[mythtv-users] HDHR3 recording fails, "wrong PMT"?

[Michael T. Dean]

On 12/03/2014 12:57 PM, Eric Sharkey wrote:
> On Wed, Dec 3, 2014 at 10:36 AM, Michael T. Dean wrote:
>> On 12/03/2014 10:30 AM, Michael T. Dean wrote:
>>> On 12/02/2014 01:48 PM, Eric Sharkey wrote:
>>>> On Mon, Dec 1, 2014 at 12:00 AM, Hika van den Hoven  wrote:
>>>>> If I google "Wrong PMT" I get among others this:
>>>>> https://code.mythtv.org/trac/ticket/9976 from three years ago.
>>>>> You need to delete all transports and all channels and perform a full
>>>>> rescan. The delete all transports is vital.....
>>>> This is the info in the dtv_multiplex table?  The channel scan doesn't
>>>> update this table automatically?
>>>
>>> Delete with mythtv-setup.
>>
>> and it will delete all the appropriate information from the cross-linked
>> tables.
>>
>> The scanner doesn't necessarily delete any broken stuff that's in place in
>> your database because it doesn't know whether the channel is still a good
>> channel but just not broadcasting, now.  So, if you want to clear out broken
>> stuff, do that manually, then rescan.
> But why was there broken stuff in the first place?

As I understand from your posts, the broken stuff was the old channel 
information from before Verizon moved some of the channels around.

>    All I did was
> re-do the channel scan (in mythtv-setup) and accepted all changes it
> recommended (insertion of new channels, deletion of old ones).

and it did that, but probably left old stuff in there for channels that 
couldn't be linked up to the now-existing channel information (i.e. it 
deleted those things it was able to positively identify as changed, but 
probably left stuff it didn't have enough information about).

IMHO, the best way to ensure a good scan is to do exactly as all the 
set-top-boxes and TVs do--delete your entire existing configuration and 
then scan from scratch (not on top of existing information).  While we 
could make that the default, it would likely be annoying to some (i.e. 
those in areas where some channels air only at certain times of time).

Mike