[pvrusb2] Weird behavior with my Happauge UB-PVR

[Mike Isely]

On Thu, 20 Mar 2008, Eric A. Bonney wrote:

> Ok well now things are making a little more sense. Let me give you more 
> feedback on my setup, as I really didn't think it was related until now. :)
> 
> I have an APC backup until that everything is plugged into. This until 
> will keep power going for about 30 minutes before it shuts off, I have 
> tested it to see how long it will last. So the power strip is plugged 
> into the APC and then things are plugged into it and also some items are 
> plugged directly into the APC unit.
> 
> So I am not really sure how short power lapses would cause this issue, 
> since the PVR is getting it's power from the APC unit anyways, or at 
> least I think it is. I will need to verify that here shortly.
> 
> If it isn't then I can understand why my PVR goes from /dev/video0 to 
> /dev/video1 once in a while if it loses power. I'll check on my 
> configuration shortly and post back...
> 
> Thanks a lot for the help guys.

Eric,

Ever since I resubscribed to LKML (silly me), I've had a hard time 
keeping my inbox properly pruned - and this message got buried.  I've 
only now just noticed it after excavating out all the other traffic.

In answer to your comments above, I agree if the PVR is already drawing 
power through your UPS then this would seem like an unlikely cause.  
All I can say about this is that if the device is indeed "momentarily" 
disappearing off of the USB cable - either through a power cycle or 
perhaps a loose cable - then the symptoms you are describing are what I 
would expect.  I've seen that behavior myself.  It seems unlikely that 
if you have spikes or other power surge issues that such junk could pass 
through the UPS, so I don't really have anything truly useful to add 
here.

Maybe the device has a real hardware problem which is causing it to 
reset?

  -Mike

-- 

Mike Isely
isely @ pobox (dot) com
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