[Bug 1884507] [NEW] 'none' machine should use 'none' display option

[Philippe Mathieu-Daudé]

Public bug reported:

As the 'none' machine doesn't have any peripheral (except CPU cores)
it is pointless to start a display. 

'-M none' should imply '-display none'.

** Affects: qemu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1884507

Title:
  'none' machine should use 'none' display option

Status in QEMU:
  New

Bug description:
  As the 'none' machine doesn't have any peripheral (except CPU cores)
  it is pointless to start a display. 

  '-M none' should imply '-display none'.

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