#13839 (Bug) macOS Mojave – Screen saver is not disabled during calibration

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Component: ArgyllCMS 2.0.1
Created by Christoffer Arntsen Nyström

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Since upgrading to macOS Mojave (10.14), the DisplayCAL application no longer automatically stops the screen saver from starting during the calibration and profiling of the monitor. Using DisplayCAL, (several different versions) on pre-Mojave platforms the screen saver never started during the calibration process even though I had it enabled.

This should be easy enough to reproduce if indeed a bug;

  • Set a screen saver of you choice via System Preferences (I use 'Vintage Prints').
  • Set the 'Start after' to a low enough value (I have mine on 5 minutes).
  • Start DisplayCAL and start the calibration process.

Simply wait and after 5 minutes the screen saver should kick in and DisplayCAL's calibration process will as expected fail.  Luckily there is a simple workaround for this, by disabling or to set the screen saver's 'Start after' value to never before starting the calibration.


DisplayCAL-logs (application/x-gzip | 2018-09-30 20:25:21)


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