Upgrade to Ubuntu 20.04 fails due to non-existing PPA server

Not a problem of the launchpad services, but an Ubuntu problem. Relocating the question accordingly.

For diagnostic purposes please provide the output that you receive for the commands

uname -a
lsb_release -crid
grep hanipouspilot /etc/apt/sources.list /etc/apt/sources.list .d/*.list
grep ubuntu-toolchain-r /etc/apt/sources.list /etc/apt/sources.list .d/*.list
apt-cache policy mutter gsettings-desktop-schemas gnome-settings-daemon-common

Thanks Manfred for helping out!

Here's the output:
root@ubuntu:~# uname -a
Linux ubuntu 4.15.0-118-generic #119-Ubuntu SMP Tue Sep 8 12:30:01 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

root@ubuntu:~# lsb_release -crid
Distributor ID: Ubuntu
Description: Ubuntu 18.04.5 LTS
Release: 18.04
Codename: bionic

root@ubuntu:~# grep hanipouspilot /etc/apt/sources.list /etc/apt/sources.list .d/*.list
grep: .d/*.list: No such file or directory

root@ubuntu:~# grep hanipouspilot /etc/apt/sources.list /etc/apt/sources.list

root@ubuntu:~# grep ubuntu-toolchain-r /etc/apt/sources.list /etc/apt/sources.list .d/*.list
grep: .d/*.list: No such file or directory

root@ubuntu:~# grep ubuntu-toolchain-r /etc/apt/sources.list /etc/apt/sources.list

root@ubuntu:~# apt-cache policy mutter gsettings-desktop-schemas gnome-settings-daemon-common
mutter:
  Installed: 3.28.4-0ubuntu18.04.2
  Candidate: 3.28.4-0ubuntu18.04.2
  Version table:
 *** 3.28.4-0ubuntu18.04.2 500
        500 http://il.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     3.28.1-1ubuntu1 500
        500 http://il.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
gsettings-desktop-schemas:
  Installed: 3.28.0-1ubuntu1
  Candidate: 3.28.0-1ubuntu1
  Version table:
 *** 3.28.0-1ubuntu1 500
        500 http://il.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
        500 http://il.archive.ubuntu.com/ubuntu bionic/main i386 Packages
        100 /var/lib/dpkg/status
N: Unable to locate package gnome-settings-daemon-common

Sorry, there was a typo error in my commands, please try again with

grep hanipouspilot /etc/apt/sources.list /etc/apt/sources.list.d/*.list
grep ubuntu-toolchain-r /etc/apt/sources.list /etc/apt/sources.list.d/*.list

Sure!

root@ubuntu:~# grep hanipouspilot /etc/apt/sources.list /etc/apt/sources.list.d/*.list
root@ubuntu:~#

root@ubuntu:~# grep ubuntu-toolchain-r /etc/apt/sources.list /etc/apt/sources.list.d/*.list
/etc/apt/sources.list.d/ubuntu-toolchain-r-ubuntu-test-bionic.list:deb http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu bionic main
/etc/apt/sources.list.d/ubuntu-toolchain-r-ubuntu-test-bionic.list:deb-src http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu bionic main

This is unexpected, no output that shows hanipouspilot

please provide the output that you receive for

grep -i rtlwifi /etc/apt/sources.list /etc/apt/sources.list.d/*.list
sudo apt update

And another command whose output will be needed for the next steps:

apt-cache policy $(dpkg --get-selections | grep -v deinstall$ | awk '{ print $1 }') | perl -e '@a = <>; $a=join("", @a); $a =~ s/\n(\S)/\n\n$1/g; @packages = split("\n\n", $a); foreach $p (@packages) {print "$1: $2\n" if $p =~ /^(.*?):.*?500 http:\/\/ppa\.launchpad\.net\/(.*?)\s/s}'

No problem:

root@ubuntu:~# grep -i rtlwifi /etc/apt/sources.list /etc/apt/sources.list.d/*.list

root@ubuntu:~# sudo apt update
Hit:1 http://linux.teamviewer.com/deb stable InRelease
Hit:2 http://il.archive.ubuntu.com/ubuntu bionic InRelease
Get:3 http://il.archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]
Hit:4 https://repo.skype.com/deb stable InRelease
Get:5 https://download.docker.com/linux/ubuntu bionic InRelease [64.4 kB]
Get:6 http://il.archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]
Hit:7 http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu bionic InRelease
Hit:8 http://repo.mysql.com/apt/ubuntu bionic InRelease
Get:9 http://packages.microsoft.com/repos/vscode stable InRelease [3,959 B]
Hit:10 http://dl.google.com/linux/chrome/deb stable InRelease
Get:11 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]
Hit:12 https://dl.winehq.org/wine-builds/ubuntu cosmic InRelease
Get:13 http://il.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages [1,089 kB]
Get:14 http://il.archive.ubuntu.com/ubuntu bionic-updates/main i386 Packages [748 kB]
Hit:15 https://packages.microsoft.com/ubuntu/19.10/prod eoan InRelease
Get:16 http://il.archive.ubuntu.com/ubuntu bionic-updates/main amd64 DEP-11 Metadata [295 kB]
Get:17 http://il.archive.ubuntu.com/ubuntu bionic-updates/universe i386 Packages [1,034 kB]
Get:18 http://il.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 Packages [1,113 kB]
Get:19 http://il.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 DEP-11 Metadata [285 kB]
Get:20 http://il.archive.ubuntu.com/ubuntu bionic-updates/multiverse amd64 DEP-11 Metadata [2,468 B]
Ign:21 http://dl.google.com/linux/earth/deb stable InRelease
Hit:22 https://packages.microsoft.com/repos/ms-teams stable InRelease
Get:23 http://il.archive.ubuntu.com/ubuntu bionic-backports/universe amd64 DEP-11 Metadata [9,288 B]
Hit:24 https://download.sublimetext.com apt/stable/ InRelease
Get:25 http://packages.microsoft.com/repos/vscode stable/main amd64 Packages [201 kB]
Hit:26 http://dl.google.com/linux/earth/deb stable Release
Get:27 http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages [868 kB]
Get:29 http://security.ubuntu.com/ubuntu bionic-security/main i386 Packages [545 kB]
Get:30 http://security.ubuntu.com/ubuntu bionic-security/main amd64 DEP-11 Metadata [49.0 kB]
Get:31 http://security.ubuntu.com/ubuntu bionic-security/universe amd64 Packages [709 kB]
Get:32 http://security.ubuntu.com/ubuntu bionic-security/universe i386 Packages [643 kB]
Get:33 http://security.ubuntu.com/ubuntu bionic-security/universe Translation-en [236 kB]
Get:34 http://security.ubuntu.com/ubuntu bionic-security/universe amd64 DEP-11 Metadata [56.0 kB]
Get:35 http://security.ubuntu.com/ubuntu bionic-security/multiverse amd64 DEP-11 Metadata [2,464 B]
Fetched 8,206 kB in 3s (3,098 kB/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
2 packages can be upgraded. Run 'apt list --upgradable' to see them.

root@ubuntu:~# apt list --upgradable
Listing... Done
firefox/bionic-updates,bionic-security 81.0+build2-0ubuntu0.18.04.1 amd64 [upgradable from: 80.0.1+build1-0ubuntu0.18.04.1]
firefox-locale-en/bionic-updates,bionic-security 81.0+build2-0ubuntu0.18.04.1 amd64 [upgradable from: 80.0.1+build1-0ubuntu0.18.04.1]

root@ubuntu:~# apt-cache policy $(dpkg --get-selections | grep -v deinstall$ | awk '{ print $1 }') | perl -e '@a = <>; $a=join("", @a); $a =~ s/\n(\S)/\n\n$1/g; @packages = split("\n\n", $a); foreach $p (@packages) {print "$1: $2\n" if $p =~ /^(.*?):.*?500 http:\/\/ppa\.launchpad\.net\/(.*?)\s/s}'
gcc-10-base: ubuntu-toolchain-r/test/ubuntu
gcc-10-base: ubuntu-toolchain-r/test/ubuntu
gcc-9-base: ubuntu-toolchain-r/test/ubuntu
gcc-9-base: ubuntu-toolchain-r/test/ubuntu
gdb: ubuntu-toolchain-r/test/ubuntu
gdbserver: ubuntu-toolchain-r/test/ubuntu
lib32atomic1: ubuntu-toolchain-r/test/ubuntu
lib32gcc-s1: ubuntu-toolchain-r/test/ubuntu
lib32gcc1: ubuntu-toolchain-r/test/ubuntu
lib32gomp1: ubuntu-toolchain-r/test/ubuntu
lib32itm1: ubuntu-toolchain-r/test/ubuntu
lib32quadmath0: ubuntu-toolchain-r/test/ubuntu
lib32stdc++6: ubuntu-toolchain-r/test/ubuntu
libatomic1: ubuntu-toolchain-r/test/ubuntu
libcc1-0: ubuntu-toolchain-r/test/ubuntu
libgcc-s1: ubuntu-toolchain-r/test/ubuntu
libgcc-s1: ubuntu-toolchain-r/test/ubuntu
libgcc1: ubuntu-toolchain-r/test/ubuntu
libgomp1: ubuntu-toolchain-r/test/ubuntu
libitm1: ubuntu-toolchain-r/test/ubuntu
liblsan0: ubuntu-toolchain-r/test/ubuntu
libobjc4: ubuntu-toolchain-r/test/ubuntu
libquadmath0: ubuntu-toolchain-r/test/ubuntu
libstdc++6: ubuntu-toolchain-r/test/ubuntu
libtsan0: ubuntu-toolchain-r/test/ubuntu
libx32atomic1: ubuntu-toolchain-r/test/ubuntu
libx32gcc-s1: ubuntu-toolchain-r/test/ubuntu
libx32gcc1: ubuntu-toolchain-r/test/ubuntu
libx32gomp1: ubuntu-toolchain-r/test/ubuntu
libx32itm1: ubuntu-toolchain-r/test/ubuntu
libx32quadmath0: ubuntu-toolchain-r/test/ubuntu
libx32stdc++6: ubuntu-toolchain-r/test/ubuntu

