First off can someone setup an account on trac for me so I can update tickets 48 and 49.
Now I have been trying ivtv version 0.4.2-0.4.6, plus I've seen recent reports of the problem still being present with the 0.6.x tree. Hardware - Asus A8N-VM CSM motherboard, Athlon 64 3000+, Knoppmyth R5B7 with 2.6.15 kernel, IDE HD and either PVR150 or PVR500 capture (tried both). I also have a FreeCom USB DVB-T card, and I run a lot of media over the 100Mb network. Reproducing the problem -------------------------------- Can almost do this at will now. If I have a capture running whilst I delete a large previously captured file (about 2G) off an ext3 local volume the slight system pause during the deletion is enough to force the problem. It also seems to happen quite quickly if I'm playing a video file across the network via NFS and jump around the video stream very rapidly. Its like the ethernet i/o is preventing the DMA from the ivtv card Attempts to fix the problem ---------------------------------- 1. Turned off Cool and Quiet This was mentioned in trac ticket 48 as a possible fix. Initially appeared to reduce occurrences, but I was mistaken. No change 2. Try to change the PCI latency of the IDE devices with setpci. Doesn't work with the IDE devices on my motherboard. It uses and nforce chipset and the driver won't let you change latency values. The MythTV Wiki recommends bumping the IDE latency to avoid issues. 3. Check BIOS level timings etc Doesn't appear to be anything I can tweak in this bios. 4. Use PIO mode. Well I just tried this and my machine isn't fast enough to capture full D1 PAL in PIO mode. CPU is running 60%+ in ivtv_enc, but I still get capture issues. Possible Next Steps ------------------------ 1. Changing the size of the DMA ENC buffers Any chance increasing the buffer sizes might help matters. 2. Enable additional debug information This is where I need some feedback. What debug options should I look at enabling. I'd really appreciate any help here. The oddest part is I never had this problem with the older 0.3.x driver versions. There are quite a few people on this list and the users list with the problem. I'm sure with a bit of guidance from Hans we can track it down. Steve _______________________________________________ ivtv-devel mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-devel
