It looks like the problem in my case has disappeared after replacing kernel version 2.6.32-23 by version 2.6.32-24. I am not absolutely sure, it could be a coincidence and it could also be caused by some other system modification or software upgrade - my usual procedure is to install updates immediately - but since that moment, I haven't experienced the problem any more. (I have made it a habit to execute runlevel and ps ax|grep cups after every boot.) If it is sort of race condition that is causing the problem, any change could slightly modify the timings and so make the problem disappear.
-- CUPS and other system services not starting at boot https://bugs.launchpad.net/bugs/554172 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs