i have a combo -- Intel MB / NVIDIA card with two hdmi monitors plugged in.

dual boot WINDOW7 / UBUNTU 12.10

On BIOS settup, I set nvidia card as primary, not the integrated video on MB.

%xrandr
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
DVI-I-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 510mm x 287mm
1920x1080 60.0*+ 50.0
****************
HDMI-4 disconnected (normal left inverted right x axis y axis)
VGA-2 disconnected (normal left inverted right x axis y axis)
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 connected (normal left inverted right x axis y axis)
1600x900 60.0 +
****************
DP1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
HDMI3 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
DP3 disconnected (normal left inverted right x axis y axis)


Q1: Why my main monitor is detected as DVI-I-1, not HDMI1?
Q2: I see two monitors in System Setting > Display with second monitor in "OFF" state. When I apply "ON"> APPLY, ubuntu will crash.

any help or guide plase?