You can try to open Advanced Settings and enable the Delay DDC after wake experimental setting: Some monitors have firmware bugs and don't react well to DDC commands. The flash you see comes from Lunar detecting this zero-gamma problem in the background, and applying a default Gamma table forcefully to avoid being stuck with a blacked out display. This should be a completely normal use case, and the call should simply do nothing if the gamma tables are already at their default values.īut for unknown reasons, this API call will sometimes set all RGB Gamma tables to 0 and all colors will show up as black. The bug is usually triggered when Lunar tries to reset the gamma tables to their default values by calling the CGDisplayRestoreColorSyncSettings() system method. This usually happens when custom color profiles are used, but it was reported on some default monitor profiles as well. If that doesn't fix the issue, you can try to disable the usage of Gamma completely from Advanced Settings
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