Enable display on 1920x1200 Monitor

• As root from the terminal console execute the command

gtf -v 1920 1200

The following lines are displayed:

# 0x1920 @ 1200.00 Hz (GTF) hsync: 6780.00 kHz; pclk: 0.00 MHz
Modeline "0x1920_1200.00" 0.00 0 0 0 0 1920 1921 1924 5650 -HSync +Vsync

• Copy the line begining with Modeline and insert it in the file /usr/X11/xorg.conf

under the Monitor section
Section "Monitor"
Identifier "Monitor0"
VendorName "Unknown"
ModelName "CRT-1"
HorizSync 31.5 - 90.0
VertRefresh 59.9 - 60.1
ModeLine "1920x1200_60.00" 193.16 1920 2048 2256 2592 1200 1201 1204 1242 -hsync +vsync
Option "DPMS"
EndSection

• Reboot / restart the xserver