Well I have no clue which version you're actually using so 10.0 or master & I have no clue where is stated that Nvidia isn't supported. Both LibreELEC branches, so 10.0 & master, SHOULD have working Nvidia configurations. So post details & logfiles. If your system reboots try to prevent this by running:
touch /storage/.config/safemode.disable
In a ssh terminal.
Apologies I should have given you more information.
I read that Nvidia cards were not supported in LibreElec and then when my card wasn't recognised I made the assum- ption...and we know where that gets you - has gotten me in fact.
I was using the x86-64-ve (SSE4) LibreELEC-Generic.x86_64-10.0-RR-20211104-75af1a0.img.
Should I have used the master version then? My CPU supports SSE4 hence me using that version. I haven't got any log files yet but will do in the next day or two.
Thanks for all your hard work with LibreElec RR too.