Forwarding this Ubuntu bug report:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/154945

Original report:
"Fresh install of Ubuntu 7.10/Gutsy Gibbon.

X.org "intel" driver can't do 1600x1200 @ 60 Hz, monitor says "OUT OF RANGE". 1280x1024 works.
Added modeline for 1600x1200 manually, no improvement.
Changed driver to "i810" and it works (with modeline).

Packages:
- xorg, 7.2-5ubuntu13
- xserver-xorg-video-intel, 2.1.1-0ubuntu9
- xserver-xorg-video-i810, 1.7.4-0ubuntu5

Hardware:
- AOpen i915GMm-HFS motherboard.
- Intel 915 GM graphics (xorg.conf: Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller).
- LG 2010B LCD monitor.

Xorg.0.log files saved for both drivers."

Xorg.0.log (-intel): http://launchpadlibrarian.net/10082198/Xorg.0.log.intel
Xorg.0.log (-i810):  http://launchpadlibrarian.net/10082199/Xorg.0.log.i810
ddcprobe:            http://launchpadlibrarian.net/10106395/ddcprobe.txt

From the logs the EDID looks funky:

(II) intel(0): Supported VESA Video Modes:
(II) intel(0): 720x400@70Hz
(II) intel(0): 640x480@60Hz
(II) intel(0): 640x480@75Hz
(II) intel(0): 800x600@60Hz
(II) intel(0): 800x600@75Hz
(II) intel(0): 832x624@75Hz
(II) intel(0): 1024x768@60Hz
(II) intel(0): 1024x768@75Hz
(II) intel(0): 1152x870@75Hz
(II) intel(0): Manufacturer's mask: 0
(II) intel(0): Supported Future Video Modes:
(II) intel(0): #0: hsize: 1280  vsize 1024  refresh: 60  vid: 32897
(II) intel(0): #1: hsize: 1152  vsize 864  refresh: 75  vid: 20337
(II) intel(0): #2: hsize: 1024  vsize 768  refresh: 85  vid: 22881
(II) intel(0): #3: hsize: 800  vsize 600  refresh: 85  vid: 22853
(II) intel(0): #4: hsize: 640  vsize 512  refresh: 60  vid: 32817
(II) intel(0): Supported additional Video Mode:
(II) intel(0): clock: 130.9 MHz   Image Size:  518 x 324 mm
(II) intel(0): h_active: 1600  h_sync: 1620  h_sync_end 1700 h_blank_end 1780 h_border: 0
(II) intel(0): v_active: 1200  v_sync: 1201  v_sync_end 1204 v_blanking: 1225 v_border: 0
(II) intel(0): Ranges: V min: 56  V max: 85 Hz, H min: 28  H max: 80 kHz, PixClock max 140 MHz
(II) intel(0): Monitor name: L2010B
(II) intel(0): Monitor name: 
(II) intel(0): EDID (in hex):
(II) intel(0): 	00ffffffffffff001e6d2b4e9e270000
(II) intel(0): 	0b0e01038e291f78ea60e5a3574b9c25
(II) intel(0): 	115054a56a808180714f615945593180
(II) intel(0): 	010101010101213340b460b019401450
(II) intel(0): 	130006442100001e000000fd0038551c
(II) intel(0): 	500e000a202020202020000000fc004c
(II) intel(0): 	32303130420a202020202020000000fc
(II) intel(0): 	000a202020202020202020202020006d
(II) intel(0): EDID vendor "GSM", prod id 20011