I have a similar problem. For me the Ubuntu 20.04 installer would consistently crash at 90% (regardless of which hard drive I installed it to). When I followed the instructions to report the bug, it led me here.
I was able to circumvent the problem by choosing "minimal installation" and NOT "download updates while installing". That made the installation succeed. It might be caused by bad hardware on my system. I don't know. -- 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/1871268 Title: Installation fails with Could not configure 'libc6:i386'. , E:Could not perform immediate configuration on 'libgcc-s1:i386' Status in Ubuntu CD Images: Fix Released Status in apt package in Ubuntu: Confirmed Status in glibc package in Ubuntu: Invalid Status in ubiquity package in Ubuntu: Invalid Status in apt source package in Bionic: Invalid Status in glibc source package in Bionic: Fix Released Status in ubiquity source package in Bionic: Invalid Status in apt source package in Focal: Confirmed Status in glibc source package in Focal: Invalid Status in ubiquity source package in Focal: Invalid Bug description: Test Case 1. Install Ubuntu Desktop on hardware with an nVidia card and select to install 3rd party drivers 2. Proceed with installation The following error message is displayed in /var/log/syslog /plugininstall.py: Verifying downloads ... /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." /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." /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." /plugininstall.py: Failed to find package object for /cdrom//pool/main/z/zlib/zlib1g_1.2.11.dfsg-2ubuntu1_i386.deb: "Version: '1.2.11.dfsg-2ubuntu1' not found." /plugininstall.py: Failed to find package object for /cdrom//pool/main/libx/libxau/libxau6_1.0.9-0ubuntu1_i386.deb: "Version: '1.0.9-0ubuntu1' not found." /plugininstall.py: Failed to find package object for /cdrom//pool/main/libx/libxdmcp/libxdmcp6_1.1.3-0ubuntu1_i386.deb: "Version: '1.1.3-0ubuntu1' not found." /plugininstall.py: Failed to find package object for /cdrom//pool/main/libx/libx11/libx11-6_1.6.9-2ubuntu1_i386.deb: "Version: '1.6.9-2ubuntu1' not found." /plugininstall.py: Failed to find package object for /cdrom//pool/main/libx/libxext/libxext6_1.3.4-0ubuntu1_i386.deb: "Version: '1.3.4-0ubuntu1' not found." /plugininstall.py: Failed to find package object for /cdrom//pool/main/l/lm-sensors/libsensors5_3.6.0-2ubuntu1_i386.deb: "Version: '3.6.0-2ubuntu1' not found." /plugininstall.py: Failed to find package object for /cdrom//pool/main/libx/libx11/libx11-xcb1_1.6.9-2ubuntu1_i386.deb: "Version: '1.6.9-2ubuntu1' not found." /plugininstall.py: Failed to find package object for /cdrom//pool/main/libx/libxdamage/libxdamage1_1.1.5-1_i386.deb: "Version: '1.1.5-1' not found." /plugininstall.py: Failed to find package object for /cdrom//pool/main/libx/libxfixes/libxfixes3_5.0.3-1_i386.deb: "Version: '5.0.3-1' not found." /plugininstall.py: Failed to find package object for /cdrom//pool/main/libx/libxxf86vm/libxxf86vm1_1.1.4-1build1_i386.deb: "Version: '1.1.4-1build1' not found." /plugininstall.py: Downloads verified successfully ubiquity: Error in function: install /plugininstall.py: Exception during installation: /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) /plugininstall.py: ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: ubiquity 20.04.9 ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27 Uname: Linux 5.4.0-21-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu22 Architecture: amd64 CasperVersion: 1.442 Date: Mon Apr 6 20:17:07 2020 InstallCmdLine: file=/cdrom/preseed/xubuntu.seed only-ubiquity initrd=/casper/initrd quiet splash --- LiveMediaBuild: Xubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200402) ProcEnviron: LANGUAGE=es_EC.UTF-8 PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=es_EC.UTF-8 LC_NUMERIC=C.UTF-8 SourcePackage: ubiquity UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-cdimage/+bug/1871268/+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