Bug 281331

Summary: Installation of applets written in python lead to problems with devicenotifier
Product: [Unmaintained] plasma4 Reporter: Mirek Mieszczak <mieszcz>
Component: widget-devicenotifierAssignee: Plasma Bugs List <plasma-bugs>
Status: RESOLVED UPSTREAM    
Severity: normal CC: wilderkde
Priority: NOR    
Version: unspecified   
Target Milestone: ---   
Platform: Gentoo Packages   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Mirek Mieszczak 2011-09-04 17:55:22 UTC 
Version:           unspecified (using KDE 4.6.5) 
OS:                Linux

Installation of any applet that is written in python lead to silent crash (or program end) of kdeinit4 plasma-desktop.

This lead to the state, that after insering of usb keys, or harddisks mounting of these devices is impossible.

Reproducible: Always

Steps to Reproduce:
Install python applet on desktop/panel like:
veromix: http://kde-apps.org/content/show.php/Veromix+-+volume+control+%2B+soundmenu?content=116676
tail: http://kde-apps.org/content/show.php/tail?content=118067
After that, try to mount inserted usb stick

Actual Results:  
The usb key will no be mounted, and on log there will appear following message:
console-kit-daemon[2097]: WARNING: Couldn't read /proc/2766/environ: Failed to open file '/proc/2766/environ': No such file or directory 

where mentioned proc (in that case 2766) is:
kdeinit4 plasma-desktop, which silently disappeared at the moment of starting of the python applet. 

Expected Results:  
Normal mount of usb stick.

It happen frequently, that if there are active python applets, the login procedure to kde is taking very long time, and plasma-desktop is taking 100% of cpu usage. killing of plasma-desktop, and restarting it after few minutes helps in most cases.
Comment 1 Mirek Mieszczak 2011-11-14 09:15:14 UTC 
I just checked on kde-4.7.3
The problems still persists.
As I can see, in the process list, the process kdeinit4: plasma-desktop is restarted after activation of the python-plasmoid.

In the following process list there are two snapshots, first one before loading of python plasmoid, and second one after loading of the python plasmoid.







