Comment 69 for bug 1871268

Was on a version of 20.04 Xubuntu, accepted an upgrade for 20.04.1 and then it said could only partial upgrade. I reluctantly did the partial upgrade and after had issues with a nvidia.ko/nvidia modeset.ko mismatch and machine would no longer boot. After several hours of trying to purge/reinstall drivers, etc, I did a fresh install of 20.04.1 and was directed to this page after. I, too, chose the normal install with 3rd party updates and driver updates checked. ZFS also chosen.

ASRock B450
GT 710
Ryzen 5

Sep 27 19:58:50 xubuntu ubiquity: #015
Sep 27 19:58:55 xubuntu /plugininstall.py: Verifying downloads ...
Sep 27 19:58:55 xubuntu /plugininstall.py: Failed to find package object for /cdrom//pool/main/g/gcc-defaults/gcc_9.3.0-1ubuntu2_amd64.deb: "Version: '9.3.0-1ubuntu2' not found."
Sep 27 19:58:55 xubuntu /plugininstall.py: Failed to find package object for /cdrom//pool/main/libx/libxcrypt/libcrypt-dev_4.4.10-10ubuntu4_amd64.deb: "Version: '4.4.10-10ubuntu4' not found."
Sep 27 19:58:55 xubuntu /plugininstall.py: Failed to find package object for /cdrom//pool/main/g/gcc-defaults/g++_9.3.0-1ubuntu2_amd64.deb: "Version: '9.3.0-1ubuntu2' not found."
Sep 27 19:58:55 xubuntu /plugininstall.py: Downloads verified successfully
Sep 27 19:58:55 xubuntu /plugininstall.py: Exception during installation:
Sep 27 19:58:55 xubuntu ubiquity: Error in function: install
Sep 27 19:58:55 xubuntu /plugininstall.py: apt_pkg.Error: E:Could not configure 'libc6:i386'. , E:Could not perform immediate configuration on 'libgcc-s1:i386'. Please see man 5 apt.conf under APT::Immediate-Configure for details. (2)
Sep 27 19:58:55 xubuntu /plugininstall.py:
Sep 27 19:58:55 xubuntu ubiquity: Get:61 http://us.archive.ubuntu.com/ubuntu focal/universe amd64 libva-wayland2 amd64 2.7.0-2 [8924 B]
Sep 27 19:58:55 xubuntu ubiquity: #015Get:62 http://us.archive.ubuntu.com/ubuntu focal/universe amd64 gstreamer1.0-vaapi amd64 1.16.2-2 [323 kB]