In Feisty (CUPS 1.2.7) the 100% CPU problem disappears, probably due to the following fix:
http://www.cups.org/str.php?L1994 The problem of cups-polld running as root and therefore not taken down when cupsys is stopped still persists. I recommend to expand the cupsys run-as-user patch to also let the sub-daemons (cups-polld and cups-lpd) drop their privileges as soon as possible. This way CUPS can kill these daemons and as a side effect the security of these daemons is improved. ** Changed in: cupsys (Ubuntu) Status: Unconfirmed => Confirmed ** Summary changed: - cupsd pushes the pedal to 99% when restarting + cupsd takes 99% CPU when BrowsePoll is used, cups-polld not taken down when CUPS is stopped -- cupsd takes 99% CPU when BrowsePoll is used, cups-polld not taken down when CUPS is stopped https://launchpad.net/bugs/30965 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs