On 06/06/2006 12:41 PM, Hans Verkuil wrote: >On Tuesday 06 June 2006 11:47, Steven Ellis wrote: > > >>Got DMA errors and MPEG artifact/corruption appearing on my Hauppauge >>PVR 150 unit with the ivtv 0.4.4 driver. Looks like similar problems >>to trac issue 049. >> >> >>Secondly - Any tips on how to best trouble shoot the issue when it >>happens. For example can I tune the PCI bus to prevent this from >>happening. >> >>Unloading/reloading driver and or firmware doesn't fix it. I have to >>power off for a couple of minutes to sort it out. >> >> > >There isn't really anything that can be done. Turn off any frequency >scaling (that solves it for some people). Every time I think I finally >have the time to investigate further something else crops up. It's only >a few people that have this problem but the core cause is probably >wrong handling of DMA errors. > > Hans > >
Hans, as one who can easily repeat this problem and we started working on it in the past, let me know when you might have some time to look into this again. (Disabling frequency scaling didn't fix it for me when the box was heavily loaded.) I've been running fine with DMA disabled, but I can't watch while the PVR-250 records due to high cpu utilization - playback stutters (low-def almost plays, HD not even close) on AMD 3400+. FYI, I believe Trac ticket 48 discusses the same core problem. Regards, Chris _______________________________________________ ivtv-devel mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-devel
