It looks like Nvidia might be dropping support for some older cards. I had a problem this morning where LightDM would fail to start on my server. After fighting with it for a while I found the Nvidia Driver (396.24) wasn’t running. Checking Nvidia’s website the last driver for my card (Tesla C2075) is the 390.46. I have attempted to install the 390 drivers with pacman -S nvidia-390xx but I am getting a lot of “file exists in file system” errors.