You have incorrectly modified your /etc/default/grub file. These lines need to be one line, with the quotes at the start end end of the options:
GRUB_CMDLINE_LINUX_DEFAULT= acpi=off apm=off "quiet splash" ** Changed in: grub2 (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1512148 Title: package grub-pc 2.02~beta2-9ubuntu1.4 failed to install/upgrade: subprocess installed post-installation script returned error exit status 127 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1512148/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs