I used to be able to turn off the laptop screen by running xset dpms force off
. However now that I have upgrade to Ubuntu 17.10 this is the result:
X Error of failed request: BadMatch (invalid parameter attributes)
Major opcode of failed request: 147 (DPMS)
Minor opcode of failed request: 6 (DPMSForceLevel)
Serial number of failed request: 12
Current serial number in output stream: 14
xset
is for Xorg & not wayland. – guiverc Jan 28 '18 at 06:28