Hi, For a while now we've been seeing hard freezes (ie, trying to kill the X server does nothing) on one of our Linux machines when it tries to send video via an IVC-200 cap card. It tends to occur more frequently when the load is heavier - attempting to send 2 or more 720x480 mpeg4 or h.264 streams causes it to freeze within 5-10 minutes, 4 h.261 videos make it freeze in about half an hour, and 2 261 videos makes it last about 2 days. dmesg and /var/log/messages don't give any clues. Other types of load don't seem to cause freezes, and I ran memtest86 overnight with no errors. Originally the machine was Ubuntu 8.04 64-bit, then 8.10 64-bit, then 8.10 32-bit, and the problem was seen in all 3. In all cases it was running the UQ-provided AG 3.2beta with the stock VideoProducer services. I know there was a bttv driver deadlock issue in kernels pre-2.6.24, but this is running kernel 2.6.27 so that shouldn't be the problem.
Also when sending video on that machine occasionally the stream would start to flicker, flashing an old frame alternating with the current output of the camera. Has anyone seen either of these issues before? Thanks, --Andrew
