[drm:drm_wait_vblank [drm]] *ERROR* Unsupported type value 0xA, supported mask 0xB

[MisterFlicker]

Workaround for myself is diverting these log messages away from syslog:

1) Create a new rsyslog config file, e.g.-

sudo vi /etc/rsyslog.d/30-displaylink.conf

2) Add the following to the new configuration file:

# Divert noisy drm spam away from syslog
:msg,contains,"drm_wait_vblank" /var/log/displaylink.err

# Uncomment the following to stop logging anything that matches the last rule.
& stop

3) Restart rsyslog daemon;
sudo service rsyslog restart

The spam messages will now be diverted to the new log file '/var/log/displaylink.err'.

Have a nice DOS.