Ok, a bit strange, but let's try to go forward.

1. There seems not to be any package from ppa:hanipouspilot/rtlwifi on your system any more, and also the PPA is already disabled (no error on apt update).

2. There are some packages from ppa:ubuntu-toolchain-r/test but they should (at least in my opinion) not block the release upgrade.

I suggest hat you try the release upgrade again.
If it fails the same way, then you should remove ppa:ubuntu-toolchain-r/test with the ppa-purge tool. In my opinion ppa-purge should now work.

OK, this was scary :)

The upgrade failed again, so I did ppa-purge ppa:ubuntu-toolchain-r/test, which succeeded.
However, this broke apt, after this operation apt refused to do anything, failed with the following error message:
error while loading shared library libgcc_s.so.1: cannot open shared object file: No such file or directory
Unwisely rebooted the machine, and Ubuntu got stuck in a boot loop!
From recovery console I copied the file back from a different machine.
Ubuntu now boots, everything back to normal, however I still cannot upgrade :)

#do-release-upgrade
Checking for a new Ubuntu release
Get:1 Upgrade tool signature [1,554 B]
Get:2 Upgrade tool [1,342 kB]
Fetched 1,344 kB in 0s (0 B/s)
authenticate 'focal.tar.gz' against 'focal.tar.gz.gpg'
extracting 'focal.tar.gz'

Reading cache

Checking package manager
Reading package lists... Done
Building dependency tree
Reading state information... Done
Hit http://il.archive.ubuntu.com/ubuntu bionic InRelease
Hit http://il.archive.ubuntu.com/ubuntu bionic-updates InRelease
Hit http://il.archive.ubuntu.com/ubuntu bionic-backports InRelease
Hit http://linux.teamviewer.com/deb stable InRelease
Get:1 https://download.docker.com/linux/ubuntu bionic InRelease [64.4 kB]
Hit https://repo.skype.com/deb stable InRelease
Hit http://repo.mysql.com/apt/ubuntu bionic InRelease
Hit http://dl.google.com/linux/chrome/deb stable InRelease
Ign http://dl.google.com/linux/earth/deb stable InRelease
Hit http://packages.microsoft.com/repos/vscode stable InRelease
Hit http://dl.google.com/linux/earth/deb stable Release
Get:2 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]
Hit https://dl.winehq.org/wine-builds/ubuntu cosmic InRelease
Hit https://packages.microsoft.com/ubuntu/19.10/prod eoan InRelease
Hit https://packages.microsoft.com/repos/ms-teams stable InRelease
Hit https://download.sublimetext.com apt/stable/ InRelease
Fetched 153 kB in 0s (0 B/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done

Checking for installed snaps

Calculating snap size requirements

Updating repository information

Third party sources disabled

Some third party entries in your sources.list were disabled. You can
re-enable them after the upgrade with the 'software-properties' tool
or your package manager.

To continue please press [ENTER]

Hit http://il.archive.ubuntu.com/ubuntu focal InRelease
Hit http://il.archive.ubuntu.com/ubuntu focal-updates InRelease
Hit http://il.archive.ubuntu.com/ubuntu focal-backports InRelease
Hit http://security.ubuntu.com/ubuntu focal-security InRelease
Fetched 0 B in 0s (0 B/s)

Checking package manager
Reading package lists... Done
Building dependency tree
Reading state information... Done

Calculating the changes

Calculating the changes

Could not calculate the upgrade

An unresolvable problem occurred while calculating the upgrade.

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.

If none of this applies, then please report this bug using the
command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. If
you want to investigate this yourself the log files in
'/var/log/dist-upgrade' will contain details about the upgrade.
Specifically, look at 'main.log' and 'apt.log'.

Restoring original system state

Aborting
Reading package lists... Done
Building dependency tree
Reading state information... Done

Thanks for all your help & dedication Manfred, I hope we will be able to fix it soon.
Vitaliy

What's now the last lines of apt.log? Still complaining about mutter, gsettings-desktop-schemas and gnome-settings-daemon-common?

This seems to be a frequent problem nowadays, see https://launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bugs?orderby=-id&start=0

Several bug reports with similar log files.

I have no idea about the root cause and how to correct it. HI hope that the developers will pick that up soon.

The current log is:
MarkDelete ubuntu-desktop:amd64 < 1.417.5 | 1.450.2 @ii umH Ib > FU=0
Investigating (5) gsettings-desktop-schemas:amd64 < 3.28.0-1ubuntu1 -> 3.36.0-1ubuntu1 @ii umU Ib >
Broken gsettings-desktop-schemas:amd64 Breaks on mutter:amd64 < 3.28.4-0ubuntu18.04.2 | 3.36.4-0ubuntu0.20.04.2 @ii umH > (< 3.31.4)
  Considering mutter:amd64 2 as a solution to gsettings-desktop-schemas:amd64 79
  Upgrading mutter:amd64 due to Breaks field in gsettings-desktop-schemas:amd64
Investigating (5) printer-driver-postscript-hp:amd64 < 3.17.10+repack0-5 | 3.20.3+dfsg0-2 @ii umH Ib >
Broken printer-driver-postscript-hp:amd64 Depends on hplip:amd64 < 3.17.10+repack0-5 | 3.20.3+dfsg0-2 @ii umR > (>= 3.17.10+repack0-5)
  Considering hplip:amd64 4 as a solution to printer-driver-postscript-hp:amd64 2
  Re-Instated printer-driver-postscript-hp:amd64
Investigating (5) mutter:amd64 < 3.28.4-0ubuntu18.04.2 -> 3.36.4-0ubuntu0.20.04.2 @ii umU Ib >
Broken mutter:amd64 Depends on gnome-settings-daemon-common:amd64 < none | 3.36.1-0ubuntu1 @un uH >
  Considering gnome-settings-daemon-common:amd64 0 as a solution to mutter:amd64 2
  MarkKeep mutter:amd64 < 3.28.4-0ubuntu18.04.2 -> 3.36.4-0ubuntu0.20.04.2 @ii umU Ib > FU=0
  Holding Back mutter:amd64 rather than change gnome-settings-daemon-common:amd64
Investigating (5) gir1.2-mutter-6:amd64 < none -> 3.36.4-0ubuntu0.20.04.2 @un uN Ib >
Broken gir1.2-mutter-6:amd64 Depends on libmutter-6-0:amd64 < none | 3.36.4-0ubuntu0.20.04.2 @un uH > (= 3.36.4-0ubuntu0.20.04.2)
  Considering libmutter-6-0:amd64 0 as a solution to gir1.2-mutter-6:amd64 0
  MarkKeep gir1.2-mutter-6:amd64 < none -> 3.36.4-0ubuntu0.20.04.2 @un uN Ib > FU=0
  Holding Back gir1.2-mutter-6:amd64 rather than change libmutter-6-0:amd64
Investigating (6) gsettings-desktop-schemas:amd64 < 3.28.0-1ubuntu1 -> 3.36.0-1ubuntu1 @ii umU Ib >
Broken gsettings-desktop-schemas:amd64 Breaks on mutter:amd64 < 3.28.4-0ubuntu18.04.2 | 3.36.4-0ubuntu0.20.04.2 @ii umH > (< 3.31.4)
  Considering mutter:amd64 2 as a solution to gsettings-desktop-schemas:amd64 79
  Upgrading mutter:amd64 due to Breaks field in gsettings-desktop-schemas:amd64
Investigating (6) mutter:amd64 < 3.28.4-0ubuntu18.04.2 -> 3.36.4-0ubuntu0.20.04.2 @ii umU Ib >
Broken mutter:amd64 Depends on gnome-settings-daemon-common:amd64 < none | 3.36.1-0ubuntu1 @un uH >
  Considering gnome-settings-daemon-common:amd64 0 as a solution to mutter:amd64 2
  MarkKeep mutter:amd64 < 3.28.4-0ubuntu18.04.2 -> 3.36.4-0ubuntu0.20.04.2 @ii umU Ib > FU=0
