This is an old bug but I'm going to post anyway. I run into this on a persistent USB stick. To power off the system without these errors I run:
# sync ; poweroff -fn That is all... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1871454 Title: I/O error while writing superblock on persistent partition with Ubuntu 20.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/casper/+bug/1871454/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
