Public bug reported: While trying to do a do-release-update today on Ubuntu 16.04 I hit an unusual snag ("No new releases found") which turned out to be caused by out of date proxy settings in Synaptic -- an apt package management GUI that was last relevant approximately 10 years ago in Ubuntu 9.04 .
Test case: 1. Have invalid proxy settings from 10 years ago in "/root/.synaptic/synaptic.conf" 2. Run release update either through GUI or using "do-release-upgrade" in bash 3. Receive error "No new releases found" I have confirmed that once I deleted "/root/.synaptic/synaptic.conf", the distribution update shows up correctly. I understand the consideration of this file was added to the release- updater code trying to resolve a bug, but it is really unreasonable to expect someone to be able to figure out this is to blame for a rejected distribution update in 2020. At the very least include some debugging information. ** Affects: update-manager (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1877759 Title: update-manager takes proxy settings from unreasonable places To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1877759/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs