W510 - nVidia 880M - GPU throttle not working any more

Hi everybody,
my W510 (2 month old) used to throttle down the GPU from maximum performance (550/790 MHz GPU and Memory) to lower values (135 Mhz or something) when the GPU was nearly in idle mode. I don't know when it sopped working, but today I realized the GPU staying in high performance mode all the time.
I tried the things below but none worked so far:
- changing through the different power schemes
- updating the video driver with Lenovo update tool
- installing the video driver from nVidia (using clear install option)
It has to be a software issue since I can manually change the clock using a tool called Powermizer Manager. But the "Auto" mode is not working any more. I watched the GPU clock with GPU-z.
Any ideas where I might have a look? I'm currently running the most recent Lenovo video driver.
Thanks,
Andy.

This is the response from AirDisplay ==>>>
Hello,
My apologies for this issue. It's a bug we are aware of. It stems from an issue with OS X. Certain Macs that have a third party video driver installed will exhibit this issue. So, it's not just Air Display that causes this problem but other apps like Display Link, AirParrot, etc. will also have this issue. Apple has contacted us regarding the problem and they're looking into it. It's not actually something we or those other third party developers can fix. Apple has to address the issue with OS X. Hopefully they'll fix it soon.
Elliot
Customer Support
Avatron Software, Inc.
[email protected]

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W510 - nVidia 880M - GPU throttle not working any more

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