I just installed Ubuntu today. I deleted everything on my hard drive, and installed Ubuntu with efi-boot, swap, / and /home partition.
After installing and rebooting I just get the error message from the title and I have no idea why. I put my HDD in first place in the boot options.
All partitions show up fine in gparted too.
I installed 13.04 64-bit.
How can I troubleshoot this problem?