So this should be a bug in the Linux kernel, Direct Rendering Manager's,
Dinamic Power Management feature.

** Also affects: linux (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu)
   Importance: Undecided => Critical

** Changed in: linux (Ubuntu)
       Status: New => Confirmed

** Changed in: linux (Ubuntu)
     Assignee: (unassigned) => Alberto Salvia Novella (es20490446e)

** Changed in: linux (Ubuntu)
       Status: Confirmed => In Progress

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https://bugs.launchpad.net/bugs/881526

Title:
  AMD graphics hardware hangs with an homogeneous coloured screen or
  blank screen, and with chirp coming from the graphics card

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