[mythtv-users] Some issues with pvr150 cards

Thomas Fjellstrom tfjellstrom at shaw.ca
Sun Oct 19 09:06:50 UTC 2008


On Friday 17 October 2008, Thomas Fjellstrom wrote:
> 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.

Anybody at all know what might cause these issues?

-- 
Thomas Fjellstrom
tfjellstrom at shaw.ca


More information about the mythtv-users mailing list