I've had occasional instances of seeing DMA Error 0x0000000b with my two
PVR-250s recording to the local hard disk using ivtv-0.4.6 on Ubuntu 5.10
and 6.06. I've have disabled powernowd and don't run any other cpu freq or
RAID software that has been mentioned as causing this error (would LVM
make a difference?). The errors result in corrupt recordings until I do a
cold reboot of the machine. Tonight I had the following errors in my
syslog while recording two shows. ivtv1 continued recording without
problem.

Sep 13 19:08:43 localhost kernel: [17424907.364000] ivtv0 warning: ENC:
(0) DMA Error 0x0000000b
Sep 13 19:10:47 localhost kernel: [17425030.992000] ivtv0 warning: ENC:
REG_DMAXFER 2 wait failed
Sep 13 19:10:53 localhost kernel: [17425037.028000] ivtv0 warning: ENC:
DMA still Pending while stopping capture!

I can't recall seeing DMAXFER previously or having the recording stop like
this. Any reason I would be seeing this if I'm not using cpu frequency
changing software?

Thanks,
Bob C


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