This is the OS:
- Kubuntu 16.04 (fresh install but with the home folder from my old 14.04 installation)
- KDE Plasma vesion: 5.5
- OS Type: 64 bit
- Kernel: 4.4.0-51
After restart I try to remove file from the desktop. The delete process takes about 2 to 3 minutes (takes about 14% CPU of my i7). This is for all kinds of files. I delete the file just with right click and 'Move to trash' option. After the first delete the other deletes are OK and happen immediately. I tried to remove my .kde folder , so that is recreated from the OS. This did not work as well. I cannot create new user because I have many configurations for this user. I don't know if this is the right place for such question because this is bug and not question to learn from.
Probably this guy have the same problem , but he didn't wait enough to see if the file is deleted or not: https://www.youtube.com/watch?v=xnVWmAFPOeA