I think your problem is nothing to do with this BIOS bug. Youn are giving a boot priority to the internal drive before the optic drive. You should override the boot order by pressing a certain key such as F2, F8 and F9 just after the booting. Refer the manual of your machine to find out this boot order override key.
My point was that I have difficulty in changing the order, changes are not permanent, and if it does boot from the CD it does not work in UEFI mode, and so I cannot use e.g. Boot Repair. Would it be harmful to use fix referred to above, or is that specific to Lenovo? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1734147 Title: corrupted BIOS due to Intel SPI bug in kernel To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1734147/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs