Mini-HDMI to VGA does not work with projectors having long cables

Hi
I use a ThinkPad Yoga with Windows 8.1 and have problems to get a video signal to some projectors using a Mini-HDMI VGA adapter like this http://www.amazon.com/Cable-Matters-Active-Female-Adapter/dp/B00879ELGA/ref=sr_1_1?ie=UTF8&qid=13979...
Usually it works but in some lecture/presentation rooms projectors show "no signal" (I changed all possible graphic settings). There seems to be a problem with cable length because after using a VGA repeater increasing video signal strength projectors show a picture. But the problem is those VGA repeaters are quite expensive and too big (if you are travelling). Some Mini-HDMI VGA adapters have USB ports to connect them to a power source but this does not really help to increase signal strength.I find this issue very annoying because all other (older) laptops with VGA ports or MacBooks with displayport-VGA adapters do not have this problem and produce a video signal that is strong enough to connect to projectors with long cables.
My questions are:
a) Is it possible to adjust my ThinkPad hardware settings to improve signal strength?
b) If not, is there a small Mini-HDMI VGA adapter that produces a signal strong enough to connect projectors with long cables?
c) If not, is there an affordable and small VGA repeater that does the job?
Thanks!

1) that is not possible
2) Why not get a USB2VGA converter?
Regards,
Jin Li
May this year, be the year of 'DO'!
I am a volunteer, and not a paid staff of Lenovo or Microsoft

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