[mythtv-users] Hauppauge DVBT-500 Unable to Tune in MythTV

[John Pilkington]

On 16/08/13 10:47, Roger Siddons wrote:
> On Fri, 16 Aug 2013 09:22:04 +0100, Ian Barton <lists at wilkesley.net> wrote:
>
>>>
>>> I delete all cards and just added back the DVBT-500. I didn't change
>>> anything, as this has worked in the past without me tweaking stuff.
>>>
>>> Now in the log I get:
>>>
>>> 2013-08-15 15:16:15.125709 I [403/605] TVRecEvent tv_rec.cpp:3562
>>> (TuningCheckForHWChange) - TVRec(5): HW Tuner: 5->5
>>> 2013-08-15 15:16:15.165802 W [403/605] TVRecEvent dvbchannel.cpp:414
>>> (CheckOptions) - DVBChan(5:/dev/dvb/adapter2/fronte
>>> nd0): 'Auto' bandwidth parameter unsupported by this driver.
>>>
>>> However, I can't see any place to alter the bandwidth param.
>>>
>>
>> Some slight progress. When I get the "Time out tuning...", if I choose
>> another channel the tuner can tune OK. However, it won't tune some
>> channels which I suspect are all on a different multiplex. The other
>> Avermedia tuner can tune to these without any problems.
>>
>> As far as I know no changes have been made to channels since the last
>> big shakeup a few months ago. I'll try re-scanning for channels and
>> see if that helps. I may be gone some time....
>>
>
> The 'Auto' bandwidth parameter is part of the mux/transport definition.
> Use Myth-Setup/Channel Editor/Edit Transports to modify it. My
> bandwidths are all set to 8 MHz. Sounds like your problem muxe(s) may
> have been re-scanned with a different tuner (that does support 'Auto'
> bandwidth detection)
>
> Also, you said you tried the "various time out options". The "tuning
> time-out" & "signal time-out" settings won't have much effect. The
> important one is the "tuning delay" in the Recording Options sub-screen.
> 250 ms works for me.
>

Not strictly relevant here, but I notice that after a recent rescan 
Film4 and More4 are now usually 720*576, and with somewhat higher 
bitrates than before.  Previously they were 544*576.  Both are now in 
the ITV mux.