[mythtv-users] [OT]HDMI, SPDIF, DVI Nvidia, etc

[Michael T. Dean]

On 02/19/2009 03:32 PM, Calvin Harrigan wrote:
> OK, disaster might be a bit strong.
>
> I've been looking for good information on disabling the audio portion
> of the video card output for almost a week.  My problem is with my new
> video card, when I connect it to the tv it sees that it is hdmi auddio
> capable and enables audio over the dvi->hdmi cable.  Doing so caused
> the tv to ignore the stereo analog signal that it's being fed and try
> to play the hdmi audio which is most times just crackling noises.  If
> I connect my spdif output to a little connector on the video card I
> can get audio for several applications (mythtv being one), but not
> all, worst than that after the audio stops the crackling noises begin
> again, especially after using xine.  I would really like to disable
> that hdmi audio feature, but what I've found on the nvidia forums is
> not working.
>     I'm running Linux kernel 2.6.24 with Nvidia drivers 180.29 drivers
> with a 9500GT (G96). Nvidia is rightfully claiming that the TV is
> telling the driver via it's edid (Extension Block Details really) that
> the tv has audio capabilities via hdmi. With that information I
> downloaded my TVs edid and edited it to remove all references to
> having audio and redid the checksums etc. X thinks the edid is fine,
> so does monitor asset manager, but for some reasons it seems that the
> driver still enables audio. The only way I can disable audio for sure
> is to remove the entire Extension Block, but doing so removes several
> of the extended supported modes that I use. Seems that the driver is
> only looking for the presence of an extension block and is not really
> reading into it to discern whether or not the set supports audio. I
> can send both edids the original and the patched versions if anyone
> would like to take a look.
>     Anyone have similar issues/problems?  Any input would be greatly
> appreciated, thanks.

Got a DVI input on the TV?  HDMI->DVI cable would fix it.

Mike