Preparing to unpack .../grub-pc_2.02-2ubuntu8.7_amd64.deb ... Unpacking grub-pc (2.02-2ubuntu8.7) ... Selecting previously unselected package grub2. Preparing to unpack .../grub2_2.02-2ubuntu8.7_amd64.deb ... Unpacking grub2 (2.02-2ubuntu8.7) ... Setting up grub-pc-bin (2.02-2ubuntu8.7) ... Processing triggers for man-db (2.8.3-2) ... Setting up grub-gfxpayload-lists (0.7) ... Setting up grub-pc (2.02-2ubuntu8.7) ... Gdk-Message: 19:36:32.569: frontend: Fatal IO error 11 (Resource temporarily unavailable) on X server :0. dpkg: error processing package grub-pc (--configure): installed grub-pc package post-installation script subprocess returned error exit status 1