Comment 20 for bug 1597415

Confirming the same issue on Ubuntu Server 18.04 LTS:

Error calling EVIOCSKEYCODE on device node '/dev/input/event2' (scan code 0x9004c, key code 162): Invalid argument
CODE_FILE ../src/udev/udev-builtin-keyboard.c
CODE_FUNC map_keycode
CODE_LINE 103
ERRNO 22
PRIORITY 3
SYSLOG_FACILITY 3
SYSLOG_IDENTIFIER systemd-udevd
_BOOT_ID 8561955e61444adea66c6983c7972f60
_CAP_EFFECTIVE 3fffffffff
_CMDLINE /lib/systemd/systemd-udevd
_COMM systemd-udevd
_EXE /lib/systemd/systemd-udevd
_GID 0
_HOSTNAME blueeyebrows
_MACHINE_ID 3c83a050931347c59c2d930c491afdc7
_PID 340
_SELINUX_CONTEXT unconfined
_SOURCE_REALTIME_TIMESTAMP 1530104311822252
_SYSTEMD_CGROUP /system.slice/systemd-udevd.service
_SYSTEMD_INVOCATION_ID da5926014fa944509d5e10a8d9a6adf2
_SYSTEMD_SLICE system.slice
_SYSTEMD_UNIT systemd-udevd.service
_TRANSPORT journal
_UID 0
__CURSOR s=b7551ec2b2f942ae94a42e8501582e71;i=1784;b=8561955e61444adea66c6983c7972f60;m=868e2f;t=56f9f2bf9bcec;x=626cfce2d4ede039
__MONOTONIC_TIMESTAMP 8818223
__REALTIME_TIMESTAMP 1530104311823596

Kernel: 4.15.0-23-generic #25-Ubuntu SMP Wed May 23 18:02:16 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux