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I have a brand new Sony Vaio Flip 15, and it takes at least 1 second to switch between GPUs, during which time my screen goes off. Is this expected? Or should the switch be instant and happen between frames?

Suppose I don't know anything about computers (and likewise I might not even be asking a question here): I would think my laptop is broken/glitchy because every time I plug or unplug the power adapter the screen goes off for 1 whole second (I'm oblivious to the fact that GPUs are switching).

Is the switch supposed to be fast?

Hennes
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trusktr
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2 Answers2

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Yes, the switch is supposed to be instantaneous. You shouldn't even know it's happening.

rob
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Optimus works by feeding the discrete GPU's output through the integrated GPU. Hence, all that is needed is to turn the dGPU on when needed and turn it off when it's not. Since the iGPU isn't being turned off to display the dGPU output, there should be absolutely no interruption whatsoever.

For more information, see the Optimus whitepaper.

bwDraco
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