I've followed your guide and it didn't work

[G-Pereira]

OS: Arch Linux
I think this output can be helpful:

ls ~/.local/share/mime/application 
sla.xml

What information can I provide to further investigate the error?
I already rebooted my pc.
PS: sudo update-mime it does not wotk on my computer, the command isn't found

[kaklik]

Hello,

I can confirm this behavior on Ubuntu 18.04.1. It seems to be corrupted by some changes in OS. I am unable to solve this issue, although it seems to be similar to the following reports:
NixOS/nixpkgs#50494
https://unix.stackexchange.com/questions/410395/custom-thumbnail-generation-fails

[hcremer]

Having the same problem on Ubuntu 16.04.5 is there any workarauound to get this going?

[kaklik]

I do not know, what is the difference. But here #6
seem to be proof that at least some machines the same version still works.
Isolating the trouble will be a great improvement of this thumbnailer.

[pczekalski]

Same problem with Ubuntu 20.04. No thumbnails at all. Any hints on how to troubleshoot it?

[OZ1SEJ]

Same problem with Ubuntu 22.04.

[artichoked1]

Hi, I'm also having this problem with Ubuntu 22.04 .

[hcremer]

Try https://github.com/unlimitedbacon/stl-thumb that should work.

[artichoked1]

Try https://github.com/unlimitedbacon/stl-thumb that should work.

I tried this one too and it didn't work. Just installed the deb file with GDebi and rebooted but the STL files just show blank document icons like before.

[hcremer]

Is OpenGL installed?

[artichoked1]

Isn't openGL support built into the GPU?

[hcremer]

Sorry, I meant OpenSCAD

[artichoked1]

Yes, it is installed.

[yebo29]

I'm able to run the python script on its own and get a good result. However, I too can't get any thumbnails to show up after following the guide, including logging out and back in. What I did see in the logs is:
openscad[506240]: segfault at a8 ip 0000560bea2b42e4 sp 00007ffc6e774698 error 4 in openscad[560bea02d000+51a000]
Whenever it tries to generate a thumbnail. I don't know enough about how nautilus/ubuntu calls the script to troubleshoot further.

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=22.04
DISTRIB_CODENAME=jammy
DISTRIB_DESCRIPTION="Ubuntu 22.04.1 LTS"