[mythtv-users] Some issues with pvr150 cards

[Thomas Fjellstrom]

I'm getting the following messages from the frontend:

2008-10-17 16:03:06.468 WriteAudio: buffer underrun
2008-10-17 16:03:56.564 WriteAudio: buffer underrun
2008-10-17 16:04:15.065 [mpeg2video @ 0xb6505e88]invalid mb type in P Frame at 
35 29
2008-10-17 16:04:31.056 [mpeg2video @ 0xb6505e88]00 motion_type at 27 23
2008-10-17 16:04:31.057 [mpeg2video @ 0xb6505e88]Warning MVs not available
2008-10-17 16:06:09.643 WriteAudio: buffer underrun
2008-10-17 16:11:33.834 [mpeg2video @ 0xb6505e88]ac-tex damaged at 39 13
2008-10-17 16:15:16.846 [mpeg2video @ 0xb6505e88]ac-tex damaged at 44 7
2008-10-17 16:15:16.853 [mpeg2video @ 0xb6505e88]Warning MVs not available
2008-10-17 16:15:21.133 WriteAudio: buffer underrun
2008-10-17 16:16:42.918 DPMS Reactivated.
2008-10-17 16:16:46.524 DPMS Deactivated
2008-10-17 16:16:54.708 [mpeg2video @ 0xb6505e88]skipped MB in I frame at 27 9
2008-10-17 16:17:19.801 [mpeg2video @ 0xb6505e88]00 motion_type at 42 29
2008-10-17 16:17:41.057 [mpeg2video @ 0xb6505e88]invalid cbp at 29 29
2008-10-17 16:18:55.030 [mpeg2video @ 0xb6505e88]00 motion_type at 27 24
2008-10-17 16:19:05.336 [mpeg2video @ 0xb6505e88]ac-tex damaged at 28 5
2008-10-17 16:20:04.395 [mpeg2video @ 0xb6505e88]ac-tex damaged at 30 16
2008-10-17 16:23:28.316 [mpeg2video @ 0xb6505e88]ac-tex damaged at 8 29

It doesn't seem to be causing a lot of issues, but I occasionally get stutters 
or audio corruption. These are brand new pvr150 cards I just got for about $30 
each (I love sales). I haven't seen any DMA issues yet, but they seem to have 
the right chipset for it. lspci says:

00:08.0 Multimedia video controller: Internext Compression Inc iTVC16 
(CX23416) MPEG-2 Encoder (rev 01)
00:0a.0 Multimedia video controller: Internext Compression Inc iTVC16 
(CX23416) MPEG-2 Encoder (rev 01)

I don't see any errors in dmesg, so I think things are generally ok.. But 
those mpeg errors, warnings and Audio underruns are curious.


-- 
Thomas Fjellstrom
tfjellstrom at shaw.ca