<div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">I running ivtv .10 and <a href="http://2.6.20.1">2.6.20.1</a> kernel with mythtv<br>20.1
fixes. My issue is the picture quality on<br>channels 2, 4 and 5. I am using Comcast in New<br>England. I have tried fine tuning the channels, but<br>the defaults frequencies are the best picture I can<br>get. I don't believe this to be a mythtv issue,
<br>because mplayer /dev/video0 shows the same quality. I<br>am using a 250 and a 500 in my backend and the quality<br>is about the same on both cards.</blockquote><div><br>I had a similar problem, also with Comcast - North of Boston area, when I first setup my Myth box with a PVR-150 card about a year ago. My problems were mostly on channels 5 (ABC) and 6 (NECN). Unfortunately it was so long ago (at least for my memory) that I don't recall the exact steps I took to fix it. I believe I used the ivtv tools to tune to the channel. That gave me the frequency of the channel. Then I bumped it up by increments of 25 or 50 until I got a good picture with mplayer. I took the frequency from there, went into the mtytv-setup Channel editor, and entered the frequency instead of the channel number. The bump up was more than I could get with the fine-tuning in mythtv.
<br><br>I wouldn't totally discount the other post about a bad cable, connection, etc., but I have a feeling that Comcast does something funky with some of these low numbered channels.<br><br>Sorry I don't have my exact troubleshooting steps, but I hope this info can lead you on the right path.
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