I don't see any GRUB related errors in the log, and this have been open for a very long time.
Setting to "Incomplete" to expire in 60 days unless new information is added. ** Changed in: grub2 (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1604716 Title: package grub-pc 2.02~beta2-36ubuntu3.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 128 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1604716/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs