This problem exists on my Fujitsu-Siemens Si1848 laptop. (Core2Duo, ICH7, 
X1300, SATA HDD)
I've tried the Herd5 installer, but it fails to start the X environment.

The screen resolution is correctly detected:

(II) VESA(0): Modeline "1280x800"   71.25  1280 1328 1360 1440  800 802
808 823 -hsync -vsync

then after listing quite a few resolution combos the X server fails:
...
*(II) VESA(0): Not using built-in mode "640x480" (hsync out of range)
...
Fatal server error:
no screens found

adding the needed lines to xorg.conf fixes the problem and allows me to
install.

My laptop's DDC data is dumb as it doesn't list lower (and 'standard')
resolutions and the X server fails as it depends too much on detected
data.

The installed system successfully starts, but needs a tiny change in my
xorg.conf. The horizontal resolution is only 1080 by default, not the
correct 1280, but this is a minor problem.

-- 
X.org doesn't detect widescreen resolution
https://launchpad.net/bugs/63551

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