Check with Compaq for latest drivers for your machine. But then again, since it's waking up, you may be patient for it to complete it's wakeup.
I have an HP Compaq nx8220. When it wakes from stand-by the display resolution briefly changes from 1680 x 1050 (which is my working resolution) to 800 x 600. After a couple of seconds the original resolution is back. This is annoying because all open windows are reduced size. I am running XP with SP2.