[mythtv-users] Fix for distorted image on CRT TV

Leigh lsaunderson at blueyonder.co.uk
Tue Aug 8 22:12:25 UTC 2006

Cool Frood wrote:

>I have a standard CRT TV (Philips 20" flat screen) which I'm using
>with an NVidia FX5200 using an S-Video TV-out.  The problem that I
>face is that the image on the screen is somewhat distorted, with the
>top of the image being narrower than the bottom.  Also, the image is
>very slightly tilted clockwise.  I also noticed that the curving of
>the image at the top becomes more pronounced when the screen is
>showing brighter colours?  Is this to be expected, or is there
>something I can do to fix it?  It's not very annoying, but I'd really
>like to get an image quality close to what I can get by directly
>hooking up the cable box to the TV.
>mythtv-users mailing list
>mythtv-users at mythtv.org
I get similar effects to what you describe also using a FX5200 (replaced 
my 5600 with it as this particular card doesn't have a fan on it), but 
I'm currently only using Composite out (I keep meaning to try S-vid to 
see the quality difference but it means a bit of mucking around that I 
haven't had time to do recently).
My pic on the TV , while of a fairly good quality (I've also got a 
PVR-350 in the box that I used to use for TV out, but I now want the 
accelerated OpenGL etc for goom, xmame, stepmania  etc etc), definately 
seems to have what you describe, the top part of the picture bends in, 
and there is also a very noticeable brightening/darkening of the whole 
display when I move the cursor/highlight bar over the various menu 
options -  currently using GANT theme, so I think maybe it's linked to 
the colours displayed with the associated icons for each option.

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