Hello,
I am experiencing the same problem

I have downloaded the latest driver from nvidia and it works fine ! The only problem is i cannot set the res to 1280x800. I have set the correct vertical and horizontal freqs of the monitor in the xorg.conf. Below you can see snapshots from my xorg.conf and Xorg.Log
**************************************xorg.cong***************************************************** **************
Section "Monitor"
Identifier "Monitor0"
VendorName "Sony"
ModelName "LCD Panel 1280x800"
HorizSync 31.5 - 49.0
VertRefresh 60.0 - 60.0
#ModeLine "1280x800"
#Option "FlatPanelProperties" "Scaling = aspect-scaled"
Option "dpms"
EndSection
Section "Device"
Identifier "Videocard0"
Driver "nvidia"
VendorName "nvidia"
BoardName "nVidia Geforce 6200"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
#Virtual 1280 800
Depth 24
Modes "1280x800"
EndSubSection
EndSection
**************************************xorg.cong***************************************************** **************
**************************************Xorg.0.log**************************************************** ***************
(II) Setting vga for screen 0.
(**) NVIDIA(0): Depth 24, (--) framebuffer bpp 32
(==) NVIDIA(0): RGB weight 888
(==) NVIDIA(0): Default visual is TrueColor
(==) NVIDIA(0): Using gamma correction (1.0, 1.0, 1.0)
(--) NVIDIA(0): Linear framebuffer at 0xC0000000
(--) NVIDIA(0): MMIO registers at 0xA0000000
(II) NVIDIA(0): NVIDIA GPU detected as: GeForce Go 6200
(--) NVIDIA(0): VideoBIOS: 05.44.02.09.28
(--) NVIDIA(0): Interlaced video modes are supported on this GPU
(II) NVIDIA(0): Detected PCI Express Link width: 16X
(--) NVIDIA(0): VideoRAM: 32768 kBytes
(II) NVIDIA(0): Connected display device(s): DFP-0
(--) NVIDIA(0): Display device DFP-0: maximum pixel clock at 8 bpp: 400 MHz
(--) NVIDIA(0): Display device DFP-0: maximum pixel clock at 16 bpp: 400 MHz
(--) NVIDIA(0): Display device DFP-0: maximum pixel clock at 32 bpp: 400 MHz
(II) Loading sub module "ddc"
(II) LoadModule: "ddc"
(II) Loading /usr/X11R6/lib/modules/libddc.a
(II) Module ddc: vendor="X.Org Foundation"
compiled for 6.8.2, module version = 1.0.0
ABI class: X.Org Video Driver, version 0.7
(II) NVIDIA(0): Monitor0: Using hsync range of 31.50-49.00 kHz
(II) NVIDIA(0): Monitor0: Using vrefresh value of 60.00 Hz
(II) NVIDIA(0): Clock range: 12.00 to 400.00 MHz
(II) NVIDIA(0): Not using default mode "640x350" (vrefresh out of range)
(II) NVIDIA(0): Not using default mode "320x175" (vrefresh out of range)
(II) NVIDIA(0): Not using default mode "640x400" (vrefresh out of range)
(II) NVIDIA(0): Not using default mode "320x200" (vrefresh out of range)
(II) NVIDIA(0): Not using default mode "720x400" (vrefresh out of range)
(II) NVIDIA(0): Not using default mode "360x200" (vrefresh out of range)
(II) NVIDIA(0): Not using default mode "640x480" (vrefresh out of range)
(II) NVIDIA(0): Not using default mode "320x240" (vrefresh out of range)
(II) NVIDIA(0): Not using default mode "640x480" (vrefresh out of range)
(II) NVIDIA(0): Not using default mode "320x240" (vrefresh out of range)
(II) NVIDIA(0): Not using default mode "640x480" (vrefresh out of range)
(II) NVIDIA(0): Not using default mode "320x240" (vrefresh out of range)
(II) NVIDIA(0): Not using default mode "800x600" (vrefresh out of range)
(II) NVIDIA(0): Not using default mode "400x300" (vrefresh out of range)
(II) NVIDIA(0): Not using default mode "800x600" (vrefresh out of range)
(II) NVIDIA(0): Not using default mode "400x300" (vrefresh out of range)
(II) NVIDIA(0): Not using default mode "800x600" (vrefresh out of range)
(II) NVIDIA(0): Not using default mode "400x300" (vrefresh out of range)
(II) NVIDIA(0): Not using default mode "800x600" (hsync out of range)
(II) NVIDIA(0): Not using default mode "400x300" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1024x768" (vrefresh out of range)
(II) NVIDIA(0): Not using default mode "512x384" (vrefresh out of range)
(II) NVIDIA(0): Not using default mode "1024x768" (hsync out of range)
(II) NVIDIA(0): Not using default mode "512x384" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1024x768" (hsync out of range)
(II) NVIDIA(0): Not using default mode "512x384" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1024x768" (hsync out of range)
(II) NVIDIA(0): Not using default mode "512x384" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1152x864" (hsync out of range)
(II) NVIDIA(0): Not using default mode "576x432" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1280x960" (hsync out of range)
(II) NVIDIA(0): Not using default mode "640x480" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1280x960" (hsync out of range)
