While trouble shooting something else, I used the Driver Manager in kubuntu System Settings (which uses Additional Drivers) to uninstall the nvidia driver (nvidia-driver-390). After finishing the trouble shooting, I attempted to reinstall the nvidia driver via Additional Drivers, and I'm getting this error as well.
After seeing message #1, I also attempted to launched the Discover package manager, and Discover is reporting the error as well: Cannot refresh cache whilst offline. I've recently run sudo apt update && sudo apt full-upgrade, so the system appears to be up to date. Distributor ID: Ubuntu Description: Ubuntu Impish Indri (development branch) Release: 21.10 Codename: impish -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to software-properties in Ubuntu. https://bugs.launchpad.net/bugs/1946196 Title: Additional Drivers fails with pk-client-error-quark: Cannot download packages whilst offline (257) Status in software-properties package in Ubuntu: Triaged Bug description: Additional Drivers fails to install nvidia-driver-470: Error while applying changes pk-client-error-quark: Cannot download packages whilst offline (257) But the machine is ONLINE with full Internet access. WORKAROUND: sudo apt install nvidia-driver-470 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/software-properties/+bug/1946196/+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
