Cannot upgrade to Ubuntu 20 due to broken packages

post by skeydan on Nov 13, 2020

Hi,

when trying to upgrade to Ubuntu 20 the process aborts because of broken packages.

Grepping for “broken” I see

 var/log/dist-upgrade/apt.log:Broken python-dev:amd64 Depends on python:amd64 < 2.7.15~rc1-1 @ii gR > (= 2.7.15~rc1-1)
/var/log/dist-upgrade/apt.log:Broken python2:amd64 Breaks on python:amd64 < 2.7.15~rc1-1 @ii gK Ib > (< 2.7.15-2)
/var/log/dist-upgrade/apt.log:Broken python-all-dev:amd64 Depends on libpython-all-dev:amd64 < 2.7.15~rc1-1 | 2.7.17-2ubuntu4 @ii umH > (= 2.7.17-2ubuntu4)
/var/log/dist-upgrade/apt.log:Broken python2-dev:amd64 Breaks on python-dev:amd64 < 2.7.15~rc1-1 @ii mK Ib > (< 2.7.15-2)
/var/log/dist-upgrade/apt.log:Broken libpython2-dev:amd64 Breaks on libpython-dev:amd64 < 2.7.15~rc1-1 @ii gK > (< 2.7.15-2)
/var/log/dist-upgrade/apt.log:Broken python-dev:amd64 Depends on python:amd64 < 2.7.15~rc1-1 @ii gR > (= 2.7.15~rc1-1)
/var/log/dist-upgrade/apt.log:Broken python2:amd64 Breaks on python:amd64 < 2.7.15~rc1-1 @ii gK Ib > (< 2.7.15-2)
/var/log/dist-upgrade/apt.log:Broken python-all-dev:amd64 Depends on python2-dev:amd64 < none | 2.7.17-2ubuntu4 @un uH > (= 2.7.17-2ubuntu4)
/var/log/dist-upgrade/apt.log:Broken libpython-all-dev:amd64 Depends on libpython2-dev:amd64 < none | 2.7.17-2ubuntu4 @un uH > (= 2.7.17-2ubuntu4)
/var/log/dist-upgrade/apt.log:Broken python-dev:amd64 Depends on python:amd64 < 2.7.15~rc1-1 @ii gR > (= 2.7.15~rc1-1)
/var/log/dist-upgrade/apt.log:Broken python2:amd64 Breaks on python:amd64 < 2.7.15~rc1-1 @ii gK Ib > (< 2.7.15-2)
/var/log/dist-upgrade/apt.log:Broken python-all:amd64 Depends on python2:amd64 < none | 2.7.17-2ubuntu4 @un umH > (= 2.7.17-2ubuntu4)
/var/log/dist-upgrade/apt.log:Broken python:amd64 PreDepends on python-minimal:amd64 < 2.7.15~rc1-1 @ii gR > (= 2.7.15~rc1-1)
/var/log/dist-upgrade/apt.log:Broken python:amd64 Depends on libpython-stdlib:amd64 < 2.7.15~rc1-1 @ii gR > (= 2.7.15~rc1-1)
/var/log/dist-upgrade/apt.log:Broken python-is-python2:amd64 Depends on python2:amd64 < none | 2.7.17-2ubuntu4 @un umH >
/var/log/dist-upgrade/apt.log:Broken python-is-python2:amd64 Breaks on python:amd64 < 2.7.15~rc1-1 @ii gK >
/var/log/dist-upgrade/apt.log:Broken python-dev:amd64 Depends on python:amd64 < 2.7.15~rc1-1 @ii gR > (= 2.7.15~rc1-1)
/var/log/dist-upgrade/apt.log:Broken python2-minimal:amd64 Breaks on python-minimal:amd64 < 2.7.15~rc1-1 @ii gK > (< 2.7.15-2)
/var/log/dist-upgrade/apt.log:Broken libpython2-stdlib:amd64 Breaks on libpython-stdlib:amd64 < 2.7.15~rc1-1 @ii gK > (< 2.7.15-2)
/var/log/dist-upgrade/apt.log:Broken python2:amd64 PreDepends on python2-minimal:amd64 < none | 2.7.17-2ubuntu4 @un umH > (= 2.7.17-2ubuntu4)
/var/log/dist-upgrade/apt.log:Broken python-all:amd64 Depends on python2:amd64 < none | 2.7.17-2ubuntu4 @un umH > (= 2.7.17-2ubuntu4)
/var/log/dist-upgrade/apt.log:Broken lambda-desktop:amd64 Depends on python-all:amd64 < 2.7.15~rc1-1 | 2.7.17-2ubuntu4 @ii umR >
/var/log/dist-upgrade/apt.log:Broken python-is-python2:amd64 Depends on python2:amd64 < none | 2.7.17-2ubuntu4 @un umH >

Would anyone have an idea what to do here? Many thanks!!

post by sabalaba on Nov 13, 2020

Try this:

sudo apt-get update --fix-missing
sudo apt-get install -f

Let me know if that works.

post by skeydan on Nov 13, 2020

Thanks for the quick answer! Unfortunately no, didn’t help …

I now tried something pretty drastic - uninstalled python2, as all of the things above involved python2 …

upgrade is running now

I’ll probably have to reinstall lambda stack … actually i hope it won’t reinstall python2, as i’d rather not have that on the system at all … (unless for possible internal use by linux or the distro) …

post by porthole on Apr 15, 2021

Thank you! I was in the same boat, trying to upgrade my workstation to Ubuntu 20.04. Received:

This was likely caused by: Unofficial software packages not provided by Ubuntu. Please use the tool ‘ppa-purge’ from the ppa-purge package to remove software from a Launchpad PPA and try the upgrade again.

Removing python2 allowed the update scripts to work:

sudo apt purge python2.7-minimal

post by ronneely on Jun 26, 2023

Does this help: How do I upgrade Ubuntu and Lambda Stack? | Lambda Docs ?