x200 ultrabase external monitor - blurry

[misiekII]

Hi

My system: x200tablet+ultrabase, winXP tablet edition.

I've similar problem to this http://forum.thinkpads.com/viewtopic.ph ... 49&start=0 :
if I connect external monitor (iiyama 20" 1680x1050) directly to VGA output on x200 everything is ok. It changes when I use VGA output on ultrabase - screen is blurry.
There is a great site http://www.techmind.org/lcd/phasexplan.html describing issues of connecting digital monitor (lcd) to analog output (vga). I found out that my system has problem with incorrect phase. Self/auto-tuning on monitor helps for max minute only. I guess phase coming from ultrabase isn't time constant.

I've tried to use different (good) vga cable, place ultrabase and monitor far away from any electric devices, disconnect all devices from USB, drive slot etc - still have blurry screen. The same on battery.

Anyone has similar problem?
Regards