I've researched many similar threads but could not find the right answer for me.
I want to install APT version of QGIS 3.10 on Linux Mint 19.2 Cinnamon. I've successfully added repository and made it signed according to official QGIS installers page
apt install qgis qgis-plugin-grass
Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies. qgis : Depends: python3-qgis (= 1:3.12.0+28bionic) but it is not going to be installed E: Unable to correct problems, you have held broken packages.
This happens after I tried:
apt autoclean apt autoremove sudo apt-get -f install
The problem persists. Any help will be much appreciated!
Okay the problem was likely in some corrupted packages from previous QGIS installation. I resolved the problem with aptitude:
sudo aptitude install qgis qgis-plugin-grass
It first destroyed some of these packages, suprisingly then ran it the second time and QGIS 3.10 was installed seemingly without problems.