(II) NVIDIA(0): Not using default mode "640x480" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1280x1024" (hsync out of range)
(II) NVIDIA(0): Not using default mode "640x512" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1280x1024" (hsync out of range)
(II) NVIDIA(0): Not using default mode "640x512" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1280x1024" (hsync out of range)
(II) NVIDIA(0): Not using default mode "640x512" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1600x1200" (hsync out of range)
(II) NVIDIA(0): Not using default mode "800x600" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1600x1200" (hsync out of range)
(II) NVIDIA(0): Not using default mode "800x600" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1600x1200" (hsync out of range)
(II) NVIDIA(0): Not using default mode "800x600" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1600x1200" (hsync out of range)
(II) NVIDIA(0): Not using default mode "800x600" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1600x1200" (hsync out of range)
(II) NVIDIA(0): Not using default mode "800x600" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1792x1344" (hsync out of range)
(II) NVIDIA(0): Not using default mode "896x672" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1792x1344" (hsync out of range)
(II) NVIDIA(0): Not using default mode "896x672" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1856x1392" (hsync out of range)
(II) NVIDIA(0): Not using default mode "928x696" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1856x1392" (hsync out of range)
(II) NVIDIA(0): Not using default mode "928x696" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1920x1440" (hsync out of range)
(II) NVIDIA(0): Not using default mode "960x720" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1920x1440" (hsync out of range)
(II) NVIDIA(0): Not using default mode "960x720" (hsync out of range)
(II) NVIDIA(0): Not using default mode "832x624" (hsync out of range)
(II) NVIDIA(0): Not using default mode "416x312" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1152x768" (vrefresh out of range)
(II) NVIDIA(0): Not using default mode "576x384" (vrefresh out of range)
(II) NVIDIA(0): Not using default mode "1152x864" (hsync out of range)
(II) NVIDIA(0): Not using default mode "576x432" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1400x1050" (hsync out of range)
(II) NVIDIA(0): Not using default mode "700x525" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1400x1050" (hsync out of range)
(II) NVIDIA(0): Not using default mode "700x525" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1400x1050" (hsync out of range)
(II) NVIDIA(0): Not using default mode "700x525" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1400x1050" (hsync out of range)
(II) NVIDIA(0): Not using default mode "700x525" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1600x1024" (hsync out of range)
(II) NVIDIA(0): Not using default mode "800x512" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1920x1200" (hsync out of range)
(II) NVIDIA(0): Not using default mode "960x600" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1920x1440" (hsync out of range)
(II) NVIDIA(0): Not using default mode "960x720" (hsync out of range)
(II) NVIDIA(0): Not using default mode "2048x1536" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1024x768" (hsync out of range)
(II) NVIDIA(0): Not using default mode "2048x1536" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1024x768" (hsync out of range)
(II) NVIDIA(0): Not using default mode "2048x1536" (hsync out of range)
(II) NVIDIA(0): Not using default mode "1024x768" (hsync out of range)
(II) NVIDIA(0): Not using mode "1280x800" (no mode of this name)
(**) NVIDIA(0): Validated modes for display device DFP-0:
(**) NVIDIA(0): Default mode "1024x768": 65.0 MHz, 48.4 kHz, 60.0 Hz
(**) NVIDIA(0): Default mode "800x600": 40.0 MHz, 37.9 kHz, 60.3 Hz
(**) NVIDIA(0): Default mode "640x480": 25.2 MHz, 31.5 kHz, 60.0 Hz
(**) NVIDIA(0): Default mode "512x384": 32.5 MHz, 48.4 kHz, 60.0 Hz (D)
(**) NVIDIA(0): Default mode "400x300": 20.0 MHz, 37.9 kHz, 60.3 Hz (D)
(**) NVIDIA(0): Default mode "320x240": 12.6 MHz, 31.5 kHz, 60.1 Hz (D)
(II) NVIDIA(0): Virtual screen size determined to be 1024 x 768
(--) NVIDIA(0): Display dimensions: (320, 200) mm
(--) NVIDIA(0): DPI set to (81, 97)
**************************************Xorg.0.log**************************************************** ***************
It seems that the driver does not support the 1280x800 mode !
Am i missing something here ?
