This happens to me too. The printer reports on the display a low toner warning right after switch on and after every finished print job.
My printer: Samsung C1860FW This is also reported on https://bugs.debian.org/cgi- bin/bugreport.cgi?bug=961345. ** Bug watch added: Debian Bug tracker #961345 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=961345 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1846334 Title: cupsd assert failure: free(): invalid pointer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1846334/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
