I tried to upgrade my ubuntu version from 18 to 20. The upgrade process was finished, but in reality my OS was not fully upgraded. I still see the old GUI and several things do not work (backup, updates, settings window do not even open).
Then i tried to apt update and then apt upgrade my packages but i am always getting errors related with unmet dependencies.
The following packages have unmet dependencies:
account-plugin-tools : Depends: python3-gi but it is not going to be installed
appmenu-qt : Depends: libqtcore4 (>= 4:4.8) but it is not installable
apport : Depends: python3-gi but it is not going to be installed
apport-gtk : Depends: python3-gi but it is not going to be installed
aptdaemon : Depends: python3-gi but it is not going to be installed
apturl : Depends: python3-gi but it is not going to be installed
compiz-gnome : Depends: python3-gi but it is not going to be installed
gedit : Depends: python3-gi (>= 3.0) but it is not going to be installed
gnome-terminal : Depends: python3-gi but it is not going to be installed
hplip : Depends: python3-gi but it is not going to be installed
ibus : Depends: python3-gi but it is not going to be installed
language-selector-gnome : Depends: python3-gi but it is not going to be installed
libdbusmenu-qt2 : Depends: libqtcore4 (>= 4:4.7.0~beta1) but it is not installable
libnss-systemd : Depends: systemd (= 237-3ubuntu10.57)
libpam-systemd : Depends: systemd (= 237-3ubuntu10.57)
libqt4-declarative : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not installable
libqt4-designer : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not installable
libqt4-help : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not installable
libqt4-network : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not installable
libqt4-script : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not installable
libqt4-scripttools : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not installable
libqt4-sql : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not installable
libqt4-sql-sqlite : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not installable
libqt4-svg : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not installable
libqt4-test : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not installable
libqt4-xml : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not installable
libqt4-xmlpatterns : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not installable
libqtassistantclient4 : Depends: libqtcore4 (>= 4:4.8.1) but it is not installable
libqtdbus4 : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not installable
libqtgui4 : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not installable
libreoffice-common : Breaks: libreoffice-style-galaxy (>= 1:6.1~) but 1:6.4.7-0ubuntu0.20.04.8 is to be installed
Breaks: libreoffice-style-tango (>= 1:6.1~) but 1:6.4.7-0ubuntu0.20.04.8 is to be installed
libsmbclient : Depends: samba-libs (= 2:4.7.6+dfsg~ubuntu-0ubuntu2.29) but 2:4.15.13+dfsg-0ubuntu0.20.04.7 is to be installed
meld : Depends: python3-gi (>= 3.14) but it is not going to be installed
networkd-dispatcher : Depends: python3-gi but it is not going to be installed
onboard : Depends: python3 (>= 3.8~) but 3.6.7-1~18.04 is to be installed
orca : Depends: python3-gi (>= 3.18) but it is not going to be installed
pyqt4-dev-tools : Depends: libqtcore4 (>= 4:4.8.0-1~) but it is not installable
python-qt4 : Depends: libqtcore4 (>= 4:4.8.0-1~) but it is not installable
python-qt4-dbus : Depends: libqtcore4 (>= 4:4.8.0-1~) but it is not installable
python-samba : Depends: python-tdb but it is not installable
Depends: samba-libs (= 2:4.7.6+dfsg~ubuntu-0ubuntu2.29) but 2:4.15.13+dfsg-0ubuntu0.20.04.7 is to be installed
python3 : PreDepends: python3-minimal (= 3.6.7-1~18.04) but 3.8.2-0ubuntu2 is to be installed
Depends: libpython3-stdlib (= 3.6.7-1~18.04) but 3.8.2-0ubuntu2 is to be installed
python3-all : Depends: python3 (= 3.8.2-0ubuntu2) but 3.6.7-1~18.04 is to be installed
python3-all-dev : Depends: python3 (= 3.8.2-0ubuntu2) but 3.6.7-1~18.04 is to be installed
python3-aptdaemon : Depends: python3-gi but it is not going to be installed
python3-aptdaemon.gtk3widgets : Depends: python3-gi but it is not going to be installed
python3-cairo : Depends: python3 (>= 3.8~) but 3.6.7-1~18.04 is to be installed
python3-click-package : Depends: python3-gi but it is not going to be installed
python3-dbus.mainloop.pyqt5 : Depends: python3 (>= 3.8~) but 3.6.7-1~18.04 is to be installed
python3-dev : Depends: python3 (= 3.8.2-0ubuntu2) but 3.6.7-1~18.04 is to be installed
python3-distutils : Depends: python3:any (>= 3.8.2-0~)
python3-gi-cairo : Depends: python3-gi (= 3.26.1-2ubuntu1) but it is not going to be installed
python3-lib2to3 : Depends: python3:any (>= 3.8.2-0~)
python3-oneconf : Depends: python3-gi but it is not going to be installed
