MiniDP to VGA Adapter - screen flickering, even after Firmware Update

Hello,
concerning the MiniDP to VGA Adapter, I'm experiencing the same issue many other users are complaining about: When hooked up to my 22" external LCD, the screen goes black from time to time. After 1-2 seconds it's back to normal; still enervating though.
Model:
LG L227 WTP-PF (@1680x1050 + max. colors; only available refresh rate: 59,9 Hz)
MiniDP-VGA Adapter Firmware: 1.03 (current)
Mac OSX 10.5.6
MacBook Pro 15" Unibody (Late '08)
Apple Software Update says I'm up-to-date on the software side. I've read that the low refresh rate could be responsible for this. Only problem: I can't change it in System Preferences/Monitor settings. Other options than 59,9Hz are greyed out.
Any solution to this?
Thanks in advance,
Tobi
Message was edited by: GSOY

I've got almost exactly the same set up, only with a Samsung display, and I too have found that the recent adapter firmware update has not done the trick.
However, since you have a PRO, you are (maybe) in luck. The PRO has two graphics options, the 9400M (which is the same as in the MB) and the 9600M GT. You switch between these by selecting "Higher Performance" or "Better Battery Life" in the Energy Saver System Preferences.
I have found that by selecting "Higher Performance" I do not get the screen blanking at all. It is slightly annoying that when taking my Mac on the move, I have to switch back to "Better Battery Life" (and hence log out) if I want to get the most out of my battery, but it is the only way I have found of ensuring a screen-blanking free experience when sat at my desk using the external display.
Hope this helps.
Ade
P.S. I have a LG LCD HD TV too, and don't find I have the problem with either graphics card when using this. I only connect at "something x 768" to the TV, whereas the 22" monitor is "something x 1050", so maybe there is a problem with the 9400M driving higher resolution displays? I presume it can drive Apple's own HD displays ok though....?

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