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Date: Mon, 12 May 1997 10:56:39 -0400
From: Randall Hopper <rhh@ct.picker.com>
To: Ralph Thomas Aussem <aussem@tu-harburg.d400.de>
Cc: multimedia@freebsd.org
Subject: Re: Problems with bt848 in FreeBSD 2.2.1
References: <19970508161741.28673@ct.picker.com> <XFMail.970509232824.aussem@mavhh.aut.tu-harburg.de>
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Ralph Thomas Aussem:
 |Randall Hopper:
 |>    1) In fxtv when you can hear the audio, play with the appearance 
 |>       controls (Input->Appearance) and see if that changes anything.
 |If I change the appearance the display changes to. If I change tuner/video
 |the video signal changes. So the control functions seems to work.

A few questions and things to try:

1) Which version of the driver are you using

2) By "the display changes too" do you mean that when you, for example, 
   adjust the brightness up, you see the screen get brighter?

3) When you change tuner/video, what visual cues do you have that anything
   happened -- you said you see the video signal change?

4) As the screen gets brighter do you see solid white or do you see any
   background static in there?

   The fact that you see something change with the appearance controls
   confirms that the driver is dumping images into the driver memory buffer.

5) Sounds like either 1) the tuner isn't tuned right, 2) the video signal 
   is somehow being disabled, or 3) there's a problem in fxtv with the
   color-space conversion code that crops up on your particular video card.

   If its one of the former two, whether you see static or not will help point
   that out.  In case its the latter, try playing with the colorbar and
   pixel swapping options with direct video disabled (which you said
   is what its defaulting to).  E.g.:

        fxtv -disableDirectV -colorbars -nobswap2Bpp

   Here's the full list of options to play with depending on your video mode:

        15bpp/16bpp MODES:  -nobswap2Bpp, -bswap2Bpp
       24bpp (3Bpp) MODES:  -nobswap3Bpp, -bswap3Bpp
     24/32bpp(4Bpp) MODES:  -nobswap4Bpp, -bswap4Bpp,
                            -nowswap4Bpp, -wswap4Bpp,

6) If your card supports it, run in other color depths (8,15,16,24,32 bits
   per pixel) and see if you get the same result.

6) Finally, please mail me the output of:

      "fxtv -debug startup", and
      "xdpyinfo"

   and which video card you're using.

Thanks,

Randall