[Bug 90179] New: dpms/blanking does not work with current git on HD 5500

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90179

            Bug ID: 90179
           Summary: dpms/blanking does not work with current git on HD
                    5500
           Product: xorg
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/intel
          Assignee: chris at chris-wilson.co.uk
          Reporter: xhejtman at fi.muni.cz
        QA Contact: intel-gfx-bugs at lists.freedesktop.org

The current git head on my Intel HD 5500 is broken with respect to
blanking/DPMS. If I do xset s activate, screen goes blank and unblanks
immediatelly (even with sleep 1 before xset), the same for xset dpms force off.
Also automatic blanking/DPMS only shortly flashes with black screen and returns
display back.

xset q looks like:
Screen Saver:
  prefer blanking:  yes    allow exposures:  yes
  timeout:  600    cycle:  600
DPMS (Energy Star):
  Standby: 180    Suspend: 180    Off: 300
  DPMS is Enabled
  Monitor is On

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