first of all sorry for my english...
I have an Acer Aspire 3002LCI, it's almost the same as the 5002. The chipset is a SIS m760, which is crap. It doesn't support DRI in linux ( http://www.winischhofer.at/linuxsispart1.shtml#13
). My monitor only supports 1024x768 but If you want I send you my xorg.conf .
If you want to know your monitor specs you can use "ddcxinfo-knoppix -monitor" or "sisctrl". I'm using Gentoo and they are in portage.