[Bug 1771852] Re: In update-manager I see error "no internet connection", but it isn't true. And update of Ubuntu is no possible for me

[Pavol]

Jean, thank you very much for help!
Now I have successfully installed Ubuntu 18.04!
It is perfect release: light and very quick OS.

But I see other bugs:
- in login manager, when I choose other graphical interface / environment, after login into, I see empty screen only with background picture. Developer team of Ubuntu probably never tested Ubuntu 18.04 for switch on other graphical interfaces

- Ubuntu Software is no possible for use. It work on experimental Snap
packages. Installation of applications is no possible
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Title:
In update-manager I see error "no internet connection", but it isn't
true. And update of Ubuntu is no possible for me

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1771852/+subscriptions

[Jean-Baptiste Lallement]

Thanks for your report.

Disregard dino99 comment, it is incorrect and misleading.

One of the reason of the upgrade failure are invalid entries in
/etc/sources.list that point to a no longer available release:

deb http://archive.ubuntu.com/ubuntu zesty main universe restricted multiverse
deb-src http://archive.ubuntu.com/ubuntu zesty main universe restricted multiverse #Added by software-properties
deb http://security.ubuntu.com/ubuntu/ zesty-security main restricted multiverse universe
deb http://archive.ubuntu.com/ubuntu zesty-updates main restricted multiverse universe

Besides these duplicates the lines for artful and you can just remove
them then attempt the upgrade again. If it fails again then don't
hesitate to file another report.

** Changed in: ubuntu-release-upgrader (Ubuntu)
Status: Incomplete => Invalid
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1771852

Title:
In update-manager I see error "no internet connection", but it isn't
true. And update of Ubuntu is no possible for me

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1771852/+subscriptions

[Pavol]

Thank you very much for answer dino99.
I used gtkorphan.
But help me information only on this link
https://itsfoss.com/failed-to-download-repository-information-ubuntu-13-04/

Can you (=Ubuntu developers) repair in next update of Ubuntu all issues
with updates full resales and applications? It doesn't work correct and
the same issue has a lot of people.
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You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1771852

Title:
In update-manager I see error "no internet connection", but it isn't
true. And update of Ubuntu is no possible for me

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1771852/+subscriptions