update-rc.d tdm-trinity disable doesn't work on raspbian jessie

Hi there. I've got some raspberry pi's running raspbian-jessie with trinity installed. They're intended to be run headless, with trinity available as needed. I'd like the option to start the desktop manually, not automatically. I tried # update-rc.d tdm-trinity disable and got insserv: warning: current start runlevel(s) (empty) of script `tdm-trinity' overrides LSB defaults (2 3 4 5). insserv: warning: current stop runlevel(s) (0 1 2 3 4 5 6) of script `tdm-trinity' overrides LSB defaults (0 1 6). insserv: warning: current start runlevel(s) (empty) of script `tdm-trinity' overrides LSB defaults (2 3 4 5). insserv: warning: current stop runlevel(s) (0 1 2 3 4 5 6) of script `tdm-trinity' overrides LSB defaults (0 1 6). After a reboot I'm still seeing /var/run/tdm.pid and I can stop the desktop/greeter? with # /etc/init.d/tdm-trinity stop I ran raspi-config and set the option to boot into command line without login/desktop but that doesn't seem to have any effect. Any pointers? Regards, Philip Ashmore