[mythtv-users] Can't tune comcast 709 (KQED) over firewire (DCH3200) but can tune others (not 5c?)

[Brad Fuller]

On Sun, Apr 25, 2010 at 13:23, Marc MERLIN <marc_mtv at merlins.org> wrote:
> On Sun, Apr 25, 2010 at 09:46:00AM -0700, Brad Fuller wrote:
>> On Sun, Apr 25, 2010 at 09:16, Marc MERLIN <marc_mtv at merlins.org> wrote:
>> > [I am on the list, but Cc of replies is appreciated]
>> >
>> > Recently, my mythtv started failing to record some shows from KQED over
>> > firewire (comcast 709 in the San Francisco Bay Area).
>> >
>> > First, I made sure 709 works fine through the cable box alone.
>> >
>> > Then I went in the diagnostic screen
>> > http://en.wikibooks.org/wiki/How_to_use_a_Motorola_DVR/Configuration#How_To_Check_If_5C_DTCP_is_Enabled
>> > (using remote, power button, ok/select, menu D11 while I'm on channel 709)
>> >
>> > Screen #3 shows:
>> > 1394
>> > Data Xmission Active
>> > 5c implementation: No
>> > Copy control: Copy Free
>> >
>> > So this implies that 5c is not active.
>> >
>> > Yet, mythtv won't tune it. I used to have 0.21, just upgraded to 0.23 and no
>> > progress.
>> > Other channels (I use over 10) continue to work fine over firewire.
>> >
>> > Any idea what else could be going on here?
>>
>> did you try to change the channel using the script outside of Myth?
>
> Mythtv changes the channel fine, I can see it displayed on the DCH-3200.
> After myth fails to tune the channel if I switch my TV to displaying the
> video output of the DCH-3200, my channel is tuned and playing.
>
> It just won't go through firewire for some reason, which usually is a 5c
> problem but the box says 5c is disabled, so I'm at a loss...

Ah... I had a similar problem. It wasn't consistent -  I can't
remember if the other outputs were changing though. Did you check
that?

That is, connect a TV directly to another video out of the STB
(composite or whatever output, just as long as it's not 1394) and
switch the channel with the script. That is: compare the output of the
composite with the 1394. Testing if it REALLY is changing the tuner.

-- 
Brad Fuller
+1 (408) 335-0112