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Unwatchable picture
http://forum.linhes.org/viewtopic.php?f=6&t=17371		 Page 1 of 1
Author:  theabbos [ Sun Dec 02, 2007 7:24 pm ]
Post subject:  Unwatchable picture
Knoppmyth R5F27

Radeon 9600 SE Video Card

Display is fine when hooked up to a computer monitor via the VGA connection. Menu display and TV watching both good.

However when I shut down the system and reconnect it to my TV via an S Video connection the display, both menu and TV, are distorted beyond recognition.

Any help is appreciated.
Author:  grante [ Mon Dec 03, 2007 11:13 am ]
Post subject: 
You're probably running at a resolution or scan-rate that your
TV-encoder chip can't handle. Check the docs for your video
card to see what resolutions are acceptable for the S-Video
output.

640x480 at 60Hz usually works the best.

NB: I've had inconsistent luck getting TV-out to work on ATI
stuff. It works on my X300 chipset but I could never get it
to work on my 7100 chipset. OTOH, NVidia TV-out has always
"just worked".
Author:  theabbos [ Mon Dec 03, 2007 6:37 pm ]
Post subject:  How to change screen resolution
While I look on this forum, is there a quick answer on how to change the output resolution like you suggested?
Author:  grante [ Mon Dec 03, 2007 7:27 pm ]
Post subject:  Re: How to change screen resolution
theabbos wrote:
While I look on this forum, is there a quick answer on how to
change the output resolution like you suggested?


# aticonfig --resolution=0,640x480
# aticonfig --vrefresh=0,59-61

You'll have to restart the X server.

Or you can edit /etc/X11/xorg.confg. The resolution is set by
the "Modes" keyword in the "Display" subsection of the "Screen"
section. The veritical refresh range you want to allow is set
by the VertRefresh keyword in the Monitor section.

There's probably a GUI method also using something like
xvidtune, but I find the command-line to be a lot easier.
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