> every 30 seconds or so some data is dropped (enough to corrupt the > video and make the sound drop out for a second) and while this happens > my kernel logs are filled with these messages > Sep 4 16:41:06 [kernel] [4295039.887000] cx88[0]/2: cx8802_restart_queue > Sep 4 16:41:06 [kernel] [4295039.887000] cx88[0]/2: cx8802_restart_queue: queue is empty > Sep 4 16:41:06 [kernel] [4295040.064000] cx88[0]/2: queue is empty - first active > Sep 4 16:41:06 [kernel] [4295040.064000] cx88[0]/2: cx8802_start_dma w: 0, h: 0, f: 2 > Sep 4 16:41:06 [kernel] [4295040.064000] cx88[0]/2: setting the interrupt mask > Sep 4 16:41:06 [kernel] [4295040.064000] cx88[0]/2: [c5247560/14] cx8802_buf_queue - first active Well, quite by chance, I figured out what the problem was. I was recording the stream to disk, and the disk happened to be an old IDE one...and for some reason DMA hadn't been automatically enabled. I noticed that while recording DVB streams the whole server would lock up for half a second or so every 15 seconds, and this coincided exactly with the writes out to the disk. A quick check using hdparm verified that the drive was operating in PIO mode, and once I enabled UDMA the messages disappeared from my logs and the corrupt sections in the video went away! Yay :-) Hopefully this will help someone solve a similar issue in the future... Cheers, Adam. _______________________________________________ linux-dvb mailing list linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
