Also Unable to upgrade from Mint 21.3 to Mint 22

Start by reproducing sudo /usr/lib/linuxmint/mintupgrade/checks.py with the repositories shown in official-package-repositories.list and the proxy settings in /etc/apt/apt.conf.d/01proxy. Read the checks implemented in checks.py and compare their endpoint checks with the successful apt install behavior. Done means the reported Mint and Ubuntu repository checks behave correctly behind the stated proxy, or the limitation is clearly documented.

Hi,

i've read the issues on your repo. I have also problems to upgrade Linux Mint 21.3 to 22 with mintupgrade tool. I have checked my official-packages-repositories.list multiple times. I got follow message, when i run the check.py.
It looks like the Issue #10 .

sudo /usr/lib/linuxmint/mintupgrade/checks.py
Die folgenden Probleme wurden gefunden:
    ['https://ftp.halifax.rwth-aachen.de/linuxmint/ ist nicht erreichbar']
    ['http://archive.ubuntu.com/ubuntu unterstützt noble nicht']
    ['http://archive.ubuntu.com/ubuntu unterstützt noble-updates nicht']
    ['http://security.ubuntu.com/ubuntu unterstützt noble-security nicht']
    ['http://archive.ubuntu.com/ubuntu unterstützt noble-backports nicht']

I changed the ftp.halifax...... in packages.linuxmint.com and fastly.linuxmint.io but the failure won't gone. My system is behind an proxy. I've configure proxy settings in synaptic, in the /etc/apt/apt.conf.d/01proxy with the following settings:

Acquire::https::proxy "http://111.122.133.144:8080/";
Acquire::http::proxy "http://111.122.133.144:8080/";
Acquire::ftp::proxy "http://111.122.133.144:8080/";

and with env-variables for root and also my username:

tfp_proxy=http://111.122.133.144:8080
http_proxy=http://111.122.133.144:8080
https_proxy=http://111.122.133.144:8080
FTP_PROXY= ...
HTTP_PROXY= ...
HTTPS_PROXY= ...

The wget - configurations:

cat /etc/wgetrc
...
https_proxy = http://111.122.133.144:8080
http_proxy = http://111.122.133.144:8080
ftp_proxy = http://111.122.133.144:8080

use_proxy = on
...

The "normal" package installations with apt install <package_name> has no problems.

inxi -r outputs:

inxi -r
Repos:
  No active apt repos in: /etc/apt/sources.list
  No active apt repos in: /etc/apt/sources.list.d/additional-repositories.list
  Active apt repos in: /etc/apt/sources.list.d/official-package-repositories.list
    1: deb https://ftp.halifax.rwth-aachen.de/linuxmint/ virginia main upstream import backport
    2: deb http://archive.ubuntu.com/ubuntu jammy main restricted universe multiverse
    3: deb http://archive.ubuntu.com/ubuntu jammy-updates main restricted universe multiverse
    4: deb http://security.ubuntu.com/ubuntu jammy-security main restricted universe multiverse
    5: deb http://archive.ubuntu.com/ubuntu jammy-backports main restricted universe multiverse

uname:

uname -a
Linux srv-01 5.15.0-118-generic #128-Ubuntu SMP Fri Jul 5 09:28:59 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux