[Bug 1874121] [NEW] I've tried to upgrade Ubuntu 16.04 to 18.04 from terminal but I couldn't do it. I have no problems with ppa, that doesn't apply in this case.

Public bug reported: I have no any ppa installed, then I don't what is the issue. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: ubuntu-release-upgrader-core 1:16.04.29 ProcVersionSignature: Ubuntu 4.15.0-96.97~16.04.1-generic 4.15.18 Uname: Linux 4.15.0-96-generic x86_64 ApportVersion: 2

[Bug 1790031] [NEW] pkgProblemResolver::Resolve generated breaks, this may be caused by held packsges.

Public bug reported: Don't upgrade the OS. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: ubuntu-release-upgrader-core 1:16.04.25 ProcVersionSignature: Ubuntu 4.15.0-33.36~16.04.1-generic 4.15.18 Uname: Linux 4.15.0-33-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.18 Architecture: amd64 Cr

[Bug 1072024] Re: I can't 'dist-upgrade' from 12.04 to 12.10 Ubuntu (64bits)

** Changed in: ubuntu-release-upgrader (Ubuntu) Status: Invalid => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1072024 Title: I can't 'dist-upgrade' from 12.04 to 12.10 Ubuntu (64bits)

[Bug 1085663] Re: An unresolvable problem occurred while calculating the upgrade: E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.

** Changed in: ubuntu-release-upgrader (Ubuntu) Status: Invalid => New ** Changed in: ubuntu-release-upgrader (Ubuntu) Assignee: (unassigned) => Iván David Castañeda Balaguera (ivadavcasbal) -- You received this bug notification because you are a member of Ubuntu Bugs, wh