Hello, it appears the error you had during installation may have been temporary:
Aug 10 10:15:08 ubuntu finish-install: Temporary failure resolving 'th.archive.ubuntu.com' It might work if you try again. Thanks ** Information type changed from Private Security to Public -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1891014 Title: grub failed during reinstall (after electrical failure shutdown) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1891014/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs