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Ubuntu HDMI HTPC Overscan

If your using a Ubuntu to setup a HTPC and would like to maximize the screen area on a TV most every time you will need to customize the resolution to fit your TV screen. You will know this when your display is too big to fit into your TV to correct this overscan issue you can create a custom resolution. The way to create a custom resolution is to add a custom ModeLine to your Ubuntu video configuration file and here you will learn how to do this. The example below works perfectly for a Mitsubusi WD-65835 65" DLP with 1080p support.

Here's what I'd do:
1.) One monitor at a time look at

xrandr --query
2.) See if it lists all most, resolutions, and refresh rates you'd like to use. If it does, there ought to be a way to auto configure it. But if not, no worries.

3.) To create or find out a modeline, use the gtf tool.To use gtf, type
gtf  <xresolution> <yresolution> <refresh rate Hz>
It will give you a modeline. Example:
$ gtf 1800 1000 60

# 1800x1000 @ 60.00 Hz (GTF) hsync: 62.10 kHz; pclk: 149.54 MHz
Modeline "1800x1000_60.00" 149.54 1800 1912 2104 2408 1000 1001 1004 1035 -HSync +Vsync

4.) That modeline should be directly usable by "/etc/X11/xorg.conf". Example:

Section "Monitor"
Identifier "Configured Monitor"
ModeLine "1800x1000_60.00" 149.54 1800 1912 2104 2408 1000 1001 1004 1035 -HSync +Vsync

Section "Screen"
Identifier "Default Screen"
Monitor "Configured Monitor"
Device "Configured Video Device"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1800x1000_60.00" "800x600" "720x400" "640x480"

5.) After editing xorg.conf, just restart X. Press Control-Alt-Backspace, or if you're using the terminal, use:

sudo /etc/init.d/gdm restart

...Or simply reboot your system!

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