@sergey it looks like there are two issues: 1) you mentioned that you ran into some graphical issues and from the Journal Errors there are numerous GPU faults declared.
2) During an upgrade of grub-legacy-ec2 had issues doing an upgrade. In terms of the grub-legacy-ec2 it looks like you went from: 0.7.9-48-g1c795b9-0ubuntu1~16.04.1 to 0.7.8-49-g9e904bb-0ubuntu1~16.04.4 Is this an instance actually running on ec2? is the issue still present? ** Changed in: cloud-init (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1675081 Title: package grub-legacy-ec2 0.7.9-48-g1c795b9-0ubuntu1~16.04.1 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/cloud-init/+bug/1675081/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs