[TriLUG] Mythtv - black screen when trying to watch tv

[Owen Berry]

Have you run mythtv-setup and checked that it's setup to use the correct
card? Doesn't sound like you have an issue with the capture card as you
can cat from /dev/video0, but maybe myth is not looking at the correct
device.

Owen

On Sat, Mar 31, 2007 at 08:09:18AM -0400, Douglas Ward wrote:
> I have set up a Mythtv box running Mandriva 2007 and using a Hauppage PVR
> 350 capture card.  I have my cable line running directly into the tv input
> on the card.  The card appears to initialize properly upon boot (see
> below).  I can run cat /dev/video0 > test.mpg and watch good video/audio in
> kafffeine.  In Mythtv I can connect to the backend database, run
> mythfilldatabase and scan channels for Tuner 1.  When I try to watch tv or
> record a program all I get is a black screen.  The watch tv option goes
> black for three seconds and then exits.  I am using a 20" flat panel monitor
> that the computer is plugged directly into.  I can see the desktop on the
> monitor and would like to watch tv on top of kde (not using tv out).  When I
> pick something out of the channel guide it records but mythtv says that it
> doesn't exist in the play back screens.  Very strange.  Has anyone seen this
> kind of behavior before?
> 
> [root at mythtv douglas]# dmesg | grep ivtv
> ivtv:  ==================== START INIT IVTV ====================
> ivtv:  version 0.7.0 (tagged release) loading
> ivtv:  Linux version: 2.6.17-5mdv SMP mod_unload 686 gcc-4.1
> ivtv:  In case of problems please include the debug info between
> ivtv:  the START INIT IVTV and END INIT IVTV lines, along with
> ivtv:  any module options, when mailing the ivtv-users mailinglist.
> ivtv0: Autodetected Hauppauge WinTV PVR-350 card (cx23415 based)
> ivtv0: Unreasonably low latency timer, setting to 64 (was 32)
> tuner 0-0061: chip found @ 0xc2 (ivtv i2c driver #0)
> tda9887 0-0043: chip found @ 0x86 (ivtv i2c driver #0)
> saa7115 0-0021: saa7115 found @ 0x42 (ivtv i2c driver #0)
> saa7127 0-0044: saa7129 found @ 0x88 (ivtv i2c driver #0)
> msp3400 0-0040: MSP4448G-A2 found @ 0x80 (ivtv i2c driver #0)
> ivtv0: loaded v4l-cx2341x-enc.fw firmware (262144 bytes)
> ivtv0: loaded v4l-cx2341x-dec.fw firmware (262144 bytes)
> ivtv0: Encoder revision: 0x02050032
> ivtv0: Decoder revision: 0x02020023
> ivtv0: Allocate DMA encoder MPEG stream: 128 x 32768 buffers (4096KB total)
> ivtv0: Allocate DMA encoder YUV stream: 194 x 10800 buffers (2048KB total)
> ivtv0: Allocate DMA encoder VBI stream: 120 x 17472 buffers (2048KB total)
> ivtv0: Allocate DMA encoder PCM audio stream: 455 x 4608 buffers (2048KB
> total)
> ivtv0: Create encoder radio stream
> ivtv0: Allocate DMA decoder MPEG stream: 16 x 65536 buffers (1024KB total)
> ivtv0: Allocate DMA decoder VBI stream: 512 x 2048 buffers (1024KB total)
> ivtv0: Create decoder VOUT stream
> ivtv0: Allocate DMA decoder YUV stream: 24 x 43200 buffers (1024KB total)
> ivtv0: loaded v4l-cx2341x-init.mpg firmware (155648 bytes)
> ivtv0: Initialized Hauppauge WinTV PVR-350, card #0
> ivtv:  ====================  END INIT IVTV  ====================