[mythtv-users] DMA buffer DeQueue failed!
Gary Raposo
gary at raposo.ca
Mon Nov 3 02:01:46 EST 2003
Hi guys,
Been working on this all night and making absolutely no progress. It's 2am
so I thought I'd bounce it off you guys and try some more tomorrow.
MythTV 0.12
Latest IVTV CVS tarball
ALSA 0.9.8
RedHat Linux 9
Asus Pundit 2.4GHz/512MB/120GB/2xPVR250
My problems started when I attempted to upgrade IVTV in order to get some
better quality out of my cable line. The upgrade seemed to have worked
just fine BUT I started noticing dropped frames... very noticeable! Whole
chunks of the stream appeared to have been chopped right out. In any case,
/var/log/messages logs the following errors continuously while
recording. The CPU is sitting at almost 99% idle and there is no paging
during this time yet I still log buffer errors.
...
Nov 3 01:51:02 mythtv kernel: ivtv: Nov 3 01:51:02 mythtv kernel: ivtv:
DMA buffer DeQueue failed! got 1, want 1
Nov 3 01:51:02 mythtv kernel: ivtv: DEC: free_q: 0 elements
Nov 3 01:51:02 mythtv kernel: ivtv: DEC: dma_q: 0 elements
Nov 3 01:51:02 mythtv kernel: ivtv: DEC: full_q: 100 elements
Nov 3 01:51:20 mythtv kernel: ivtv: DMA buffer DeQueue failed! got 1, want 1
Nov 3 01:51:20 mythtv kernel: ivtv: DEC: free_q: 0 elements
Nov 3 01:51:20 mythtv kernel: ivtv: DEC: dma_q: 0 elements
Nov 3 01:51:20 mythtv kernel: ivtv: DEC: full_q: 100 elements
Nov 3 01:51:38 mythtv kernel: ivtv: DMA buffer DeQueue failed! got 1, want 1
Nov 3 01:51:38 mythtv kernel: ivtv: DEC: free_q: 0 elements
Nov 3 01:51:38 mythtv kernel: ivtv: DEC: dma_q: 0 elements
Nov 3 01:51:38 mythtv kernel: ivtv: DEC: full_q: 100 elements
Nov 3 01:51:56 mythtv kernel: ivtv: DMA buffer DeQueue failed! got 1, want 1
Nov 3 01:51:56 mythtv kernel: ivtv: DEC: free_q: 0 elements
Nov 3 01:51:56 mythtv kernel: ivtv: DEC: dma_q: 0 elements
Nov 3 01:51:56 mythtv kernel: ivtv: DEC: full_q: 100 elements
Nov 3 01:52:15 mythtv kernel: ivtv: DMA buffer DeQueue failed! got 1, want 1
Nov 3 01:52:15 mythtv kernel: ivtv: DEC: free_q: 0 elements
Nov 3 01:52:15 mythtv kernel: ivtv: DEC: dma_q: 0 elements
Nov 3 01:52:15 mythtv kernel: ivtv: DEC: full_q: 100 elements
Nov 3 01:52:33 mythtv kernel: ivtv: DMA buffer DeQueue failed! got 1, want 1
Nov 3 01:52:33 mythtv kernel: ivtv: DEC: free_q: 0 elements
Nov 3 01:52:33 mythtv kernel: ivtv: DEC: dma_q: 0 elements
Nov 3 01:52:33 mythtv kernel: ivtv: DEC: full_q: 100 elements got 1, want 1
Nov 3 01:51:02 mythtv kernel: ivtv: DEC: free_q: 0 elements
Nov 3 01:51:02 mythtv kernel: ivtv: DEC: dma_q: 0 elements
Nov 3 01:51:02 mythtv kernel: ivtv: DEC: full_q: 100 elements
Nov 3 01:51:20 mythtv kernel: ivtv: DMA buffer DeQueue failed! got 1, want 1
Nov 3 01:51:20 mythtv kernel: ivtv: DEC: free_q: 0 elements
Nov 3 01:51:20 mythtv kernel: ivtv: DEC: dma_q: 0 elements
Nov 3 01:51:20 mythtv kernel: ivtv: DEC: full_q: 100 elements
Nov 3 01:51:38 mythtv kernel: ivtv: DMA buffer DeQueue failed! got 1, want 1
Nov 3 01:51:38 mythtv kernel: ivtv: DEC: free_q: 0 elements
Nov 3 01:51:38 mythtv kernel: ivtv: DEC: dma_q: 0 elements
Nov 3 01:51:38 mythtv kernel: ivtv: DEC: full_q: 100 elements
Nov 3 01:51:56 mythtv kernel: ivtv: DMA buffer DeQueue failed! got 1, want 1
Nov 3 01:51:56 mythtv kernel: ivtv: DEC: free_q: 0 elements
Nov 3 01:51:56 mythtv kernel: ivtv: DEC: dma_q: 0 elements
Nov 3 01:51:56 mythtv kernel: ivtv: DEC: full_q: 100 elements
Nov 3 01:52:15 mythtv kernel: ivtv: DMA buffer DeQueue failed! got 1, want 1
Nov 3 01:52:15 mythtv kernel: ivtv: DEC: free_q: 0 elements
Nov 3 01:52:15 mythtv kernel: ivtv: DEC: dma_q: 0 elements
Nov 3 01:52:15 mythtv kernel: ivtv: DEC: full_q: 100 elements
Nov 3 01:52:33 mythtv kernel: ivtv: DMA buffer DeQueue failed! got 1, want 1
Nov 3 01:52:33 mythtv kernel: ivtv: DEC: free_q: 0 elements
Nov 3 01:52:33 mythtv kernel: ivtv: DEC: dma_q: 0 elements
Nov 3 01:52:33 mythtv kernel: ivtv: DEC: full_q: 100 elements
...
Has anyone ever seen this? No luck googling these errors. Not too sure if
this is something I should take up on the IVTV list or not.
Thanks.
Gary Raposo gary at raposo.ca
Eschew obfuscation... http://www.raposo.ca
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