https://bugs.kde.org/show_bug.cgi?id=406810

jacob.bec...@uni-konstanz.de changed:

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--- Comment #27 from jacob.bec...@uni-konstanz.de ---
I contacted Henning an during a testing session we discovered that the issue
still kan be triggered wit an new Kubuntu 20.04.1 live-Session, if you have an
older CPU in your system.

No special requirement and 100% reproducible on my lenovo x230 thinkpad wit
Intel Core i7 3XXX CPU.

a) Start live-Session of Kubuntu
b) create a encfs (all the tools are already installed - no network connection
neccessary)  
encfs /path/to/encrypted_folder /path/to/unecrypted_folder
(you can choose the paranoia settings) and set a password 

c) Open the unecrypted folder in dolphin an create a libre-office file.
d) leave the dolphin folder-view open an type some garbage in the file - the
contend doesn't matter
e) Save the file in libre office
f) Dolphin now uses 100% CPU of a core

In Kubuntu 20.04.1 you can press F5 or change the folder in dolphin to another
one to get thing back to normal.
I'm currently testing some VM environments with cpu-flags if i can recreate the
same behavior on more modern CPUs.

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