OK people,
Since I feel to be the one that has done the most "test configurations" for this problem, I want to share another one with you. In the begin of this thread, I wrote a long article about what I've all done to solve the resolution problem with Win7 build 7000. Shortly after that, I have had a chance to test it in another configuration. The story follows:
My old configuration, with which I couldn't get above 1600x1200 resolution in Win7 build 7000 x64 was like that: Toshiba Satellite A100-912, Intel T7400 2.16 CPU, 3GB DDR2 RAM, Intel PM945 Chipset, NVidia Geforce Go 7600. And this configuration was not able to set the native resolution of my secondary monitor (1680x1050) with Win7 build 7000 x64 but the resolution could be set within the builds 6936 and 6801 (both x64).
The new configuration was like that: Samsung NP-R560, Intel T9400 2.53 CPU, 4GB DDR3 RAM, Intel PM45 Chipset, Nvidia Geforce 9600M GT. First I was afraid to install build 7000 directly as clean install, so I installed 6936 x64 and get the resolution working as I did in the old configuration. Afterwards and after making a whole backup of the working system, I upgraded to build 7000 x64. And guess what, the resolution was set without doing anything. The native resolution 1680x1050 was there in front of me.
Conclusion:
1. The problem may be related to the NVIDIA drivers. With Geforce Go 7600, I've used various drivers from laptopvideo2go website to get the resolution, but all failed even doing the test at the custom resolution management area in Nvidia control panel. BUT I haven't tested it with the drivers released from Nvidia for notebooks (179.28) since my old graphic adapter was not supported in the original inf and I tested the system before the offical release of these drivers. So, please be free to modify the inf of the nvidia's official driver for notebooks (179.28) and try to set the resolution and get back here with the results.
2. The problem may be related to the chipset. Since my old configuration was a PM945 chipset, which is pretty old, the resolution problem may be related to the chipset drivers or the chipset itself (the 945 chipset couldn't even address 4Gb RAM together). The new PM45 chipset may be the solution for this problem.
3. The system configuration or the codecs may be the real problem. Not every hardware works with every other one in totally peaceful and successful ways. Or even the codec related installations or the codec packages itself can be the cause of such problems.
What's next?
Waiting for your comments and possible configurations and test results.
Please share them all..
Andac