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O.S: Ubuntu 19.04 (disco)

Running sudo do-release-upgrade i got the following message:

Checking for a new Ubuntu release Your Ubuntu release is not supported anymore. For upgrade information, please visit: http://www.ubuntu.com/releaseendoflife

Please install all available updates for your release before upgrading.

Doing an apt upgrade i got this one:

The following packages have been kept back:
libsnmp30

That package couldn't be updated because it required libsensors5 but existing packages were using libsensors4. So i ran multiple commands from internet that manually installed libsensors5 and removed libsensors4.

Now i'm stuck on this error:

You might want to run 'apt --fix-broken install' to correct these. 
The following packages have unmet dependencies:  
libgl1-mesa-dri :
Depends: libsensors4 (>= 1:3.0.0) but it is not installable  
libsnmp30 : 
Depends: libsensors4 (>= 1:3.0.0) but it is not installable 
E: Unmet dependencies. 
Try 'apt --fix-broken install' with no packages (or specify a solution).

I've tried doing apt install libsensors4 but it doesn't let me as now i have v5.

How can i fix this mess so i can finally upgrade?

FrakyDale
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    You didnt say, but do you tried sudo apt --fix-broken install – B. du Garay Jun 22 '20 at 15:14
  • Yes, response is the same :( The following packages have unmet dependencies: libgl1-mesa-dri : Depends: libsensors4 (>= 1:3.0.0) but it is not installable libsnmp30 : Depends: libsensors4 (>= 1:3.0.0) but it is not installable E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages. E: Unable to correct dependencies – FrakyDale Jun 23 '20 at 06:12
  • Removing mesa drives won't break my laptop? that thread tells me to remove libgl1-mesa-dri & libsnmp30 – FrakyDale Jun 23 '20 at 13:40
  • I won't be playing with removing that package (even if it's already broken.. I think you can try to reinstall it, if it is in your repositories (apt search libgl1-mesa-dri)). This package isn't uptodate (since mine in 20.04 depends on libsensors5 > 1.3.5 ). – B. du Garay Jun 23 '20 at 13:44
  • Yes it is, but installing says: libgl1-mesa-dri is already the newest version :( – FrakyDale Jun 23 '20 at 13:46
  • you have to use the --reinstall flag just before the package name – B. du Garay Jun 23 '20 at 14:00
  • (you didnt add the results of apt install libsensors4 in your first post) – B. du Garay Jun 23 '20 at 14:01

1 Answers1

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I suggest you to try The Debian Way to upgrade your system. You have an issue because you are on disco (non-LTS) but disco is no more since eoan. And this is because disco is no more you can't install it with the apt/source.list .

I recommend you to make a backup if something goes wrong. Because you never know, when upgrading your system.

The Debian Way

In your case, you use neither of bionic or eoan, so you have to edit the commands that the a

sudo sed -i 's/disco/focal/g' /etc/apt/sources.list
sudo apt update && sudo apt -y dist-upgrade

When the Ubuntu upgrade does finish, reboot the system. When the system comes back up, you'll be running Ubuntu 20.04 LTS Focal Fossa!

sources : https://linuxconfig.org/how-to-upgrade-ubuntu-to-20-04-lts-focal-fossa#h4-how-to-upgrade-ubuntu-the-debian-way

Edit :

When I try some things on the internet, I do everything in the terminal because I add export PROMPT_COMMAND='history -a' in my $HOME/.bashrc file, and I make backup of every files I edit (cp file.cfg file.cfg.bk).

What does it do ? Every command I run in the terminal instantly happend in the $HOME/.bash_history file. Therefore, if I do something wrong, I can find my way back.

Ideally, you would make a write-up for that in a file.md, with URL, etc. First, because if you have to do it again. Second, because if something goes wrong. Third, because it might be helpful for someone, on day, right here in askubuntu.com ;-)

B. du Garay
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  • apt update explodes with that change: Ign:13 http://old-releases.ubuntu.com/ubuntu focal-security InRelease Err:14 http://old-releases.ubuntu.com/ubuntu focal Release 404 Not Found [IP: 91.189.88.153 80] Err:15 http://old-releases.ubuntu.com/ubuntu focal-updates Release 404 Not Found [IP: 91.189.88.153 80] Get:16 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages [12.5 kB] Err:17 http://old-releases.ubuntu.com/ubuntu focal-backports Release 404 Not Found , etc.. – FrakyDale Jun 23 '20 at 13:43
  • You can revert back anytime with sudo sed -i 's/focal/disco/g' /etc/apt/sources.list. I'm looking later for what's wrong. In the meantime, please report the previous return in your main post, clikcing on "Edit". Also, try to find the /etc/apt/source.list of the classic Ubuntu 20.04 version, backup yours and use them instead. – B. du Garay Jun 23 '20 at 13:46
  • Try sudo cp /etc/apt/sources.list /etc/apt/sources.list.bk1 && sudo curl https://termbin.com/vscr > /etc/apt/sources.list ; that's my sources.list file. Try it and try to sudo apt update (dont do anything else in case of errors). To reverse, simply do sudo mv /etc/apt/sources.list.bk1 /etc/apt/sources.list – B. du Garay Jun 23 '20 at 13:57
  • The Debian way is neither recommended nor a tested method to upgrade a Ubuntu release. Upgrading that way may cause many obsolete packages residing in the system. Also, since default Python version in Ubuntu varies from release to release, it may happen that you'll get completely broken python since if you observe closely, while upgrading using Ubuntu's upgrade tool, DPKG holds some packages to avoid dependency issues. Related: Is editing sources.list a good idea? – Kulfy Jun 24 '20 at 17:12