I have Sony Vaio Fit computer with a dual boot setup of Windows 8 and Ubuntu 14.10.

After upgrading to 15.04, booting into Linux fails with a number of 'builtin file not found' errors.

I tried toggling Secure Boot but that doesn't help.

The boot-repair info is at http://paste.ubuntu.com/12101145. If anybody has a suggestions, I would appreciate.



Maybe grub is configured badly:

Create a super grub2 disk (http://www.supergrubdisk.org/super-grub2-disk/) usb drive.

Boot from the usb drive and try to start ubuntu. If it works, run update-grub and try booting without the usb drive.

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