Today, I got the option to upgrade to the new 20.04 version. The installer got to 99% and it said there was some error (it didn't say what) and that it would roll back the upgrade. Instead, the installer just froze and nothing happened.

My KDE version is still 5.19.4 but it pretends there are no updates to be found:

I ran

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sudo dpkg-reconfigure -a

which only configured phpmyadmin.

sudo do-release-upgrade says:

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Checking for a new Ubuntu release
No new release found.

sudo pkcon update && sudo pkcon refresh: No packages require updating to newer versions.
sudo apt update && sudo apt dist-upgrade: also nothing

Also, my sound no longer works (there is only Dummy output).

Is there any way to retry the upgrade?

First try

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sudo apt install -f

Then, it should be

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sudo dpkg --configure -a

(a space and two dashes after 'dpkg', and 'configure' instead of 'reconfigure')

Plasma is 5.19.4 no matter if you are on the 18.04 base or the 20.04.
I will guess you were upgraded to 20.04

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lsb_release -a

will show the info.


A common cause for broken sound on *buntu 20.04 upgrades is caused by Timidity, if that is installed. Remove it if you have it. Else use standard Ubuntu troubleshooting techniques if running the apt and dpkg commands do not remedy things.

Thanks. apt install -f and dpkg don't do anything, so it looks like all updates are ready.

Maybe I am just confused, because lsb_release does show 20.04 even though the About shows 5.19.4.

I somehow got the sound to work again, but I am not sure yet whether this is a temporary fix or not

Is there any way to find out what went wrong in the installation? Do I need to fix anything?

kyrawertho wrote:Thanks. apt install -f and dpkg don't do anything, so it looks like all updates are ready.

Maybe I am just confused, because lsb_release does show 20.04 even though the About shows 5.19.4.

I somehow got the sound to work again, but I am not sure yet whether this is a temporary fix or not

Is there any way to find out what went wrong in the installation? Do I need to fix anything?

5.19.4 is the current Plasma version
20.04 is the Ubuntu version being used as the base.
The two numbers are not related, and both are correct.

Losing sound seems to be a somewhat common issue with recent Ubuntu upgrades, there seems to be no single solution, and may not be related to the upgrade issue you had.

There will be logs of the upgrade, which are found in /var/log/dist-upgrade/ maybe there are clues in there, perhaps?

All right, problem solved - I was just looking at the wrong version number and the upgrade was done completely.

The logs show this:

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2020-08-11 12:35:43,389 ERROR got an error from dpkg for pkg: 'phpmyadmin': 'subproces van pakket phpmyadmin werd script post-installation geïnstalleerd gaf de foutwaarde 1 terug'
2020-08-11 12:35:43,396 ERROR got an error from dpkg for pkg: 'phpmyadmin': 'subproces van pakket phpmyadmin werd script post-installation geïnstalleerd gaf de foutwaarde 1 terug'
2020-08-11 12:37:39,069 ERROR Exception during pm.DoInstall()
Traceback (most recent call last):
  File "/tmp/ubuntu-release-upgrader-wptt442j/DistUpgrade/DistUpgradeView.py", line 220, in run
    res = pm.do_install(self.writefd)
apt_pkg.Error: E:Sub-process /usr/bin/dpkg returned an error code (1)
2020-08-11 12:37:39,082 ERROR SystemError from cache.commit(): installArchives() failed
2020-08-11 12:37:39,082 ERROR found exception: 'E:Sub-process /usr/bin/dpkg returned an error code (1)'


So I suppose only phpmyadmin had issues, which was fixed already. I also had to uninstall mysql.

Sound seems to work by adding "options snd-hda-intel dmic_detect=0" to /etc/modprobe.d/alsa-base.conf and "pulseaudio -k && sudo alsa force-reload".

Thanks