I’ve the same two errors on boot on my Pi 3B with 16.04.
I get
systemctl status britty.service
● britty.service
Loaded: not-found (Reason: No such file or directory)
Active: inactive (dead)
and
systemd-modules-load.service - Load Kernel Modules
Loaded: loaded (/lib/systemd/system/systemd-modules-load.service; static; vendor preset: enabled)
Active: failed (Result: exit-code) since Fri 2016-04-29 17:10:17 BST; 3min 32s ago
Docs: man:systemd-modules-load.service(8)
man:modules-load.d(5)
Process: 73 ExecStart=/lib/systemd/systemd-modules-load (code=exited, status=1/FAILURE)
Main PID: 73 (code=exited, status=1/FAILURE)
Apr 29 17:10:16 pibuntu systemd-modules-load[73]: Failed to find module ‘lp’
Apr 29 17:10:16 pibuntu systemd-modules-load[73]: Failed to find module ‘ppdev’
Apr 29 17:10:16 pibuntu systemd-modules-load[73]: Failed to find module ‘parport_pc’
Apr 29 17:10:16 pibuntu systemd-modules-load[73]: Inserted module ‘snd_bcm2835’
Apr 29 17:10:17 pibuntu systemd-modules-load[73]: Inserted module ‘bcm2708_rng’
Apr 29 17:10:17 pibuntu systemd[1]: systemd-modules-load.service: Main process exited, code=exited, status=1/FAILURE
Apr 29 17:10:17 pibuntu systemd[1]: Failed to start Load Kernel Modules.
Apr 29 17:10:17 pibuntu systemd[1]: systemd-modules-load.service: Unit entered failed state.
Apr 29 17:10:17 pibuntu systemd[1]: systemd-modules-load.service: Failed with result ‘exit-code’.
Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.
in Terminal.