Your fstab shows this commented-out line: ##/dev/mapper/isw_cacfjebbfc_Volume0p2 /boot/efi vfat umask=0077 0 1
Your fdisk output does not list any /dev/mapper/isw_cacfjebbfg_Volume0 device. isw refers to Intel Software RAID. Did you previously have your system configured to use Intel Software RAID, then disable this manually without reinstalling? You must have an EFI System Partition for Ubuntu to properly manage the bootloader on an EFI system. According to your fdisk output, you have several possible candidates for this: /dev/sda2, /dev/sdb2, /dev/sdc2 (which I believe were previously part of the isw RAID mirror and likely have the same contents), and /dev/sdd2. If you can run 'sudo efibootmgr -v', it may be possible to figure out from the existing entry which disk you are booting from and that you should mount as /boot/efi. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1575305 Title: Ubuntu system broken after upgrade from 15.10 to 16.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shim-signed/+bug/1575305/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