python3-pyatspi : Depends: python3-gi (>= 2.90.1) but it is not going to be installed
python3-pyqt4 : Depends: libqtcore4 (>= 4:4.8.0-1~) but it is not installable
python3-pyqt5 : Depends: python3 (>= 3.8~) but 3.6.7-1~18.04 is to be installed
python3-pyqt5.qtmultimedia : Depends: python3 (>= 3.8~) but 3.6.7-1~18.04 is to be installed
python3-pyqt5.qtopengl : Depends: python3 (>= 3.8~) but 3.6.7-1~18.04 is to be installed
python3-pyqt5.qtsvg : Depends: python3 (>= 3.8~) but 3.6.7-1~18.04 is to be installed
python3-pyqt5.qtwebkit : Depends: python3 (>= 3.8~) but 3.6.7-1~18.04 is to be installed
python3-renderpm : Depends: python3 (>= 3.8~) but 3.6.7-1~18.04 is to be installed
python3-reportlab-accel : Depends: python3 (>= 3.8~) but 3.6.7-1~18.04 is to be installed
python3-sip : Depends: python3 (>= 3.8~) but 3.6.7-1~18.04 is to be installed
python3-software-properties : Depends: python3-gi but it is not going to be installed
python3-systemd : Depends: python3 (>= 3.8~) but 3.6.7-1~18.04 is to be installed
qdbus : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not installable
qt-at-spi : Depends: libqtcore4 (>= 4:4.8~) but it is not installable
rhythmbox-plugin-alternative-toolbar : Depends: python3-gi but it is not going to be installed
rhythmbox-plugins : Depends: python3-gi but it is not going to be installed
samba : Depends: samba-libs (= 2:4.7.6+dfsg~ubuntu-0ubuntu2.29) but 2:4.15.13+dfsg-0ubuntu0.20.04.7 is to be installed
samba-common-bin : Depends: samba-libs (= 2:4.7.6+dfsg~ubuntu-0ubuntu2.29) but 2:4.15.13+dfsg-0ubuntu0.20.04.7 is to be installed
samba-dsdb-modules : Depends: samba-libs (= 2:4.7.6+dfsg~ubuntu-0ubuntu2.29) but 2:4.15.13+dfsg-0ubuntu0.20.04.7 is to be installed
Depends: libwbclient0 (= 2:4.7.6+dfsg~ubuntu-0ubuntu2.29) but 2:4.15.13+dfsg-0ubuntu0.20.04.7 is to be installed
samba-libs : Depends: libldb2 (>= 2:2.4.4-0ubuntu0.20.04.2) but it is not going to be installed
Depends: python3-ldb (>= 2:2.1.0) but it is not going to be installed
Depends: python3-talloc (>= 2.3.1~) but it is not going to be installed
samba-vfs-modules : Depends: samba-libs (= 2:4.7.6+dfsg~ubuntu-0ubuntu2.29) but 2:4.15.13+dfsg-0ubuntu0.20.04.7 is to be installed
smbclient : Depends: samba-libs (= 2:4.7.6+dfsg~ubuntu-0ubuntu2.29) but 2:4.15.13+dfsg-0ubuntu0.20.04.7 is to be installed
software-center-aptdaemon-plugins : Depends: python3-gi but it is not going to be installed
software-properties-common : Depends: python3-gi but it is not going to be installed
software-properties-gtk : Depends: python3-gi but it is not going to be installed
system-config-printer : Depends: python3-gi but it is not going to be installed
system-config-printer-common : Depends: python3-gi but it is not going to be installed
system-image-common : Depends: python3-gi but it is not going to be installed
systemd : Depends: libsystemd0 (= 245.4-4ubuntu3.22) but 237-3ubuntu10.57 is to be installed
totem-plugins : Depends: python3-gi (>= 2.90.3) but it is not going to be installed
ubuntu-release-upgrader-gtk : Depends: python3-gi (>= 3.8) but it is not going to be installed
ubuntu-system-service : Depends: python3-gi but it is not going to be installed
unattended-upgrades : Depends: python3-gi but it is not going to be installed
unity : Depends: python3-gi but it is not going to be installed
unity-scope-calculator : Depends: python3-gi but it is not going to be installed
unity-scope-chromiumbookmarks : Depends: python3-gi but it is not going to be installed
unity-scope-colourlovers : Depends: python3-gi but it is not going to be installed
unity-scope-devhelp : Depends: python3-gi but it is not going to be installed
unity-scope-firefoxbookmarks : Depends: python3-gi but it is not going to be installed
unity-scope-manpages : Depends: python3-gi but it is not going to be installed
unity-scope-openclipart : Depends: python3-gi but it is not going to be installed
unity-scope-texdoc : Depends: python3-gi but it is not going to be installed
unity-scope-tomboy : Depends: python3-gi but it is not going to be installed
unity-scope-virtualbox : Depends: python3-gi but it is not going to be installed
unity-scope-yelp : Depends: python3-gi but it is not going to be installed
unity-scope-zotero : Depends: python3-gi but it is not going to be installed
update-manager : Depends: python3-gi (>= 3.8) but it is not going to be installed
usb-creator-gtk : Depends: python3-gi but it is not going to be installed
xdiagnose : Depends: python3-gi (>= 3.2.0-3) but it is not going to be installed
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).
I also tried what it suggests: sudo apt --fix-broken install but gives me again the same error.
Also followed other solutions: Enable the "universe" component in updates Use Aptitude, Purging packages,
sudo apt configure -a
No matter what i tried i always end up with the unmet dependencies message
