Monitor attached to Display Port connector does not wake up with rhel6.7 kernel (2.6.32-573)

Solution Verified - Updated -

Issue

  • Monitor attached to Display Port (DP) connector does not wake up from blank state.
  • No problem observed with same monitor attached on DVI connector using DP-DVI converter.
  • Problem is observed only when system is booted in GUI mode and even when on GDM login screen hence no screensaver in picture.
  • Problem is specific to rhel6.7 kernel (573). No problem with rhel6.6 kernel (504).

Environment

  • Red Hat Enterprise Linux 6.7

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