RTX 2080 graphics card is not recognized as Optix compatible on Debian 10 I have the same issue as Timothy Tinsman on Debian 10 up to date: Blender 2.83 / 2.83.5 and 2.90 don't recognize my RTX 2080 graphics card as compatible with Optix.

CUDA, on the other hand, is functional.
The NVidia driver installed is the one offered by Debian in the non-free repository: 418.152.00 stable.
As suggested by Timothy Tinsman and in this post on blenderartists.org, I checked the packages libnvoptix1, libnvidia-rtcore and libnvidia-cbl. They're all installed.
Another leads?
Thanks!
I switched the NVidia drivers to 440.100 (from the backports repository) and Optix now seems to work.