[pvrusb2] Weird behavior with my Happauge UB-PVR

[mailinglists at vanhlebarsoftware.com]

So everything has been working fairly well with my Myth setup for the  
last month or so. I haven't really been using it a  lot as I still am  
having issues getting a front end working so that it will display on  
my tv. (this is an issue with the computer, not Myth)

I have been seeing a situation that occurs more frequently than I  
would like and I was wondering if anyone else is seeing this and if  
there is a solution to it.

Normally my PVR is mounted at /dev/video0, however, frequently it will  
change to /dev/video1 without any reason. Normally I had seen this  
when I would shutdown the backend in order to run mythfilldatabase and  
then restart the backend. When this does occur, from the command like  
it looks like the backend starts, but upon review of the log file, you  
can see an error that the backend could not read from /dev/video0 or  
/dev/video1, depending on what I had it set to previously.

Last night I saw something really really strange happen. Right in the  
middle of a 1 hour show, somehow the the PVR when from being active on  
/dev/video0 to /dev/video1! Myth was recording just fine and then it  
just stopped.

I do have a script that runs each morning at 6:45am that shuts down  
the backend, runs mythfilldatabase and then starts the backend up  
again. Now that I know my issue, I have thought about creating a  
script that would run after the backend has been restarted and test to  
see if /dev/video0 or /dev/video1 should be used. Is the configuration  
file for the capture card just a text file that I could write to in  
order to do this in a script? Does anyone have any other suggestions  
to get this to work properly or is this just one of the issues you run  
into while using USB since there is no guarentee with USB that it will  
always be the same?

For what it's worth, I have the same issue with my 4 USB External HDs  
also. They don't always get the same device id on a reboot and I have  
to manually correct them so that my exported NFS stuff is correct.

Thanks,
-Eric