  Holding Back mutter:amd64 rather than change gnome-settings-daemon-common:amd64
Investigating (7) gsettings-desktop-schemas:amd64 < 3.28.0-1ubuntu1 -> 3.36.0-1ubuntu1 @ii umU Ib >
Broken gsettings-desktop-schemas:amd64 Breaks on mutter:amd64 < 3.28.4-0ubuntu18.04.2 | 3.36.4-0ubuntu0.20.04.2 @ii umH > (< 3.31.4)
  Considering mutter:amd64 2 as a solution to gsettings-desktop-schemas:amd64 79
  Upgrading mutter:amd64 due to Breaks field in gsettings-desktop-schemas:amd64
Investigating (7) mutter:amd64 < 3.28.4-0ubuntu18.04.2 -> 3.36.4-0ubuntu0.20.04.2 @ii umU Ib >
Broken mutter:amd64 Depends on gnome-settings-daemon-common:amd64 < none | 3.36.1-0ubuntu1 @un uH >
  Considering gnome-settings-daemon-common:amd64 0 as a solution to mutter:amd64 2
  MarkKeep mutter:amd64 < 3.28.4-0ubuntu18.04.2 -> 3.36.4-0ubuntu0.20.04.2 @ii umU Ib > FU=0
  Holding Back mutter:amd64 rather than change gnome-settings-daemon-common:amd64
Investigating (8) gsettings-desktop-schemas:amd64 < 3.28.0-1ubuntu1 -> 3.36.0-1ubuntu1 @ii umU Ib >
Broken gsettings-desktop-schemas:amd64 Breaks on mutter:amd64 < 3.28.4-0ubuntu18.04.2 | 3.36.4-0ubuntu0.20.04.2 @ii umH > (< 3.31.4)
  Considering mutter:amd64 2 as a solution to gsettings-desktop-schemas:amd64 79
  Upgrading mutter:amd64 due to Breaks field in gsettings-desktop-schemas:amd64
Investigating (8) mutter:amd64 < 3.28.4-0ubuntu18.04.2 -> 3.36.4-0ubuntu0.20.04.2 @ii umU Ib >
Broken mutter:amd64 Depends on gnome-settings-daemon-common:amd64 < none | 3.36.1-0ubuntu1 @un uH >
  Considering gnome-settings-daemon-common:amd64 0 as a solution to mutter:amd64 2
  MarkKeep mutter:amd64 < 3.28.4-0ubuntu18.04.2 -> 3.36.4-0ubuntu0.20.04.2 @ii umU Ib > FU=0
  Holding Back mutter:amd64 rather than change gnome-settings-daemon-common:amd64
Investigating (9) gsettings-desktop-schemas:amd64 < 3.28.0-1ubuntu1 -> 3.36.0-1ubuntu1 @ii umU Ib >
Broken gsettings-desktop-schemas:amd64 Breaks on mutter:amd64 < 3.28.4-0ubuntu18.04.2 | 3.36.4-0ubuntu0.20.04.2 @ii umH > (< 3.31.4)
  Considering mutter:amd64 2 as a solution to gsettings-desktop-schemas:amd64 79
  Upgrading mutter:amd64 due to Breaks field in gsettings-desktop-schemas:amd64
Investigating (9) mutter:amd64 < 3.28.4-0ubuntu18.04.2 -> 3.36.4-0ubuntu0.20.04.2 @ii umU Ib >
Broken mutter:amd64 Depends on gnome-settings-daemon-common:amd64 < none | 3.36.1-0ubuntu1 @un uH >
  Considering gnome-settings-daemon-common:amd64 0 as a solution to mutter:amd64 2
  MarkKeep mutter:amd64 < 3.28.4-0ubuntu18.04.2 -> 3.36.4-0ubuntu0.20.04.2 @ii umU Ib > FU=0
  Holding Back mutter:amd64 rather than change gnome-settings-daemon-common:amd64
Done
Log time: 2020-10-04 11:11:28.820557

Looks like similar issues,
Maybe I should indeed wait for a newer version to upgrade? what do you think?

File a Bug Report

There are already several similar bug reports, e.g. Bug #1898661 Bug #1898619 Bug #1898618 Bug #1898570 Bug #1898527

OK, Thanks Manfred & Bernard,
I'll wait for the bugs to be resolved.

BTW, If I flush ununtu 20 on a USB stick, and try to upgrade with it, do you expect it to work?

Several years ago (I think up to Ubuntu 12.04) there was an "alternate" CD available that offered the possibility to do an in-place upgrade. Nowadays that is not possible any more. You now have to do a complete new installation, creating a backup of your private files first for restoring afterwards.

I guess you better wait for a fix.