Issue here is solved without changing driver.
On same driver ( 460.67) i can repro the issue if i launch the game with:
__NV_PRIME_RENDER_OFFLOAD=1 __GLX_VENDOR_LIBRARY_NAME=nvidia __VK_LAYER_NV_optimus=NVIDIA_only
However if i launch the game like this:
__NV_PRIME_RENDER_OFFLOAD=1 __VK_LAYER_NV_optimus=NVIDIA_only __GLX_VENDOR_LIBRARY_NAME=bla
I can’t repro the issue.
Issue seems to be rooted from __GLX_VENDOR_LIBRARY_NAME=nvidia
Proton 5.13-6 , Nvidia driver 460.67, Intel HD 630+GTX 1050 Optimus setup, on-demand mode