Hi, I have a MythTV backend with a Hauppauge HVR-2250 (dual tuner, ATSC?QAM, PCIe) and a Ceton InfiniTV4 (quad tuner, QAM/cable card, PCIe). Over the weekend, I started intermittently seeing corrupt recordings that were painful to watch. I eventually narrowed the problem down to when both tuners on the 2250 are active at the same time. In this case, both recordings have corruption (CRC errors, etc.). The InfiniTV4 does not appear to be affected by anything going on on the 2250. Likewise, the 2250 does not appear to be affected by anything going on on the InfiniTV4. I noticed something strange while diagnosinig the problem. When the 2250 is busy recording, top reports the CPU as being in wait for an abnormally high amount of time (~30% for one tuner busy and ~50% for both tuners busy). I don't recall seeing that before. I quickly tried a KWorld ATSC 110 on a different system and it showed no, or negligible wait time. Thinking that the 2250 was going bad, I replaced it with two KWorld ATSC 110s (single tuner, ATSC/QAM, PCI). The two 110s had the same problem as the 2250 -- corruption when both tuners are busy and unusually high wait time when either is busy. At this point, I'm suspecting a motherboard, memory or grounding issue, but would like some feedback in case there's anything I'm missing. The high wait time seems extremely odd to me. Perhaps it means something to those of you who are much more familiar with the cards and drivers. Oh, the problem appear shortly after switching to the 3.1.9 kernel. I also tried the 3.1.8 and 3.0.14 kernels to rule out software and there was no effect on the problem. David -- David Engel david@xxxxxxxxxx -- 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
