How to switch the display to portrait mode with a Matrox controller

Solution Verified - Updated -

Issue

  • Machine has a Matrox graphics controller (e.g. G200eW3)
  • User switches the display to portrait mode
  • The IO (mouse and keyboard) doesn't respond and the OS appears to be stuck/hung

Environment

  • Red Hat Enterprise Linux (RHEL) 8.8 and later

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