Hello. Thank you for hint, but it didn’t help.
So, I’ve installed nvidia-driver-450-server instead of 460/465, and it works fine.
I’ve found several similar topics, for example: [Regression in 460.27.04,460.32.03,460.39,...] Black screen: nvidia-modeset: ERROR: GPU:0: Failed to allocate display engine core DMA push buffer
Seems like something wrong with 460-series