[mythtv-users] performance and missing channels

[Michael T. Dean]

On 10/06/2004 07:23 PM, Tilman Kispersky wrote:

> Recently I posted about not being able to receive more than 2 channels.
> It was suggested that I patch my kernel and update IVTV to gain 
> support for my
> newer 250 chipset.  I have done those things and have some improvements:
>
> Encoding now takes almost no CPU (before ~ 20%)
> I now have audio on all channels, but still only static on all but 2 
> channels.
> (before, audio and video only two channels only, static and no audio 
> on the rest)
> I can change to all channels, the picture is just static even though 
> the audio comes through!
>
> Below is the output of the new IVTV driver, I updated to ck114f right 
> away.
>
> What might be blocking the other channels??

Bad ivtv options?

> How can I verify that the kernel patch worked?

See below.

> Is this a mythtv setting I am messing up?

Perhaps you're using the wrong channel table.  Have you tried both 
us-cable and us-cable-hrc?

> What could be going wrong??

If these changes don't work, I suggest trying the card in Windows to 
verify the hardware.  If it doesn't work in Windows, it's likely a bad card.

> thanks for any advice
>
>
> /etc/modutils/ivtv:
> alias char-major-81 videodev
> alias char-major-81-0 ivtv

This is good.

> options ivtv ivtv_debug=1 tuner=50
> options msp3400 once=0 simpler=1 simple=0
> add below ivtv msp3400 saa7115 tuner saa7127

Get rid of this junk.  Quoting my previous message:

> How should my modules.conf look after this? What should I set tuner 
> type=?

Only the lines:

alias char-major-81 videodev
alias char-major-81-0 ivtv

And you wouldn't set a tuner type with an ivtv-0.1.10-pre2-ckXXX release.

...

> kernel: ivtv: Setting Tuner 50
> kernel: tuner: type set to 50 (TCL 2002N)

The tuner module patch worked.  Otherwise, it would have set "tuner not 
set."