> In a nutshell: Some, but not all, of my recordings (about 1 in 10 or so) > wind up with no sound. > > My box has dual tuners (an older PVR350, and a new PVR250). > > Original config: > PVR350 > MythTV 0.16 > ivtv various, but stable with 0.2.0-rc2t for at least a month > > With the original config, no problems at all. > > Added a PVR250: > > About 2 weeks ago, I got the PVR250 card. Adding the simple tuners patch got > the kernel to recognise the new type 50 tuner. I took this time to also > upgrade the ivtv driver to the latest rc3f, and everything worked great > with dual tuners for a week. > > Upgraded to 0.17: > > After a week of dual-tuner use, MythTV was upgraded to 0.17. No problem at > first. Both tuners worked, making good streams with audio & video for both > recordings and live TV. > > The next morning, I found a recording that had no sound. I don't know which > tuner it was recorded with (how do I find out?). > > The day after that, I found another _active_ recording that had no sound. > Since this program was still recording, I could verify the tuner (it was the > 250), and also verify that 'aplay -f dat /dev/video25' produced no sound, > while the same thing with /dev/video24 did produce sound for the other > active recoding that was happening at the same time. > > There had been many instances of two programs recording simultaneously that > have worked just fine, so it's not a consistent problem. > > When the above recording on the 250 was producing no audio, I stopped the > recording then began Live TV and tuned to the same channel and got sound! I > terminated Live TV, restarted the recording, then began playing back that > recording and got sound! > > I have since then found two or three more instances of programs that > recorded with no audio. I believe it has happened on both the PVR250 & > PVR350 card, but I can't be 100% sure about that. > > To rule out the ivtv driver upgrade as the culprit, I reverted back to rc2t > which I had no problem with for a long time. Two days later, I came upon > another broken no-audio recording, so I rule out the ivtv driver. > > Any time that I have been lucky(?) enough to come accorss a no-audio > recording in progress, I have found that stopping the recording and > restarting it restores proper audio recording. This leads me to believe that > there is some ineraction between the new MythTV 0.17 and the ivtv driver > (various version) that cause an incomplete/failed initialization/channel > change. > > So, to make a long story short, I can find no clues as to why this is > happening. The backend logs show nothing of relevance (no abnormal warning > or errors) at the start of a problem recording. > > Is anybody else seeing this problem? Anybody have a clue how to begin > debugging it? I might even try to revert back to Myth 0.16 (ow, painful) > just to rule in/out 0.17 as a suspect.
I upgraded to 0.17 two nights ago and everything worked fine even after a reboot. Then yesterday after other reboots all sound output seems to have gone - no sound in recordings or live tv. I am using two cards with bt8x8 drivers so your's may not be a ivtv issue. I have not had a chance to look into this properly yet - it's possible the mixer settings have gone whacko and just need to be reset - but it's a coincidence that I had no sound problems before the upgrade, and then the day after I upgrade there's no sound at all. I'm keeping an open mind until I check into it more tonight. I'm hoping that I don't have to go back to 0.16 via a backup I took before the upgrade because everything else about 0.17 looks great so far. Anyone else had this problem? Regards, Phill
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