[mythtv-users] HD-PVR as IR receiver under Mythbuntu, advice needed

Johnny Walker johnnyjboss at gmail.com
Tue Nov 24 22:16:21 UTC 2009


On Tue, Nov 24, 2009 at 4:13 PM, Jarod Wilson <jarod at wilsonet.com> wrote:
> On Nov 24, 2009, at 4:58 PM, Jerry Rubinow wrote:
>
>> > There are reports of the unit essentially locking itself up during recording if the ir part is being polled by the lirc_zilog driver, yes. Not sure if that's an issue with the hdpvr driver or the lirc_zilog driver at this point. I don't actually use my hdpvr for much of anything at the moment, and haven't had time to dig into it.
>> >
>> > Hmmm.  Does use of the HD-PVR receiver necessitate use of lirc_zilog?
>>
>> Yes.
>>
>> > Is lirc_zilog always polling the IR?
>>
>> If loaded and bound to the hdpvr, yes.
>>
>> > Is there any way to prevent polling,
>>
>> Don't load lirc_zilog, or rewrite lirc_zilog to be interrupt-driven. (Not even sure if that's possible... It'd definitely be preferred if it was though).
>>
>> > and what implications does that have?
>>
>> Non-functional IR receiver. If you're not polling it, you're not going to see any incoming IR signals.
>>
>> Sounds like it's unknown whether this lockup affects all HD-PVR+lirc users or what the frequency is, or when you'll have time to look into it.
>
> Correct.
>
>> Fair enough.  It's not the answer I was hoping for, but better than no answer.  I still think I'll go ahead and get the Revo, and if I experience the same thing and it isn't too hard, I'll try to help debug it.
>
> Any and all help doing so would be much appreciated. However, at the moment, I'm not quite sure where to start, other than running both the hdpvr driver and lirc_zilog driver with full-blown module debugging options enabled.
>
>> When you say "non-functional IR receiver", do you mean the driver isn't functioning or the hardware/firmware?  Or unknown?
>
> The driver has to poll the IR chip to see if a new signal has arrived. If it doesn't poll the IR chip, you'll never know that a button was pressed, rendering the receiver non-functional.

I have the HD-PVR and I don't use the lirc_zilog - opting instead to
control my STB with Firewire.

The lirc_zilog is only needed if you want to use the IR receiver
portion of the HD-PVR.

Since my HD-PVR is on a dedicated backend unit I don't need IR to work
on that box.

> --
> Jarod Wilson
> jarod at wilsonet.com
>
>
>
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