Ok this is insane, i've spent hours of my life trying to fix this (not to mention last year i had a similar problem and couldn´t fix it at that time too) and still couldn´t find a solution:
PLUG AND PLAY MONITOR on WINDOWS XP UNDER INTEL GRAPHICS SHIPSET NOT SHOWING WIDESCREEN RESOLUTION.
The amount of garbage forum results on google is insane, couldn´t find nothing useful neither on other foruns or intel and windows foruns.
I decided to come here since i believe this is more related to the drivers of intel chipset than how windows handles PnP drivers.
Anyway, the probem is quite simple: Here at my office we have some several relatively outdated computers with onboard Intel G31 chipset onboard graphics and some cheap AOC 18.5 widescreen LCD monitors, and well, I can´t make the widescreen native resolution of 1366x768 to show on windows.
On windows XP windows install the default "plug and play monitor" with lots of standards resolutions up to 2048x1536, it even has a couple of widescreen resolutions like 1280x720 and 1280x768 but it doesn´t have the Native 1366x768 of the AOC monitor.
It's important to know that the EDID of the AOC monitor WORKS PROPERLY. I've installed Powerstrip in one of those machines and all the information is there, i even generated a .IFO file for manually installing the display driver of the monitor and that is when the problem emerge.
I manually force the "plug and play monitor" to update drivers, windows complayins of it not being "digitally certified" i continue anyway and in the display properties indeed the monitor NAME changes to the "936w" showing that the IFO driver of the monitor was installed. BUT STRANGELY NOT A SINGLE OPTION OF RESOLUTION IS CHANGED!
Even more strange is that all the machines have the same problem, except two pcs with show in the display setting "generic monitor plug an play" but the correct resolutions are listed and are running in the native display panel. This machine has the same onboard intel chipset, this proves it IS POSSIBLE TO RUN THE MONITOR AT NATIVE RESOLUTION but is just utterly stupid to fix it. Why those two particular pcs show the correct resolution and the rest no, i don´t know.
Yes i've download and installed the most up to date intel driver and no it didn´t worked. (I even tried powerstrip for crying out loud!)
This seen to me as a stupid way how WINDOWS and INTEL CHIPSET SOFTWARE deals with PLUG AND PLAY DRIVERS.
Any hopes from the community?
Sorry for my english and bad mood.