14.04 boots fine on my laptop with secure boot enabled. Never had an issue with it. 14.10 will not. The laptop complains there is no boot disc available.
I have tried updating 14.04 to 14.10 without success. I have formatted the SSD and recreated the EFI partition (512MB), Swap (4096MB) and the root partition (200GB), formatted as normal to BTRFS.
A 14.10 USB installation stick will boot but but the SSD will not.
The BIOS settings are unchanged between versions.
I have now put 14.04 back on and all is well, but want to upgrade.
Can anyone help?