shim update deletes uefi boot option, pc not booting

[Zsolt Farago]

Latest shim update on ubuntu 14.04LTS (shim-signed:amd64 1.33.1~14.04.2+13-0ubuntu2) deleted grubx64.efi boot option - resulting the loss of boot capability.

The earlier shim update also resulted in loss of boot capability, but then shim did not delete any uefi boot option, only changed boot order - so I was able to restore boot by changing the default boot option.

[Daniel van Vugt (vanvugt)]

Ubuntu 14.04 reached end of standard support in April 2019:

  https://wiki.ubuntu.com/Releases

If you would like to continue with free support then please update to a
newer Ubuntu version and tell us if the problem still occurs.

If you would like to continue with Ubuntu 14.04 then there is a paid
support option detailed at https://www.ubuntu.com/esm