My new PC, running Windows 7 x64, has a GTX460 graphics card and 2 monitors, both are Samsung SyncMaster 2343 (Model 2343NW). They are both connected with the DVI using standard VGA -> DVI adapters.
The problem is that windows fails to recognise that both monitors are SyncMasters. 1 was recognised and the other was a default Non-PnP. Now, when using the NVIDIA Control panel and selecting 'Setup multiple displays' I get 1 analogue display listed along with the recognised SyncMaster. The rigorous Display Detection, fails to recognise the second display.
The display recognised as 'Analogue Display' defaults to a very low resolution. If I attempt to override it to the native resolution of 2048 x 1152, the screen goes bright with blobs and lines and slowly fades to black.
OK, so I thought, I need to update drivers.
I updated the NVIDIA drivers using Windows update option. With the monitor drivers, I downloaded the latest, installed and forced the device listed as default Non-PnP to use the new driver. Now both are listed under device manager as SyncMasters, yet the NVIDIA control panel refuses to respect this.
Using a program called Phoenix EDID designer to review the registry (as per this guide How to fix NVIDIA blurry or fuzzy screen or text caused by driver installation
) I see that, of the 2 listed displays, 1 is still shown as the default Non-PnP monitor, the other is a SyncMaster. This leads me to believe that it is not NVIDIA's fault and is in fact a Windows issue.
I did not complete that guide BTW as my issues isn't the same, I was just checking the registry info.
On further inspection of the monitors listed under device manager. I can see that the 1 driver has a 'hardware id' value of 'Default_Monitor' whereas I would expect it to be 'HSP0013'. The other monitor driver (that works) has a 'hardware id' of 'SAM0595'. I see registry entries for monitors 'HSP0013' and 'SAM0595' that refer to Samsyng SyncMaster, but under the monitor config for 'Default_monitor' I see no reference to SyncMaster.
Currently, I can get both monitors to work using the correct resolution of 2048 x 1152, only by swapping the connectors around on the card. The only issue is, and its a big one, is that I have to get on my hands and knees and swap the connectors any time I reboot or the system powers off the monitors when power saving.
Any suggestions would be appreciated,