I'm going to set this to Won't Fix because that seems to be an important part of the solver logic, and the workarounds - running upgrade first, or using ubuntu-drivers - are easy to do and the potential for regression significantly outweighs them.
This will get solved eventually by a nicer solver (a proper optimization solver) sure, if we make it there. Lots of caveats because I'm not that clever that I want to write a competitive partial weighted maxsat or linear programming solver, so end up reusing libraries, and neither z3 nor clasp are exactly optimal (also figuring out how to get them to explain uninstallability is hard). On the other hand, I am also exploring preventing the solver (both old and new) from removing packages due to Conflicts, so removals can only happen as part of a dist-upgrade or an explicit removal request, to further reduce issues with people breaking their systems by accidentally removing half of it (caveats as to the scope with manually vs automatically installed packages, and whether packages are not needed anymore are to be). -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to apt in Ubuntu. https://bugs.launchpad.net/bugs/1992513 Title: apt will not install nvidia-driver-470-server if nvidia- driver-450-server is installed and out of date Status in apt package in Ubuntu: Won't Fix Status in nvidia-graphics-drivers-450-server package in Ubuntu: New Status in nvidia-graphics-drivers-470-server package in Ubuntu: New Bug description: apt/jammy apt will refuse to install nvidia-driver-470-server if nvidia-driver-450-server is installed *and* out of date. I can reproduce this by disabling all but the jammy release pocket, installing the old n-d-450-s from there, and then enabling updates and trying to install n-v-470-s (where a new n-d-450-s is available): # libnvidia-gl-450-server has an update available root@dannf-apt-jammy:/var/cache# apt install --dry-run libnvidia-gl-470-server -o Debug::pkgProblemResolver=yes Reading package lists... Done Building dependency tree... Done 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: libnvidia-common-450-server : Conflicts: libnvidia-common libnvidia-common-470-server : Conflicts: libnvidia-common E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1992513/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
