<div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><pre style>On Sat, Feb 25, 2012 at 12:16 PM, John Pilkington <<a href="http://www.mythtv.org/mailman/listinfo/mythtv-users" target="_blank">J.Pilk at tesco.net</a>> wrote:
><i> On 25/02/12 18:39, Dave M wrote:
</i>>><i> Hi all,
</i>>><i>
</i>>><i> I have a Motorola DCT6412 III box connected to Shaw Cable.
</i>>><i>
</i>>><i> Firewire chipset is: FireWire (IEEE 1394): Agere Systems FW322/323 (rev 61)
</i>>><i>
</i>>><i> In MythTV, I can tune and capture all of the HD channels that I
</i>>><i> subscribe to.
</i>>><i>
</i>>><i> However when I try to tune any SD channels, the tuning popup just says
</i>>><i> "100% Signal (TL__) Partial Lock." and stays there forever.
</i>>><i>
</i>>><i> The cable box display shows the correct channel, so at least the
</i>>><i> channel-change part seems to be working properly.
</i>>><i>
</i>>><i> I have verified that 5C copy protection is not in effect-- all the
</i>>><i> channels are marked "Copy Free" in the cable box's info screen.
</i>>><i>
</i>>><i> I've tried Point-to-Point and Broadcast mode with just about every
</i>>><i> different option for "Cable Box type" and I've had the same result with
</i>>><i> every combination so far.
</i>>><i>
</i>>><i> I previously had a different cable box on a different provider, on the
</i>>><i> same PC and FW card, and it worked flawlessly, so I at least know
</i>>><i> that my FW setup works.
</i>>><i>
</i>>><i> Does anyone have any more ideas of what to try here? Please let me
</i>>><i> know if there are any relevant logs I should post. The frontend log
</i>>><i> just showed a lot of "Waited 100ms for video buffers" messages.
</i>>><i>
</i>>><i> Thanks in advance for your help.
</i>
This is a problem which has been experienced other Shaw cable users as
well. In addition to the 5C flag, you also need to check the CCI
flag, which I am not very familiar with. See
<a href="http://digitalhome.ca/forum/showthread.php?p=1285931" target="_blank">http://digitalhome.ca/forum/showthread.php?p=1285931</a> for more
information, but unfortunately no resolutions. To summarize that
thread, it appears to be a issue on Shaw cable's end, and not your
set-up. Efforts to get the company to resolve the issue have not been
successful, essentially because firewire is not officially supported.</pre>
</blockquote></div>You definitely hit the nail on the head. I didn't realize there was another level of DRM there. All of the channels that worked had CCI=0x00 (Copy freely), all the ones I couldn't tune had CCI=0x02 (Copy Once). Copy Once only applies to DTCP-compliant devices, which apparently don't exist for PCs.<div>
<br></div><div>It's beyond me why they would bother to set this flag on the SD channels, but not on any of the HD versions of the exact same channel. I've sent a tweet to @Shawhelp but I don't expect much help, if any. As you know, FireWire outputs don't exist in Shaw's world.</div>