I am not sure if without proprietary firmware and drivers you can use the
OpenGL.
> When I used the right Alt key with any combination, my computer
> shutdown. I thought this might be an issue with my dwm configuration
> but I was not able to find the issue. Then I thought about testing in
> Mate and I was so surprised to find out sometimes right Alt + any
> other key would
> I have no idea how to reinstall the "plymouth-theme-trisquel-logo"
> package. Could you please give me some hints, where to find it,
> installation steps ...
If you're comfortable using a terminal, you can (re)install any package
with "sudo apt install [name of package]", so in this case
$
It's an alt-right conspiracy.
I tried right Alt + a-z and 0-9, but never triggered shutdown. (deblobbed
Debian sid with vanilla MATE)