Hello all,

I recently upgraded my MythTV box to Mythdora 5.0 hoping to resolve some
problems I had in using MythTV. Many problems have disappeared, however...
at least one remained.

When I select a TV-channel normally everything works fine, but sometimes
the capture appears in black and white. When I change the channel and then
return to the "black-white" channel, very often this channel reappears in
full colour!

The same can happen when the mythtv box records a television program. The
captured video often is in black-white while at other times the capture
for the same channel appears in colour.

A few remarks:
- Without being sure I suspect this problem appears only at a few
TV-channels, i.e. this problem is not present for each TV-channel I have.
- I had this problem with my previous version of mythtv (0.20). I do not
know what version of ivtv was used.
- In the log file /var/log/mythtv/mythbackend.log I can not see any
difference in logging information whether the capturing is in colour or
B/W.

Info:
- MythDora 5.0
- MythTV 0.21-191.fc8
- IVTV 1.0.3-136.fc8
- ivtv-firmware 20070217-17
- dmesg | grep -i ivtv:
ivtv:  Start initialization, version 1.2.0
ivtv0: Initializing card #0
ivtv0: Autodetected Hauppauge card (cx23416 based)
ivtv0: Unreasonably low latency timer, setting to 64 (was 32)
ivtv0: Autodetected WinTV PVR 500 (unit #1)
cx25840 1-0044: cx25843-24 found @ 0x88 (ivtv i2c driver #0)
tuner 1-0060: chip found @ 0xc0 (ivtv i2c driver #0)
tuner 1-0043: chip found @ 0x86 (ivtv i2c driver #0)
tuner 1-0061: chip found @ 0xc2 (ivtv i2c driver #0)
wm8775 1-001b: chip found @ 0x36 (ivtv i2c driver #0)
ivtv0: Registered device video0 for encoder MPG (4096 kB)
ivtv0: Registered device video32 for encoder YUV (2048 kB)
ivtv0: Registered device vbi0 for encoder VBI (1024 kB)
ivtv0: Registered device video24 for encoder PCM (320 kB)
ivtv0: Registered device radio0 for encoder radio
ivtv0: Initialized card #0: WinTV PVR 500 (unit #1)
ivtv1: Initializing card #1
ivtv1: Autodetected Hauppauge card (cx23416 based)
ivtv1: Unreasonably low latency timer, setting to 64 (was 32)
ivtv1: Correcting tveeprom data: no radio present on second unit
ivtv1: Autodetected WinTV PVR 500 (unit #2)
cx25840 2-0044: cx25843-24 found @ 0x88 (ivtv i2c driver #1)
tuner 2-0043: chip found @ 0x86 (ivtv i2c driver #1)
tuner 2-0061: chip found @ 0xc2 (ivtv i2c driver #1)
wm8775 2-001b: chip found @ 0x36 (ivtv i2c driver #1)
ivtv1: Registered device video1 for encoder MPG (4096 kB)
ivtv1: Registered device video33 for encoder YUV (2048 kB)
ivtv1: Registered device vbi1 for encoder VBI (1024 kB)
ivtv1: Registered device video25 for encoder PCM (320 kB)
ivtv1: Initialized card #1: WinTV PVR 500 (unit #2)
ivtv:  End initialization
ivtv0: Loaded v4l-cx2341x-enc.fw firmware (376836 bytes)
ivtv0: Encoder revision: 0x02060039
ivtv1: Loaded v4l-cx2341x-enc.fw firmware (376836 bytes)
ivtv1: Encoder revision: 0x02060039

Does anyone have a clue where to look for further information?

Kind regards,

Luc


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