SUMMARY When I open a folder in dolphin with a thumbnail view enabled that contains this pdf [1], a "gs" process runs that fully consumes on of the cpu cores. It runs for a while (seconds), and sometimes it seems that when it stops a new one is started again, so this goes on for a while. When I encountered this for the first time, I didn't have this folder open at all, and I had three of them running in parallel, heating up my cpu enough for me to notice this issue. I don't know if I had previously opened the folder since the last reboot though (I often go days, sometimes weeks without reboot). So maybe this can even happen during background-preparation of thumbnails or something? The pdf itself opens without problems in Okular and mupdf. [1] https://www.weishaupt.de/uploads/tx_weishaupt_documents/documents/83247601_10_16.pdf STEPS TO REPRODUCE 1. download pdf: https://www.weishaupt.de/uploads/tx_weishaupt_documents/documents/83247601_10_16.pdf 2. open folder containing the pdf with dolphin with thumbnails enabled OBSERVED RESULT gs process with high cpu load spawned/possibly respawned full command according to "ps aux", edited for privacy: gs -sDEVICE=png16m -sOutputFile=- -dSAFER -dPARANOIDSAFER -dNOPAUSE -dFirstPage=1 -dLastPage=1 -q - /home/me/path/83247601_10_16.pdf -c showpage -c quit EXPECTED RESULT no high cpu usage or only for a short time SOFTWARE/OS VERSIONS Kernel Version: 6.4.11-arch2-1 (64-bit) KDE Plasma Version: 5.27.7 KDE Frameworks Version: 5.109.0 Qt Version: 5.15.10 ADDITIONAL INFORMATION
I am experiencing the same problem. Both /usr/lib/kf6/kioworker and gs take up a lot of CPU. I am downloading a lot of PDF files, and the output directory is opened in Dolphin. Once I close the output directory, the problem disappears. It takes 2-5 minutes to download a single PDF, but they are large in size, ranging between 60M and 350M. So I suspect that this issue may be related to large PDFs?