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<br><div><div>On Feb 14, 2009, at 12:58 PM, Paulin wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div class="gmail_quote">On Sat, Feb 14, 2009 at 1:35 PM, Allen Edwards <span dir="ltr"><<a href="mailto:allen.p.edwards@gmail.com">allen.p.edwards@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <br><br><div class="gmail_quote"><div><div></div><div class="Wj3C7c">On Sat, Feb 14, 2009 at 10:22 AM, Brian Wood <span dir="ltr"><<a href="mailto:beww@beww.org" target="_blank">beww@beww.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div>On Saturday 14 February 2009 11:02:41 MrVining wrote:<br> > On Feb 14, 2009, at 9:26 AM, Paulin wrote:<br> > > I'm having an old problem reappear after upgrading the NVidia<br> > > driver and then downgrading. Can't seem to figure it out.<br> > ><br> > > 1. Upgraded to 180.22 NVidia driver.<br> > > 2. Eventually downgraded back to 180.16 driver.<br> > > 3. Put the .nvidia-settingrc file back from before the upgrade<br> > ><br> > > Now whenever watching a recorded program there is a thin line<br> > > scrolling down the screen every minute or so.<br> > ><br> > > Can anyone tell me what I should be looking at to correct this. I<br> > > thought it was caused by the Nvidia settings but since they are<br> > > back to what they were before I updated/downgraded the driver I'm<br> > > not sure why it's happening.<br> > ><br> > > Any help would be appreciated.<br> > ><br> > > Thanks,<br> > > steve<br> ><br> > Is it possible that it is not driver related? Has there been any<br> > physical changes made to the system. I hear line slowly scrolling<br> > down the screen and I still jump right to grounding issue (retired<br> > cable guy).<br> <br> </div>With NTSC at least, a horizontal line scrolling slowly *up* the screen<br> indicates 60 or 120 Hz. hum. The rate is the difference between the vertical<br> rate being precisely 60Hz, and what it really is with NTSC color (in other<br> words, if 3.579545 was in fact 3.600000, then the bar would be stationary).<br> <br> A grounding issue would thus create a moving up bar, unless the scan rate of<br> the video was far enough from 60Hz. to create a downward motion of the bar.<br> <br> I tend to agree that the OP does not have a driver issue, more likely some<br> sort of interference in the machine itself, the monitor, or the cabling, or<br> some sort of common mode (ie: grounding) problem.<br> <font color="#888888"><br> --<br> beww</font></blockquote><div><br></div></div></div><div>By ground problem, likely it means that there is a difference between the computer ground and the TV ground. So, in this case you may not have done anything to the computer but if you plugged the TV in to a different slot or changed your antenna setup it could explain it. </div> <div><br></div><div>If you have cable, it could even be that the cable guy came by while you were not looking and grounded the feed.</div><div><br></div><div>I had to run power from my projector to my surround setup to get rid of a line like that. Now everything is on the same circuit. I also ground my antenna to that same sub panel. </div> <div><br></div><div>Allen</div><div> </div></div> </blockquote></div><br>OK now I'm even more confused. Sorry :)<br><br>Anyway this setup has been this way for a few months (November) and working until yesterday night when I did a few things to the box (removed GNome Network Manager, Attempted to upgrade the NVIDIA driver to 180.22, and rebuilt trunk. <br> <br>The Myth Box (Backend/Frontend) was not really touched other then to plug in a CRT for some initial work with the Driver setup.<br><br>The box is plug into a surge protector power strip that the stereo, TV, DVD and TIVO are all plugged in. The cable coming in, is split (3-way) and feeds the Tivo, and the two tuner cards in my mythbox.<br> <br>The line that I have scrolls down only. When I first configured my MythBox I had this issue and it was fixed when I got the NVidia settings correct. That may have been a cooincent.<br><br>If fixing the grounding issue what part should I look at changing. <br> <br>Thanks and sorry for my ignorance. <br>steve </blockquote><div><br></div></div>My method for trouble shooting grounding problems was to remove as many things from the equation as possible (everything connected to TV or computer). Use the computer to playback a recording, if the bar is gone, reconnect your equipment one by one and watch for the bar to come back.</body></html>