On Sat, Sep 18, 2010 at 8:58 PM, Devin Heitmueller <dheitmueller@xxxxxxxxxxxxxx> wrote: > On Sat, Sep 18, 2010 at 8:42 PM, Josh Borke <joshborke@xxxxxxxxx> wrote: >> On Sat, Sep 18, 2010 at 8:20 AM, Andy Walls <awalls@xxxxxxxxxxxxxxxx> wrote: >>> On Fri, 2010-09-17 at 18:23 -0400, Josh Borke wrote: >>>> Thanks for the response! Replies are in line. >>>> >>>> On Thu, Sep 16, 2010 at 6:48 PM, Andy Walls <awalls@xxxxxxxxxxxxxxxx> wrote: >>>> > On Wed, 2010-09-15 at 22:54 -0400, Josh Borke wrote: >>>> >> I've recently noticed some distortion coming from my hvr1600 when >>>> >> viewing analog channels. It happens to all analog channels with some >>>> >> slightly better than others. I am running Fedora 12 linux with kernel >>>> >> version 2.6.32.21-166. >>>> > >>>> > >>>> >> I know I need to include more information but I'm not sure what to >>>> >> include. Any help would be appreciated. >>>> > >>>> > 1. Would you say the distortion is something you would possibly >>>> > encounter on an analog television set, or does it look "uniquely >>>> > digital"? On systems with a long uptime and lots of usage, MPEG encoder >>>> > firmware could wind up in a screwed up state giving weird output image. >>>> > Simple solution in this case is to reboot. >>>> >>>> I'm not sure if I would classify it as "uniquely digital". The >>>> distortion happens across most of the screen with it being >>>> concentrated in the top third. Additionally shows that include black >>>> bars the top black bar is seemingly stretched and the image seems like >>>> the colors are over-saturated where they colors are brighter. >>>> Rebooting had no effect :( >>> >>> OK. >>> >>>> > 2. Have you ensured your cable plant isn't affecting signal integrity? >>>> > http://ivtvdriver.org/index.php/Howto:Improve_signal_quality >>>> >>>> The cable plant hasn't changed the signal strength or integrity as far >>>> as I know. >>> >>> OK. Keep it in the back of your mind though. >>> >>>> > 3. Does this happen with only the RF tuner or only CVBS or only SVideo >>>> > or more than one of them? If the problem is only with RF, then it could >>>> > be an incoming signal distortion problem. Do you have cable or an over >>>> > the air antenna for analog RF? >>>> >>>> I only have input for the RF tuner. I have cable for analog RF. >>> >>> Please try and test the output of a VCR or DVD play plugged into the >>> HVR-1600. (We don't need sound, just the video.) >>> >>> This will tell us if the problem happens before the CX23418 chip's >>> analog front end (i.e. in the RF and analog tuner) or not. >>> >>> >>> $ v4l2-ctl -d /dev/video0 -n >>> (List of possible inputs displayed) >>> >>> $ v4l2-ctl -d /dev/video0 -i 2 >>> Video input set to 2 (Composite 1) >>> >>> # v4l2-ctl -d /dev/video0 -s ntsc-m >>> Standard set to 00001000 >>> >>> $ cat /dev/video0 > foo.mpg >>> ^C >>> >> >> I only have S-Video but doing this produced a perfect picture. > > Before debugging any further, it might make sense to install the tuner > into a Windows box and make sure it's not just a hardware failure in > the can tuner. > > Devin > > > -- > Devin J. Heitmueller - Kernel Labs > http://www.kernellabs.com > It could be the tuner card, it is over 2 years old...Why would the analog tuner stop functioning while the digital tuner continues to work? Is it because the analog portion goes through a different set of chips? Thanks, -josh -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
