philstopford Posted May 1, 2021 Share Posted May 1, 2021 Big Sur seems to be aggressive about sending displays to sleep (even after fiddling with available options in the battery control panel) and so I've noticed this quirk. Whenever the display or machine sleeps, with HDMI connected, the external monitor is not detected / utilized when the machine is woken up. Reconnecting the cable restores the external monitor. I wondered if this was due to some configuration quirk that I can address, or perhaps it's a bug in 11.3. Anyone else seen similar behavior? Link to comment Share on other sites More sharing options...
Administrators Hervé Posted May 1, 2021 Administrators Share Posted May 1, 2021 From memory, it's a general behaviour... You could try the WEG optional boot arg igfxonln=1 and see if that makes any difference. https://github.com/acidanthera/WhateverGreen Link to comment Share on other sites More sharing options...
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