Make sure you have the latest drivers for your monitor under Device Manager, also make sure Acer V223W is under "DeviceManager/Displays" and not Generic or Std PnP Monitors, this can cause problems.
Now, being said that, I was having problems with my Vista loosing internet connectivity after waking up from sleep and I tried everything and then some but to no avail. The consensus on this Energy Saving thing is a toss up and many believe there are no real savings as far as the Electric Bill is concern so, all I do now is set the ScreenSaver for 10 mins and computer NEVER SLEEPS... EVER! No more internet problems here
I know, that is not a solution and I usually feel pretty angry when I can't find an answer but I have learn to choose my fights & battles wisely as of late... more so when it comes to the Quirkiness World that we call Vista
