High performance GPU always used on battery power - Lightroom

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  • Updated 3 weeks ago
On 2015 and 2018 macbook pro units while on battery (and on power source) with the high performance GPU option unchecked in LR it's still using the high performance GPU as show in activity monitor
Surely it should still be using the integrated? The integrated card is powerful enough for editing and I'd imagine is more power efficient
How come it's still using/selecting the high performance GPU?
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Alex and Jenni Cluskey Smith

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Posted 3 weeks ago

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Carlos Cardona

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Maybe you have the “use graphics card” preference selected in Lightroom preferences?
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Alex and Jenni Cluskey Smith

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Definitely unchecked, checked, and unchecked again :(
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Simon Chen, Principal Computer Scientist

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How do you choose the high performance GPU option? Are you referring to the Energy Saver option in the System Preferences to allow automatic graphics switching? Like the following?

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Alex and Jenni Cluskey Smith

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I have tried with both automatic graphics switching on and off, currently it is set to on, but neither option makes any difference unfortunately
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Simon Chen, Principal Computer Scientist

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Lightroom does not pick and choose which GPU it is using. It is just using the default GPU as reported by the OS at Lightroom's launch. Lr does not support dynamic graphics switching in the middle of Lightroom application session.
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Alex and Jenni Cluskey Smith

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Whether it is the mac or it is lightroom that is choosing i don't know but it is using the integrated graphics card before LR is launched and then it switches to high performance, when lightroom is closed it switches back to integrated.
So something software based is triggering the switch