Portrait display, GM915, graphics performance

[jensmose]

Hi
I use an Intel 915GM chipset and want to use it for portrait display.
Driver version 6.14.10.4363
I have a simple graphics application in a WinXP environment.(service pack 2 5.1.2600)
I use DirectX 9 and have a 2-dimensional application with a few (< 500) vertex points and a texture that I update 30 times/s.
This works fine in ordinary landscape orientation with below 1% cpu load, but when I switch to portrait display mode, I get a CPU load around 30% and a image with a lot of artefacts.
Does anyone have any suggestions to what I can do to get the same performance in landscape and portrait mode?

Regards
Jens Pedersen

[Chuck_De_Sylva]

Please keep in mind that this part is end of lifed (EOLed). So is 945. This part is really old. 965 will be EOLed the end of this year (2008). This means there will be no extended support for these parts. You can't make parts designed for earlier SW/OS specssupport current requirements folks (Obviously!).

Please do us both a favor and ask questions which are pertinent and refer to software development "in the here and now".