nvidia-xconfig set by hand, second monitor not recognised

[Niks]

I have a dual head video card which is has two identical monitors attached.
Nvidia settings finds only one monitor correctly and the other a much lower resolution unknown type.

What to do I need to change in nvidia-xconfig to have both screens in the same (1440x900) resolution

This problem only started with the update to with Gnome 3 .
The X.Org X server -- Nouveau display drivers were removed by Gnome 3 so I had to switch to the nvidia-glx (173.xx) .
I know this is not really a Mint issue but I can not finding anything on-line yet, that doesn't leave me with with a black screen or just just a text log in !

For the record I'm using LMDE 32 with all 5 levels updated and it's a clean install with only chrome, cheese and webcamstudio as added apps.

[Niks]

Forgot I posted this but well disappointed with not a a single reply

Truth is this a bigger problem then I thought !

I have now got a ATI X1650 card in there and have exactly the same problem!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

so please continue this here http://forums.linuxmint.com/viewtopic.php?f=191&t=96730 and If it gets solved I'll post this one solved as well!

Can't believe this problem is so hard to find answers !!!!

[mintamico]

as you said it has to do with Gnome 3, maybe this link could help you

http://gregcor.com/2011/05/07/fix-dual- ... re-broken/

[Asimov]

We need your screen configuration: xrandr -q and the version of Xrandr: xrandr -v

Xrandr is the application for the screen's detection used by Linux.

[Niks]

AH have found out that one of the monitors is not supplying it's ID info.

SO....can someone tell me how to manually set the monitor settings