[gentoo-user] NVidia-driver, RTX 2060 SUPER. Blender and NO Optix...

Hi,

I have discussed this on www.blenderartists.org and they asked
me to ask here to sort out, whether the problem is a Blender-thing,
a Linux-thing or a GENTOO-thing.

My setup is as follows:
NVidia RTX 2060 SUPER

NVidia-drivers:
[I] x11-drivers/nvidia-drivers
     Available versions:  (~)304.137-r1(0/304)^md[1] (~)340.107-r2(0/340)^md[1] 340.108(0/340)^mtd (~)375.82-r2(0/375)^md[1] (~)378.13-r5(0/378)^md[1] (~)381.22-r3(0/381)^md[1] (~)384.130-r1(0/384)^md[1] (~)387.34-r1(0/387)^md[1] (~)390.77-r1(0/390)^md[1] (~)390.87(0/390)^md[1] 390.132-r1(0/390)^mtd (~)390.132-r2(0/390)^mtd (~)396.24-r2(0/396)^md[1] (~)396.24.10-r1(0/396.24)^md[1] (~)396.45-r1(0/396)^md[1] (~)396.51-r1(0/396)^md[1] (~)396.51.02(0/396.51)^md[1] (~)396.54(0/396)^md[1] 430.64-r1(0/430)^mtd 435.21-r1(0/435)^mtd 440.64(0/440)^mtd {+X acpi compat +driver gtk3 +kms +libglvnd multilib pax_kernel static-libs +tools uvm wayland ABI_MIPS="n32 n64 o32" ABI_RISCV="lp64 lp64d" ABI_S390="32 64" ABI_X86="32 64 x32" KERNEL="FreeBSD linux"}
     Installed versions:  440.64(0/440)^mtd(03:03:25 AM 04/03/2020)(X driver kms libglvnd static-libs tools uvm -acpi -compat -gtk3 -multilib -wayland ABI_MIPS="-n32 -n64 -o32" ABI_RISCV="-lp64 -lp64d" ABI_S390="-32 -64" ABI_X86="64 -32 -x32" KERNEL="linux -FreeBSD")
     Homepage:            https://www.nvidia.com/
     Description:         NVIDIA Accelerated Graphics Driver

Blender 2.82a (stable) and
Blender 2.83  (deveoper build)

The NVidia RTX-cards offer a new feature called "Optix" which blender
can use to speed up rendering and denoising.

When Blender is started one choose "Optix" from the user
Preferences->System tab and then the Optix-enabled devices of the
system in question are shown.
There is a similiar tab, if you want to use CUDA instead.

The CUDA tab shows my graphics card and everything behaves as
exsoected. Choosing "Optix" instead says "No Optix enabled
device".

Which is not quite right, since the RTX-cards are Optix enabled.

In the thread on blenderartists there were two libs (?) mentioned (on
a Ubuntu system, where the Optix thingie works), which I cannot
find on my system:

    + libnividia-compute 
    + libnivia-gl 

. Does Gentoo installs a differently packaged nvidia-driver?
What is the source of those libraries?

If someone got Optix running with blender on a RTX-card under GENTOO
I woyld be very happy for any help! :)

Cheers and stay healthy!
Meino