[mythtv-users] Unable to tune higher channels suddenly

Michael T. Dean mtdean at thirdcontact.com
Tue Jun 28 16:33:10 UTC 2005

Mario Limonciello wrote:

>Michael T. Dean wrote:
>>Mario Limonciello wrote:
>>>I Have a PVR250-MCE in my machine and have been using ivtv 0.3.3y
>>>for quite some time without a hickup.  Recently I updated to a current
>>>CVS and just today realized that I'm unable to tune higher channels (as
>>>in the 70s or so), and that I just get this error message spit out in my
>>>face in dmesg:
>>Sounds like you're specifying a tuner type in your module options. 
>I checked and wasn't specifying a tuner type, but I am autodetecting and
>letting it get the appropriate type for my card (47).
The behavior you describe is consistent with using a type 39 tuner 
definition with a type 47 tuner (inability to tune channels > 61).  Some 
IvyTV versions had a broken tuner module (with missing tuner definitions 
and improperly numbered tuners)--and, IIRC, the type 47 was mapped to 39 
with the definition for 39 changed to that for 47.  The current versions 
have fixed the discrepancies in the tuner module, so it's possible you 
were using a broken tuner module and didn't unload the tveeprom module 
(and, so, weren't using the updated tveeprom module for autodetection), 
so it kept detecting your tuner as the wrong one.

>Oddly enough, I just had an unrelated nvidia xid so I had to reboot. 
>After the reboot this started to work fine again. My only worry now is a
>recoccurrence.  I have had this box working fine since Jan or so this
>year and nothing of the such ever happened.
I wouldn't worry about it.  It's probably related to the driver update, 
so--if it does happen again--it should be relatively infrequent 
(and--assuming you update at "appropriate" times--you'll have some time 
to reboot).

Remember, also, that since the IvyTV developers cannot sign the NDA's 
for all the components in the PVR-x50's, they didn't get information on 
how to properly reset the cards.  Therefore, the only known working way 
to force a full reset is to power off the system (for about 30 seconds 
or more).  So, it's always worth powering off and waiting 30 seconds or 
so before powering on and trying again.


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