Why doesn't torch see сuda?

i have problem with torch and cuda.

torch.version.__version__ gives "1.5.1+cu101"

torch.version.cuda gives "10.1"

torch.backends.cudnn.version() gives "7603"

But torch.cuda.is_avaliable() gives False. What can be wrong?

Parameters of my system:

Linux-x86_64 (Ubuntu 20.04)

GeForce GTX 1050

NVIDIA Driver Version: 460.67