main.log shows some obsolete packages. I have no idea about first one. It should be safe to remove these old linux-image packages. Obsolete: hll2370dwpdrv:i386 linux-image-4.13.0-21-generic linux-image-extra-4.13.0-21-generic
apt.log shows Broken python-dev:amd64 Depends on python:amd64 Could you remove these development packages before upgrade? It should be safe. Still verify that necessary packages are not removed. sudo apt remove python-dev python2-dev Does it upgrade then? ** Changed in: ubuntu-release-upgrader (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1909882 Title: wanted to update ubuntu 18 to 20 every time is getting error To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1909882/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs