I tried disabling the ISO verification check (as described in bug 1870337), but it didn't seem to help:
root@ubuntu-server:/var/log# cat /proc/cmdline BOOT_IMAGE=/casper/vmlinuz quiet --- fsck.mode=skip In fact, it seems like this method does not disable verification: root@ubuntu-server:/var/log# tail syslog Oct 12 16:15:34 ubuntu-server casper-md5check[3520]: Checking ./pool/main/o/openssh/openssh-sftp-server_8.4p1-6ubuntu2_arm64.deb..../pool/main/o/openssh/openssh-sftp-server_8.4p1-6ubuntu2_arm64.deb: OK Oct 12 16:15:37 ubuntu-server casper-md5check[3520]: Checking ./pool/main/o/openvswitch/openvswitch-common_2.16.0-0ubuntu2_arm64.deb..../pool/main/o/openvswitch/openvswitch-common_2.16.0-0ubuntu2_arm64.deb: OK Oct 12 16:15:41 ubuntu-server casper-md5check[3520]: Checking ./pool/main/o/openvswitch/openvswitch-switch_2.16.0-0ubuntu2_arm64.deb..../pool/main/o/openvswitch/openvswitch-switch_2.16.0-0ubuntu2_arm64.deb: OK Oct 12 16:15:41 ubuntu-server casper-md5check[3520]: Checking ./pool/main/o/openvswitch/python3-openvswitch_2.16.0-0ubuntu2_all.deb..../pool/main/o/openvswitch/python3-openvswitch_2.16.0-0ubuntu2_all.deb: OK Oct 12 16:15:41 ubuntu-server casper-md5check[3520]: Checking ./pool/main/o/os-prober/os-prober_1.79ubuntu1_arm64.deb..../pool/main/o/os-prober/os-prober_1.79ubuntu1_arm64.deb: OK Oct 12 16:15:42 ubuntu-server casper-md5check[3520]: Checking ./pool/main/r/reiserfsprogs/reiserfsprogs_3.6.27-4build3_arm64.deb..../pool/main/r/reiserfsprogs/reiserfsprogs_3.6.27-4build3_arm64.deb: OK Oct 12 16:15:42 ubuntu-server casper-md5check[3520]: Checking ./pool/main/w/wireless-regdb/wireless-regdb_2021.08.28-0ubuntu1_all.deb..../pool/main/w/wireless-regdb/wireless-regdb_2021.08.28-0ubuntu1_all.deb: OK Oct 12 16:15:45 ubuntu-server casper-md5check[3520]: Checking ./pool/main/w/wpa/wpasupplicant_2.9.0-21build1_arm64.deb..../pool/main/w/wpa/wpasupplicant_2.9.0-21build1_arm64.deb: OK Oct 12 16:15:45 ubuntu-server casper-md5check[3520]: Checking ./pool/main/x/xauth/xauth_1.1-1_arm64.deb..../pool/main/x/xauth/xauth_1.1-1_arm64.deb: OK Oct 12 16:17:01 ubuntu-server CRON[4427]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly) root@ubuntu-server:/var/log# -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1946773 Title: "An error occurred. Press enter to start a shell" To manage notifications about this bug go to: https://bugs.launchpad.net/subiquity/+bug/1946773/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs