[mythtv-users] NVidia HDMI overscan

[Richard Woelk]

On 4/7/2012 8:33 PM, Erik Jensen wrote:
> On Sat, Apr 7, 2012 at 6:57 PM, Phil Bridges<gravityhammer at gmail.com>  wrote:
>> On Sat, Apr 7, 2012 at 9:34 PM, Joey Morris<rjmorris at nc.rr.com>  wrote:
>>> Bob<mythtv at cox.net>  wrote on Sat, Apr 07, 2012 at 12:03:12PM -0700:
>>>> I have my frontend (GT210) connected to an AV receiver (Onkyo) via
>>>> HDMI then to my TV also using HDMI.  The problem I am having is the
>>>> I am not able to see the entire image, it appears to be "cut off"
>>>> all the way around.
>>>>
>>>> I've done many searches, most people having this issue are using a
>>>> DVI to HDMI adapter, which I am not.
>>>>
>>>> I have looked at the settings in both my TV and AV receiver, but I
>>>> cannot make an adjustment for this.  I'd appreciate any suggestions.
>>> Some TVs have undefeatable overscan, others have a setting to turn it
>>> off. Double check your TV's manual and all the menu options carefully.
>>>
>>> I have one TV with undefeatable overscan when using HDMI. It does not
>>> overscan when using VGA, however, so I connect my frontend to that TV
>>> using the VGA port.
>> Sometimes, flat panels will have one HDMI input with undefeatable
>> overscan, and another that will let you adjust it.
> Others don't have an explicit setting for it at all, but disable
> overscan if you label the input as a computer.
>

Make sure you are running at native resolution of your TV. if not 1920x1080, Some are 
1366x768, and some are 1360x768

To test this, open this page in a browser http://www.lagom.nl/lcd-test/clock_phase.php
The checkerboard pattern should be smooth with no moire patterns

Once you have native resoltion, check the aspect modes on the tv for a non-overscanned 
one. If none exist, then pick the one that keeps the 1:1 native pixel mapping and adjust 
mythtv's GUI to fit in iside it. Setup, Settings, Appearance. I have a rear-projection TV 
that is overscanned optically. I have set myth to 1866x1054 out of native 1920x1080.

Hope this helps
- Richard