I found the answer. I checked "apt" history log in /var/log/apt and discovered that when I executed the "apt-get install ubuntu-desktop", the "ubuntu-desktop" package installed many cups packages (see below). These installations fixed whatever problems cups had previously. Wish someone could have just told me about this simple solution to fixing cups.
Start-Date: 2017-02-25 19:10:43 Commandline: apt-get install ubuntu-desktop Requested-By: sunbear (1000) Install: python3-pexpect:amd64 (4.0.1-1, automatic), hplip-data:amd64 (3.16.3+repack0-1, automatic), libqpdf17:amd64 (6.0.0-2, automatic), liblouisutdml-data:amd64 (2.5.0-3, automatic), printer-driver-splix:amd64 (2.0.0+svn315-4fakesync1, automatic), bluez-cups:amd64 (5.37-0ubuntu5, automatic), printer-driver-hpcups:amd64 (3.16.3+repack0-1, automatic), printer-driver-postscript-hp:amd64 (3.16.3+repack0-1, automatic), libsnmp-base:amd64 (5.7.3+dfsg-1ubuntu4, automatic), python3-reportlab-accel:amd64 (3.3.0-1, automatic), ubuntu-desktop:amd64 (1.361), printer-driver-pxljr:amd64 (1.4+repack0-4, automatic), cups-server-common:amd64 (2.1.3-4, automatic), ssl-cert:amd64 (1.0.37, automatic), python3-renderpm:amd64 (3.3.0-1, automatic), cups-filters:amd64 (1.8.3-2ubuntu3.1, automatic), libsnmp30:amd64 (5.7.3+dfsg-1ubuntu4, automatic), libcupsmime1:amd64 (2.1.3-4, automatic), hplip:amd64 (3.16.3+repack0-1, automatic), liblouisutdml6:amd64 (2.5.0-3, automatic), libhpmud0:amd64 (3.16.3+repack0- 1, automatic), printer-driver-gutenprint:amd64 (5.2.11-1, automatic), libfontembed1:amd64 (1.8.3-2ubuntu3.1, automatic), libgutenprint2:amd64 (5.2.11-1, automatic), liblouisutdml-bin:amd64 (2.5.0-3, automatic), libsane-hpaio:amd64 (3.16.3+repack0-1, automatic), qpdf:amd64 (6.0.0-2, automatic), cups-filters-core-drivers:amd64 (1.8.3-2ubuntu3.1, automatic), python3-ptyprocess:amd64 (0.5-1, automatic), cups-core-drivers:amd64 (2.1.3-4, automatic), cups-daemon:amd64 (2.1.3-4, automatic), python3-reportlab:amd64 (3.3.0-1, automatic), cups:amd64 (2.1.3-4, automatic), libcupscgi1:amd64 (2.1.3-4, automatic), cups-browsed:amd64 (1.8.3-2ubuntu3.1, automatic) Remove: foomatic-filters:amd64 (4.0.17-8) End-Date: 2017-02-25 19:11:16 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1661287 Title: Canon printer failed to connect with CUPS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1661287/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
