I just did an update from 12.04 to 14.04 and I am now having the same issue
I get the error 3 times and after a few seconds the laptop boot properly I tried to run grub-install but I get that error grub-install: error: /usr/lib/grub/i386-pc/modinfo.sh doesn't exist. Please specify --target or --directory. I have Ubuntu 64 bits so not sure why it refers to i386 in any case that directory is not present on my laptop. Instead I have: grub-mkconfig_lib x86_64-efi ls-al total 64 drwxr-xr-x 4 root root 4096 May 30 01:13 . drwxr-xr-x 187 root root 20480 Aug 15 09:19 .. lrwxrwxrwx 1 root root 34 May 15 20:03 grub-mkconfig_lib -> ../../share/grub/grub-mkconfig_lib drwxr-xr-x 2 root root 36864 May 30 01:13 x86_64-efi Strange thing is that my laptop is not efi -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/733836 Title: "Error: file not found" when booting, then boots up anyway To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/733836/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs