** Description changed:

  [Impact]
  MAAS installs fail on systems that have EFI Variables that include a "/" in 
the name.
  
  Split out of bug 1894217.
  
  [Test Case]
  $ ls /sys/firmware/efi/efivars | grep ^Boot
  ls: reading directory '/sys/firmware/efi/efivars': Input/output error
  Boot mode select-7683c190-9523-4402-81ff-a11e93dc389c
  Boot0000-8be4df61-93ca-11d2-aa0d-00e098032b8c
  BootCurrent-8be4df61-93ca-11d2-aa0d-00e098032b8c
  BootOptionSupport-8be4df61-93ca-11d2-aa0d-00e098032b8c
  BootOrder-8be4df61-93ca-11d2-aa0d-00e098032b8c
  
- The Input/output error is the key symptom.
+ The Input/output error is the key symptom. See below to see how that
+ percolates up to MAAS install failures.
  
  [Regression Risk]
  There's a very tiny chance that someone has written code that depends on an 
the -EIO error for some reason. It's hard to guess why such a script would do 
that.

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https://bugs.launchpad.net/bugs/1899993

Title:
  EFI: Fails when BootCurrent entry does not exist

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