1 S mirek    21805     1  0  80   0 - 77576 poll_s 09:37 ?        00:00:00 kdeinit4: kdeinit4 Running...     
1 S mirek    21812 21805  0  80   0 - 78820 poll_s 09:37 ?        00:00:00 kdeinit4: klauncher [kdeinit] --fd=8
1 S mirek    21821     1  1  80   0 - 171439 poll_s 09:37 ?       00:00:01 kdeinit4: kded4 [kdeinit]         
1 S mirek    21844     1  0  80   0 - 96779 poll_s 09:37 ?        00:00:00 kdeinit4: kglobalaccel [kdeinit]  
1 S mirek    21862     1  0  80   0 - 97394 poll_s 09:37 ?        00:00:00 kdeinit4: kwalletd [kdeinit]      
1 S mirek    21896 21805  0  80   0 - 117233 poll_s 09:37 ?       00:00:00 kdeinit4: ksmserver [kdeinit]     
1 S mirek    22022     1 16  80   0 - 250569 poll_s 09:37 ?       00:00:11 kdeinit4: plasma-desktop [kdeinit]
1 S mirek    22097 21805  0  80   0 - 79694 poll_s 09:37 ?        00:00:00 kdeinit4: kio_file [kdeinit] file local:/tmp/ksocket-mirek/klauncherT21812.slave-socket local:/tmp/ksocket-mirek/lancelotG22049.slave-socket
1 S mirek    22099 21805  0  80   0 - 79694 poll_s 09:37 ?        00:00:00 kdeinit4: kio_file [kdeinit] file local:/tmp/ksocket-mirek/klauncherT21812.slave-socket local:/tmp/ksocket-mirek/lancelotD22049.slave-socket
1 S mirek    22103 21805  0  80   0 - 79694 poll_s 09:37 ?        00:00:00 kdeinit4: kio_file [kdeinit] file local:/tmp/ksocket-mirek/klauncherT21812.slave-socket local:/tmp/ksocket-mirek/lancelotA22049.slave-socket
1 S mirek    22188 21805  0  80   0 - 81695 poll_s 09:37 ?        00:00:00 kdeinit4: kio_trash [kdeinit] trash local:/tmp/ksocket-mirek/klauncherT21812.slave-socket local:/tmp/ksocket-mirek/plasma-desktops22022.slave-socket
1 S mirek    22191 21805  0  80   0 - 79694 poll_s 09:37 ?        00:00:00 kdeinit4: kio_file [kdeinit] file local:/tmp/ksocket-mirek/klauncherT21812.slave-socket local:/tmp/ksocket-mirek/plasma-desktopr22022.slave-socket
1 S mirek    22210     1  0  80   0 - 97071 poll_s 09:37 ?        00:00:00 kdeinit4: kaccess [kdeinit]       
1 S mirek    22218     1  2  80   0 - 169514 poll_s 09:37 ?       00:00:01 kdeinit4: krunner [kdeinit]       
1 S mirek    22270 21805  0  80   0 - 81695 poll_s 09:37 ?        00:00:00 kdeinit4: kio_trash [kdeinit] trash local:/tmp/ksocket-mirek/klauncherT21812.slave-socket local:/tmp/ksocket-mirek/krunnerX22218.slave-socket
1 S mirek    22472     1  0  80   0 - 139910 poll_s 09:37 ?       00:00:00 kdeinit4: kmix [kdeinit] -session 10144143108142000132121202800000166360011_1321212751_83906
1 S mirek    22506     1  0  80   0 - 97810 poll_s 09:37 ?        00:00:00 kdeinit4: klipper [kdeinit]       
1 R mirek    22676     1  1  80   0 - 120477 -     09:37 ?        00:00:00 kdeinit4: konsole [kdeinit] --profile Shell
0 S mirek    25001 22689  0  80   0 -  1746 pipe_w 09:38 pts/4    00:00:00 grep --colour=auto kdeinit
mirek@laptop-mirka ~ $ ps -afel|grep kdeinit
0 S mirek      931 22689  0  80   0 -  1745 pipe_w 09:39 pts/4    00:00:00 grep --colour=auto kdeinit
1 S mirek    21805     1  0  80   0 - 77576 poll_s 09:37 ?        00:00:00 kdeinit4: kdeinit4 Running...     
1 S mirek    21812 21805  0  80   0 - 78266 poll_s 09:37 ?        00:00:00 kdeinit4: klauncher [kdeinit] --fd=8
1 S mirek    21821     1  1  80   0 - 171439 poll_s 09:37 ?       00:00:01 kdeinit4: kded4 [kdeinit]         
1 S mirek    21844     1  0  80   0 - 96779 poll_s 09:37 ?        00:00:00 kdeinit4: kglobalaccel [kdeinit]  
1 S mirek    21862     1  0  80   0 - 97394 poll_s 09:37 ?        00:00:00 kdeinit4: kwalletd [kdeinit]      
1 S mirek    21896 21805  0  80   0 - 117233 poll_s 09:37 ?       00:00:00 kdeinit4: ksmserver [kdeinit]     
1 S mirek    22097 21805  0  80   0 - 79694 poll_s 09:37 ?        00:00:00 kdeinit4: kio_file [kdeinit] file local:/tmp/ksocket-mirek/klauncherT21812.slave-socket local:/tmp/ksocket-mirek/lancelotG22049.slave-socket
1 S mirek    22099 21805  0  80   0 - 79694 poll_s 09:37 ?        00:00:00 kdeinit4: kio_file [kdeinit] file local:/tmp/ksocket-mirek/klauncherT21812.slave-socket local:/tmp/ksocket-mirek/lancelotD22049.slave-socket
1 S mirek    22103 21805  0  80   0 - 79694 poll_s 09:37 ?        00:00:00 kdeinit4: kio_file [kdeinit] file local:/tmp/ksocket-mirek/klauncherT21812.slave-socket local:/tmp/ksocket-mirek/lancelotA22049.slave-socket
1 S mirek    22188 21805  0  80   0 - 81695 poll_s 09:37 ?        00:00:00 kdeinit4: kio_trash [kdeinit] trash local:/tmp/ksocket-mirek/klauncherT21812.slave-socket local:/tmp/ksocket-mirek/plasma-desktops22022.slave-socket
1 S mirek    22191 21805  0  80   0 - 79694 poll_s 09:37 ?        00:00:00 kdeinit4: kio_file [kdeinit] file local:/tmp/ksocket-mirek/klauncherT21812.slave-socket local:/tmp/ksocket-mirek/plasma-desktopr22022.slave-socket
1 S mirek    22210     1  0  80   0 - 97071 poll_s 09:37 ?        00:00:00 kdeinit4: kaccess [kdeinit]       
1 S mirek    22218     1  1  80   0 - 168960 poll_s 09:37 ?       00:00:01 kdeinit4: krunner [kdeinit]       
1 S mirek    22270 21805  0  80   0 - 81695 poll_s 09:37 ?        00:00:00 kdeinit4: kio_trash [kdeinit] trash local:/tmp/ksocket-mirek/klauncherT21812.slave-socket local:/tmp/ksocket-mirek/krunnerX22218.slave-socket
1 S mirek    22472     1  0  80   0 - 139910 poll_s 09:37 ?       00:00:00 kdeinit4: kmix [kdeinit] -session 10144143108142000132121202800000166360011_1321212751_83906
1 S mirek    22506     1  0  80   0 - 97810 poll_s 09:37 ?        00:00:00 kdeinit4: klipper [kdeinit]       
1 S mirek    22676     1  1  80   0 - 120477 poll_s 09:37 ?       00:00:01 kdeinit4: konsole [kdeinit] --profile Shell
1 S mirek    32424     1 15  80   0 - 278189 poll_s 09:38 ?       00:00:01 kdeinit4: plasma-desktop [kdeinit]
                                                                                                                                 


What is changed? the process number of kdeinit4: plasma-desktop [kdeinit].

Now if I try to mount usb stick using device manager I get following error in system log:

Nov 14 09:39:53 laptop-mirka console-kit-daemon[2989]: WARNING: Couldn't read /proc/22022/environ: Failed to open file '/proc/22022/environ': No such file or directory
Comment 2 Aaron J. Seigo 2011-12-04 10:04:31 UTC 
problem in python bindings and in consolekit, neither of which we can do much about from plasma's code.