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No gpu power management with external hdmi monitor


maRRRco
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Hi guys, I have a little problem.

When I connect my laptop to external monitor (sony tv) with hdmi, the gpu frequency stucks at max, and the power management doesn't work.

With the screen of the notebook all p states work so good.

Under windows I can get only 2 p states with the same external monitor and is enough to get rid of high temp, while in my mackintosh only one pstate work.

My gpu is an nvidia g105m (9300gt), I use chameleon with graphic enable yes.

Any idea to get at least two p states ?

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