Fix thunar doesn't show image/video thumbnails in xubuntu 18.04

Question

No matter what I do the result is there no image/video thumbnails

$ thunar --version
Thunar 1.6.15 (Xfce 4.12)

$ sudo apt install tumbler tumbler-plugins-extra ffmpegthumbnailer 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
ffmpegthumbnailer is already the newest version (2.1.1-0.1build1).
tumbler is already the newest version (0.2.1-0ubuntu1).
tumbler-plugins-extra is already the newest version (0.2.1-0ubuntu1).
0 upgraded, 0 newly installed, 0 to remove and 2 not upgraded.

$ mv ~/.config/Thunar ~/.config/Thunar.bak

also enabled thumbnails in thunar:

Solution

Every post out there that tries to fix the problem of thumbnails they do the following or something similar

$ killall thunar
$ sudo apt install tumbler tumbler-plugins-extra ffmpegthumbnailer 
$ thunar -q

and that's it, they open thunar, and thumbnails magically appear, but You need to restart your machine.

Comments

[let champagne open]

Does ~/.cache/thumbnails/ exist?

[Xayden Rosario]

Ye, but it has nothing

[Alex Ozer]

You can restart tumblerd instead of restarting your computer also.

[jcubic]

@AlexOzer how to restart tumblerd?

[Admin]

@jcubic I just did ps aux | grep tumblerd and then killed the associated process and can indeed confirm that that solves the problem