Thanks for this additional information and I'm sorry that you had to reformat. I close the bugreport because without the files we will not be able to diagnose what went wrong.
Thanks, Michael ** Changed in: update-manager (Ubuntu) Status: Incomplete => Invalid -- package update-manager 1:0.81.3 failed to install/upgrade: ErrorMessage: SystemError in cache.commit(): E:Sub-process /tmp/tmp4B5VU_/backports/usr/bin/dpkg returned an error code (1) https://bugs.launchpad.net/bugs/238193 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