Aha!: The log from the 8th shows this:
Apr 8 19:32:43 kernel: [ 422.245831] efivars: set_variable() failed: status=8000000000000009
Aha!: The log from the 8th shows this:
Apr 8 19:32:43 kernel: [ 422.245831] efivars: set_variable() failed: status= 800000000000000 9