Same problem with Linux Mint 18.3
Installed Linux Mint with Noveau drivers (default). I got some problems and switched to nvidia proprietary drivers and then I cannot enter luks decryption at first attempt.
After rebooting I get text screen for password, which works well.
Driver version: 384
Same problem with Linux Mint 18.3
Installed Linux Mint with Noveau drivers (default). I got some problems and switched to nvidia proprietary drivers and then I cannot enter luks decryption at first attempt.
After rebooting I get text screen for password, which works well.
Driver version: 384