[mythtv-users] Computer can't read EDID from Panasonic TC-P42C1

[John Pilkington]

On 12/03/13 18:31, Michael T. Dean wrote:
> On 03/12/2013 01:58 PM, gcsa60 wrote:
>> Thanks Jedi,
>>
>> I have messed around with the settings in MythTV although they don't
>> quite work as I intuit them. For example if I use the screen wizard
>> and set it to 1024x768 it underscans. I still have to wok it out.
>>
>> Anyway, I was still hoping to solve this problem though because I
>> would like to use the computer as a desktop when I want. Has anyone
>> encountered and solved this problem??
>
> Right.  The overscan is completely unrelated to your resolution--it's
> just something that the TV does to your signal.  When you set MythTV to
> use 1024x768 pixels, that's inside an X output of 1280x720, so it's
> basically just putting a black border around MythTV that's too big for
> the amount of overscan your TV is doing.  To adjust for overscan in
> MythTV, you need to adjust MythTV's GUI and/or video size so that it
> just fits inside the visible display area of your TV--and don't feel
> constrained by any arbitrary numbers (such as input mode resolution
> (1280x720) nor physical screen resolution (1024x768) nor any others that
> may seem important).
>
> Note, though, that it's critical that your X configuration is specified
> such that your aspect ratio is correct--i.e. if you have a widescreen
> TV, it should be a widescreen aspect ratio in X.
>
> Other than that, you choose the most appropriate input mode allowed by
> your TV--the one that gives you the best picture.  On some TVs, that's
> using a 1:1 pixel mode, but some TVs don't allow that (none of their
> input modes correspond to the number of "physical" pixels on the TV).
> Some (most?) TVs have overscan, some allow adjusting the overscan in
> menus (or "hidden" setup menus), some do not and require you to adjust
> for it (either in a particular application, such as MythTV, or with the
> entire display--configuring X to underscan in the signal it outputs).
>
> Mike

I recently found how to drive my Panasonic TV at full resolution.  It's 
at the end of this thread.  It might carry over to yours.

http://www.gossamer-threads.com/lists/mythtv/users/540160#540160

John P