yes home in another partition, partitions are /boot, swap, /, /home, dual boot with win7 screens are 2 x 24" led benq's 1920 x 1080, i had been formatting / only with the repair install, trying to set up afresh to eliminate problems with buggy package installer, it not installing stuff properly and other errors surrounding mint update.
i can only think that something in the home partition over rules the install, would that be right? (repair install)
from live dvd session nadia sees both monitors and mirrors them in correct resolutions, after install, it goes haywire, but, after much hair pulling last night i backed up all data, wiped it and re-did the whole install afresh, and encountered the same screen resolution problem, it seems that it installs vesa as default, why? (why vesa with GTS 250 and 2 x 24" screens pentium G850 and Asus P8H77-M LE with 8gb ram, modern enough?), and then i can't find clear instruction on how to change to nouveau or indeed nvidia drivers (there is a myriad of stuff out there for xorg.conf, which to me seems a better way of being able to fix things, but no nadia doesn't do it that way), i did try installing nvidia drivers, but couldn't configure it to correct screen resolution, it gave me instructions to use terminal, then that didn't work. ended up with 640x480, this whole mess shows me how difficult it still is to work with linux, i enjoy using linux, but if it has a problem?...
it also seems that in all settings>display that is a bit week, it often doesn't do anything as such to help or just doesn't do anything, it could give the user a clear idea of what is happening and a solution and actually try to remedy the situation.
anyway i have deleted the partitions and formatted ntfs for now, there is an update for ubuntu (12.04.2) out soon, might have a go at that, seems that might be less hassle as i have it on another machine without problem.
But, if you have a solution, i'd be willing to install nadia again to see if it will co-operate, thank you.