Also /run/casper-md5check.json is missing in the live system, as is /var/log/installer/casper-md5check.json in the installed system.
Since this is a relatively new problem, I did see this commit, which sounds like it attempts to continue to boot while the check is running. I wonder if the problem doesn't lie here somewhere: https://git.launchpad.net/ubuntu/+source/casper/commit/?id=8415b4102e5c59064a5acff878aa2c3c8aa10e96 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1917590 Title: File integrity check at boot of install media no longer functional To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/casper/+bug/1917590/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs