I got a similar problem with a new 1680x1050 monitor (Philips 220EW8FB). In my
case the screen was shifted to the left (the applications item in the menu bar
was not visible) and had a wide black bar on the right side of the screen
(wider then the missing part from the left).
After using " Screens and Graphics" to load the vendors .inf file for the
monitor, I got an option for 1680x1050 at 75 Hz. Although my monitor does not
support that refresh rate at 1680x1050, I tried it. This gave a full screen
image, with interference due to the too high frequencies. Then I took the
modeline for this 75 Hz mode and downscaled the dotclock to 59 Hz refresh rate
(I took 59Hz to differentiate this new mode from the existing 60 Hz mode). That
gave me a full screen 1680x1050 at 59 Hz mode.
The modeline I now use successfully is:
modeline "[EMAIL PROTECTED]" 147.00 1680 1800 1984 2288 1050 1051 1054 1096
-hsync +vsync
This works for me on two different systems, one with GM965, the other
with GM945, both using the intel driver.
Xorg.0.log shows:
(II) intel(0): Supported additional Video Mode:
(II) intel(0): clock: 146.2 MHz Image Size: 474 x 296 mm
(II) intel(0): h_active: 1680 h_sync: 1784 h_sync_end 1960 h_blank_end 2240
h_border: 0
(II) intel(0): v_active: 1050 v_sync: 1053 v_sync_end 1059 v_blanking: 1089
v_border: 0
(II) intel(0): Monitor name: Philips 220EW
(II) intel(0): Ranges: V min: 56 V max: 76 Hz, H min: 30 H max: 93 kHz,
PixClock max 170 MHz
But the corresponding 60Hz modeline does not work (gives the contracted and
shifted image):
Modeline "1680x1050_60.00" 146.25 1680 1784 1960 2240 1050 1053 1059
1089 -hsync +vsync
--
contracted screen with 1680x1050 resolution
https://bugs.launchpad.net/bugs/148208
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