Kubuntu 15.10) switches desktops and opens the new files, but if I don't wait for this to finish and go back to Dolphin (or elsewhere) Plasma tends to crash, usually not offering to restart (but perhaps that message window is on a now-inaccessible desktop?).

The window on the current desktop is still active, but with no system tray I can't move from it. Once I close it I get a black screen and the only way the system will then respond is Ctrl-Alt-Del or Alt-F-something to start a new login shell. I'm not sufficiently experienced to know how to restart Plasma, or even if it's possible.

I have no great interest in operating systems; I just use them. I pick the one that lets me do my work cleanly, and until Plasma 5 KDE/Kubuntu was streets ahead of anything else. If there were something on Windows to match Dolphin/Kate for seamless local and remote file management I'd go there. It's a shame that Plasma 5 is a several-steps downgrade in reliability terms.

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