Seems to be the same bug as https://bugs.launchpad.net/ubuntu/+source
/light-locker-settings/+bug/1574544
This post report also a similar problem :
https://bugs.launchpad.net/ubuntu/+source/light-locker-
settings/+bug/1602338
I lately saw that the bug is already fixed so may be you can close
Under Lubuntu 16.04 I get exactly the same bug and I fixed it by changing the
line 219 of file
/usr/share/light-locker-settings/light-locker-settings/light-locker-settings.py
from
for pid in psutil.get_pid_list():
to:
for pid in psutil.pids():
This bug is due to a change in the module psutil
I get the same kind of error with the following message in the console:
Java 3D: implicit antialiasing enabled
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x7f103e9f8823, pid=22735, tid=139707759335168
#
# JRE version: OpenJDK Runtime
