Having a problem with a toshiba m55 note monitor randomly cycling through 1280/768 to 640/480 resolutions. Some times it stops at th 640/480 and has to be manually reset back to the preset 1280/768 resolution (32k true color settings). On XP SP3 (5.1.2006) with 220.127.116.1164 express chip set driver for the 915GM in 915GM/GMS,910GML express chip family set. Was having problem originally with the 18.104.22.16843 driver delivered with notebook. Not saying driver is at fault. Wanting to understand how to start trouble shooting this strange phenomena? Thx.