FWIW. I experience the same state of affairs on Ubuntu 17.10
Jan 9 00:07:13 planb colord[999]: failed to get session [pid 10836]: No data available
> ps ax | grep 10836 10836 ? Ss 0:00 /usr/sbin/cupsd -l
FWIW. I experience the same state of affairs on Ubuntu 17.10
Jan 9 00:07:13 planb colord[999]: failed to get session [pid 10836]: No data available
> ps ax | grep 10836
10836 ? Ss 0:00 /usr/sbin/cupsd -l