Bug 333059

Summary:	Plasma Desktop crashes due to matrix widget being removed
Product:	[Unmaintained] plasma4	Reporter:	nuno_man
Component:	general	Assignee:	Plasma Bugs List <plasma-bugs>
Status:	RESOLVED DUPLICATE
Severity:	crash	CC:	cfeck
Priority:	NOR
Version:	unspecified
Target Milestone:	---
Platform:	Mint (Ubuntu based)
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	crash report #1 crash report #2

Description nuno_man 2014-04-04 00:29:24 UTC

The plasma widget matrix was inadvertadly placed too low on the screen so the mouse couldn't get to it to pull it above. I decided to use the "add widgets" and then "uninstall" option on this matrix plasmoid as a way of removing it. After that plasma desktop crashed and it crashes whenever the PC is turned on.
I'm guessing Plasma Desktop tries to run the matrix widget and, because it was uninstalled, it doesn't find it and crashes

Reproducible: Always

Steps to Reproduce:
1. turn on the PC
2. introduce the username and password
Actual Results:  
I get a message regarding the rash and I don't have any wallpaper nor panel: just a black screen with conky.

Expected Results:  
It should exhibit the wallpaper with the widgets (RSS feed, Weather), as well as the panel with all the usual icons such as lauch, time, notifications, ...

Comment 1 nuno_man 2014-04-04 00:33:40 UTC

I'm guessing it should be easy to fix. There must be a file with the names of the widgets that plasma desktop should run on startup. I think that deleting the "matrix" line probably fixes the problem. I don't know what is this plasma-desktop.ini file nor where it is saved.

Comment 2 Christoph Feck 2014-04-04 00:50:38 UTC

If the crash is reproducible, please add the backtrace. For more information, please see http://techbase.kde.org/Development/Tutorials/Debugging/How_to_create_useful_crash_reports

Comment 3 nuno_man 2014-04-04 12:12:25 UTC

Hello!
Problem solved. Actually I'm not sure if the matrix widget was the real problem.

I reinstalled this widget and typed on "plasma-desktop" the terminal .
It chrashed again.

I did some search and found that many have problems with google calendar so I tried many possible solutions with libgcal and none worked.
Finally I just lost my patience and opened the terminal and typed
sudo apt-get remove plasma-widget-googlecalendar

Problem solved. Plasma desktop behaves normally (without the google calendar widget).

Regarding the backtrace, I installed the packages that the bugreport app needed, I generated the .krash file but whenever I clicked on "send" it displayed an error message. Perhaps the bugreport has a bug itself!
Still, I have the files .krash.txt saved on the PC if you want them but I'm convinced that this was another google-calendar-widget issue instead of matrix-widget.

Thank you Christopher for your interest,
Kind regards,
Nuno

Comment 4 Christoph Feck 2014-04-04 18:16:48 UTC

Thanks for your update. If possible, please add the .krash.txt here, or simply paste it as a comment.

Comment 5 nuno_man 2014-04-05 02:50:13 UTC

Created attachment 85960 [details]
crash report #1

Ok, I hope it will be of use to make KDE even better!! :)

Comment 6 nuno_man 2014-04-05 02:51:27 UTC

Created attachment 85961 [details]
crash report #2

Comment 7 Christoph Feck 2014-04-05 06:24:42 UTC

Thanks, both traces indeed point to a problem with the gcal plasmoid.

*** This bug has been marked as a duplicate of bug 293719 ***