This bug seems to be fixed in Xenial proposed package. My system reported about saned crashes (caused by assertion failure described in this bug) on every boot. Then I installed updated package and I do not observe any sane related crashes anymore.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1351286 Title: colord-sane assert failure: colord-sane: simple-watch.c:454: avahi_simple_poll_prepare: Assertion `s->state == STATE_INIT || s->state == STATE_DISPATCHED || s->state == STATE_FAILURE' failed. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sane-backends/+bug/1351286/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs