[RESOLVED] Pre-Install Upgrade from 24.10 to 25.04 failing

[nilsA]

At startup I get a window:

"Upgrade available.
Ubuntu 25.04 is available"

And then a clickable: "Upgrade available."

When I click on it, I get a window saying:

"Upgrade failed with the following output:"

And then a blank space. No reason given.

I have tried updating and upgrading the PCs

Two from 24.10 and one from 24.04

What can I do now?

[TWPonKubuntu]

I confirm this problem... Any suggestion is appreciated. Yes, I could do a cold install, but I don't want to risk losing my current configuration files.

TWP

[jlittle]

In a konsole,

sudo do-release-upgrade

Even if it doesn't work, you've got a much better chance of finding out what went wrong.

[nilsA]

Thank you, John!

I have done the

sudo apt-get update
sudo apt-get upgrade
sudo do-release-upgrade

And get:

Please install all available updates for your release before upgrading

When I then do

sudo apt-get upgrade

I get

The following updates have been deferred due to phasing:
gzip
The following packages have been kept back:
libcanberra-pulse linux-generic linux-headers-generic linux-image-generic
0 upgraded, 0 newly installed, 0 to remove and 5 not upgraded
N: Some packages may have been kept back due to phasing

[jlittle]

The following updates have been deferred due to phasing:
gzip

If it is indeed the phasing that is stopping the release upgrade:

1. You can wait till you get the update. That should only be a few days. gzip is at 50% atm, meaning 50% of users have got the update.
2. If you install the phased package with sudo apt install gzip. This has the slight side effect of the package being manually installed; in the case of gzip that's not relevant, as every install should have it.

With linux-generic, linux-headers-generic, and linux-image-generic, I suspect a reboot might help.

[Snowhog]

One 'can' also, if they desire, turn off phased updates. I did, so I could get my 24.10 to upgrade to 25.04.

How do I turn off phased updates?

If you’re sure that you want to disable phased updates, reverting to the old behavior, you can change apt’s configuration by creating a file in /etc/apt/apt.conf.d called 99-Phased-Updates (if /etc/apt/apt.conf.d/99-Phased-Updates doesn’t already exist). In the file, simply add the following lines:

Update-Manager::Always-Include-Phased-Updates true;
APT::Get::Always-Include-Phased-Updates true;

[nilsA]

Thank you, bot! I went for the install routine, discovered that one more package was missing (libcanberra-pulse).

On one PC, I started the upgrade using:

sudo do-release-upgrade

On the other, I rebooted and waited for the message Version Upgrade Available. This went just fine, too.

The third has a startup message that I need to get written down in order to hear if it is something I should address.

[kubicle]

Thank you, John!
sudo apt-get update
sudo apt-get upgrade
sudo do-release-upgrade

"sudo apt-get upgrade" will only upgrade packages that can be upgraded without installing new packages or removing installed packages (due to dependencies)...that's why some of the upgrades (libcanberra-pulse linux-generic linux-headers-generic linux-image-generic) were kept back (the phasing has already been discussed).
You should use "sudo apt-get dist-upgrade" or "sudo apt full-upgrade" instead if you wish to upgrade everything.

The apt frontend command is newer than apt-get (and in most cases preferable), though you can also still use apt-get. But there are a few differences between the two:
apt-get upgrade = upgrade packages that can be upgraded without installing new packages or removing installed packages.
apt upgrade = upgrade packages that can be upgraded without removing installed packages.
apt-get dist-upgrade / apt full-upgrade = upgrade everything

[notabug]

libcanberra-pulse was holding my upgrade to 25.04. Your suggestion prompted me to do a manual install of that one package and I was then able to proceed with do-release-upgrade. Thank you jlittle.

[TWPonKubuntu]

I was able to do an install of the libcanberra-pulse and then full-upgrade. It took several hours but was successful.

Thanks for all the help.

PS: I am Not a 'bot'...

TWP