[mythtv-users] ivtv0 warning: encoder VBI: Couldn't find start of buffer within the first 256 bytes

David Kramer david at thekramers.net
Thu Aug 9 11:38:59 UTC 2007

I get this message hundreds of times all throughout /var/log/messages:

  kernel: ivtv0 warning: encoder VBI: Couldn't find start of buffer 
within the first 256 bytes

I also get:

kernel: ivtv0: All encoder VBI stream buffers are full. Dropping data.
kernel: ivtv0: Cause: the application is not reading fast enough.

Is my CPU simply too slow?
Is the hard drive too slow?
Is there's some buffer that's too small that I can tweak?

I have a PVR-350 and an Athlon XP 2400+, but I'm probably gonna get a 
faster chip in a month or so, because this box is my "everything" server 
(firewall, web, mail, mailman, Subversion,...).


ivtv: no version for "struct_module" found: kernel tainted.
ivtv:  ==================== START INIT IVTV ====================
ivtv:  version 0.10.3 (tagged release) loading
ivtv:  Linux version: 2.6.20-1.2962.fc6 SMP mod_unload 686 4KSTACKS
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 card (cx23415 based)
ivtv0: Unreasonably low latency timer, setting to 64 (was 32)
ivtv0: loaded v4l-cx2341x-enc.fw firmware (376836 bytes)
ivtv0: loaded v4l-cx2341x-dec.fw firmware (262144 bytes)
ivtv0: Encoder revision: 0x02060039
ivtv0: Decoder revision: 0x02020023
ivtv0: Autodetected Hauppauge WinTV PVR-350
tuner 1-0043: chip found @ 0x86 (ivtv i2c driver #0)
tuner 1-0061: chip found @ 0xc2 (ivtv i2c driver #0)
saa7115 1-0021: saa7115 found (1f7115d0e100000) @ 0x42 (ivtv i2c driver #0)
ivtv0: Failed to load module saa7127
msp3400 1-0040: MSP4448G-A2 found @ 0x80 (ivtv i2c driver #0)
ivtv0: Registered device video0 for encoder MPEG (4 MB)
ivtv0: Registered device video32 for encoder YUV (2 MB)
ivtv0: Registered device vbi0 for encoder VBI (1 MB)
ivtv0: Registered device video24 for encoder PCM audio (1 MB)
ivtv0: Registered device radio0 for encoder radio
ivtv0: Registered device video16 for decoder MPEG (1 MB)
ivtv0: Registered device vbi8 for decoder VBI (1 MB)
ivtv0: Registered device vbi16 for decoder VOUT
ivtv0: Registered device video48 for decoder YUV (1 MB)
ivtv0: loaded v4l-cx2341x-init.mpg firmware (155648 bytes)
ivtv0: Initialized Hauppauge WinTV PVR-350, card #0
ivtv:  ====================  END INIT IVTV  ====================

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