Hello,
I have a problem.
I use Devuan excalibur on a Thinkpad P53 with a Thunderbolt 3 docking station.

There are 2 graphics cards:
01:00.0 VGA compatible controller: NVIDIA Corporation TU106GLM [Quadro RTX 3000 Mobile / Max-Q] (rev a1)
00:02.0 VGA compatible controller: Intel Corporation CoffeeLake-H GT2 [UHD Graphics 630] (rev 02)

Perhaps the incorrect video driver?
Unfortunately, the two external monitors connected to the Thunderbolt are not working.
They are visible in the control panel, but there is no image. The Thunderbolt is activated, and the keyboard, mouse, and network are working.

Can you help me solve this?
Thank you.

rrbs