[mythtv-users] Ceton InfiniTV 4 and patches to support it

Scott Stancil hoverduck at gmail.com
Thu Jul 28 22:49:00 UTC 2011

John -

Have you had any luck clearing up your issues?  I'm having a similar, but
more severe, problem.  I can't get anything to play from my Ceton with
mplayer, it just fills my dmesg buffer with these lines:

[ 1790.797475] nommu_map_single: overflow 116dce000+4096 of device mask
[ 1790.797481] nommu_map_single: overflow 116dcf000+4096 of device mask
[ 1790.797487] nommu_map_single: overflow 1170c8000+4096 of device mask
[ 1790.877361] notify_cc_check:41 WARNING: (0) NOTIFY board 0 tuner 0 pid
0xaaa out_of_sync 19000

Sometimes it will actually load a video, but it's choppy to the point of
being almost frozen.  There seems to be something wrong with the way my
system is loading the driver...when I first boot the machine mplayer just
complains about seeking backwards in a stream and hangs.  It's when I rmmod
and modprobe back the ctn91xx module that it starts throwing those errors,
but at least then it will sort of play the video.  At no point in this is
the CPU pegged.

And to make it even more frustrating, one day it worked flawlessly.  A week
or so ago I had one day when I was messing with it that it randomly just
started working, and I was able to play off of all four tuners at once.  But
then I shut down my box and when I turned it on the next day it was broken

Anyone have any suggestions?  I'm also talking this through with Ceton


On Sat, Jul 23, 2011 at 9:48 AM, John Haller <john.h.haller at gmail.com>wrote:

> I tried out Ron's patches, and it works fairly well, except for one
> problem,
> which is probably not associated with his patches.
> The picture will tear, jump, or pixelate, which is generally associated
> with
> the X process using close to 100% of one core, and the following message
> repeated in the myth front end log:
> 2011-07-22 15:59:11.236 [mpeg2video @
> 0x7fdf1e7d57a0]mpeg_decode_postinit() failure
> Single stepping the video one frame at a time has the same problem.
> I recorded the same show off the antenna at the same time, it's close to
> the
> same size (5.50 GB - cable vs 5.52 GB - antenna)
> The kernel log was also full of messages like:
> notify_cc_check:41 WARNING: (0) NOTIFY board 0 tuner 0 pid 0x1d77
> out_of_sync 2000
> This message comes out of the Ceton driver when packets don't start
> with the start
> of packet indicator 0x47, and is happening quite a bit. I rebooted,
> the out-of-sync
> messages stopped, but still get the pixelation.
> So, I'm not sure if my problem is with the card dropping packets, causing
> the
> decode to choke on the missing packets, or something else. With the
> antenna,
> the CPU for X associated core runs at 100% for about 10-15 seconds, then
> is less than 5%. For the Ceton recording, it's similar, but about 38
> seconds in,
> I start seeing chunks of the picture in places it doesn't belong, and the
> CPU spikes to 100% again. I suspect the picture is not synchronized,
> and whatever causes the X associated CPU to spike at the beginning of
> the playback is kicking in again.
> The only other thing which might be a problem is that the tuners run
> close to the
> 65C max (62.8). The signal level is -10.5 dBmv, signal to noise of 36.0 dB.
> But,
> I put a fan on it, got it down to 38C, and still lots of dropped packets.
> But,
> clear QAM off the other splitter tap works fine going directly into the TV.
> After the reboot, now I get these messages in mythfrontend log (just a
> sample, there
> are more of these message):
> 2011-07-22 18:39:17.461 Player(0): Video timing method: USleep with busy
> wait
> 2011-07-22 18:39:17.461 TV: Changing from None to WatchingRecording
> 2011-07-22 18:39:17.496 VideoOutput: Created YV12 OSD.
> 2011-07-22 18:40:22.197 AFD Error: Unknown decoding error
> 2011-07-22 18:40:22.247 AFD Error: Unknown decoding error
> 2011-07-22 18:42:37.933 Player(0): Waited 100ms for video buffers
> 2011-07-22 18:42:37.941 Player(0): Waited 100ms for video buffers
> 2011-07-22 18:44:32.052 Player(0): Timed out waiting for frames, and
>                        there are not enough free frames. Discarding
> buffered frames.
> FYI, the front/backend is a Core i7 860 @2.8 Ghz.
> John
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