How to enable native (1360x768) resolution with lcd-tv? (edgy, nvidia)

Hello.

I cannot enable any other resolutions with my lcd-tv than 1024x768, 800x600 and 640x480 on Ubuntu Edgy Eft with nvidia drivers. I have a Nvidia Geforce 7950 GTX that is connected to the tv with a dvi->hdmi cable. The tv is "Grundig Lenaro 32" but both Ubuntu and Windows sees it as BEKO VAJZ1.

The native resolution for the screen is either 1366x768 or 1360x768, I'm not sure since I don't have the manual, and internet sources contradict each other.

Obvious parts of my xorg.conf:

Section "Monitor"
 Identifier "Monitor0"
 VendorName "BEK"
 ModelName "BEKO-VJAZ1"
 ### Comment all HorizSync and VertSync values to use DDC:
 HorizSync 31.0 - 83.0
 VertRefresh 56.0 - 76.0
 Option "DPMS"
EndSection

Section "Device"
    Identifier "NVIDIA Corporation NVIDIA Default Card"
    Driver "nvidia"
EndSection

Section "Screen"
    Identifier "Screen0"
    Device "NVIDIA Corporation NVIDIA Default Card"
    Monitor "Monitor0"
    DefaultDepth 24
# Option "UseEdidFreqs" "false"
    SubSection "Display"
        Depth 24
        Modes "1366x768" "1360x768" "1280x768" "1280x720"
    EndSubSection
EndSection

My xorg.0.log has a line like:

"(WW) NVIDIA(0): No valid modes for "1280x768"; removing."

for each of the resolutions on the line "Modes".

And then it says:

(II) NVIDIA(0): Validated modes:
(II) NVIDIA(0): "1024x768"
(II) NVIDIA(0): "800x600"
(II) NVIDIA(0): "640x480"

...which are the ones that I can change to with the gui applet for selecting resolutions.

So, any ideas? I have tried dpkg-configure and nvidia-xconfig and X -config and everything else I've seen recommended for this, but nothing seems to help.

-Kuutio