Hi!
I am running Kubuntu 13.04 with KDE 4.10.2 and I have the problem that kio_thumbnail is running with 100% Processor-speed even though

• no Dolphin-Window is open that could generate thumbnails
• Thumbnails are disabled in Dolphin.
• I even disabled Nepomuk indexing, just to be sure.

The only active program is Handbrake, besides that my Desktop is completely empty, I have no folder-Plasmoid pointing at the directory Handbrake encodes to.
This is how top looks like at the moment:

Code: Select all

top - 14:54:25 up 1 day, 22:13,  4 users,  load average: 7,69, 8,05, 7,87
Aufgaben: 264 total,   3 running, 261 sleeping,   0 stopped,   0 zombie
%Cpu(s): 33,3 us,  0,6 sy, 65,2 ni,  1,0 id,  0,0 wa,  0,0 hi,  0,0 si,  0,0 st
KiB Mem:   8176812 total,  8032072 used,   144740 free,    80404 buffers
KiB Swap:        0 total,        0 used,        0 free,  3960948 cached

 PID USER      PR  NI  VIRT  RES  SHR S  %CPU %MEM    TIME+  COMMAND     

7255 hauke     20   0 4076m 1,2g  22m S 297,5 15,7   3880:19 ghb
6017 hauke     20   0  883m  44m  11m R  95,4  0,6 266:47.50 kio_thumbnail
1493 root      20   0  363m 192m  61m S   1,3  2,4 155:17.39 Xorg
2588 hauke     39  19 1005m 489m 4232 R   1,3  6,1  29:38.87 virtuoso-t
3454 hauke     20   0  508m  32m  18m S   1,0  0,4   8:18.01 konsole
2456 hauke     20   0 2279m 261m  53m S   0,7  3,3  36:27.05 plasma-desktop
2584 hauke     20   0 2856m 220m  20m S   0,7  2,8  60:42.36 clementine
8518 hauke     20   0  985m 119m  38m S   0,3  1,5   1:48.63 chrome
8619 hauke     20   0  939m  55m  17m S   0,3  0,7   0:30.73 chrome
18014 root      20   0     0    0    0 S   0,3  0,0   0:02.61 kworker/2:1

Is there any way i can stop kio_thumbnail from taking recources without actually doing anything useful?

Best regards and thanks in advance!
Hauke

This is probably a hung process from previous use of the system - such as with Dolphin, Gwenview, etc.
To fix this, simply kill the kio_thumbnail process in question.

Hi!
Thanks for the answer. I tried killing (both with general killall kio_thumbnail and killing the specific process) it but it re-appeared. After a while though (maybe 1-2 hours) it disappeared by itself though. So problem solved

Okay. If it reappears in the future, it might be helpful to run "lsof" against the process in question to find out which file it is processing as further improvements may be needed on the thumbnailing process for that type of file.

I still have this problem quite often on 4.13.3. This is on kubuntu 14.04.
I saw a similar topic at arch: https://bbs.archlinux.org/viewtopic.php?id=146607. There, it was suggested that this is linked to "preview" being activated. So I turned off the preview function, and the CPU load immediately went down to normal levels.
(For the sake of completeness, I should probably mention that I am seeing this on konqueror and not on dolphin (which I almost never use).