[mythtv-users] Help understanding udev rules

[Joe Henley]

> The HDPVRs are mapped to the correct /dev/video's but I'm not sure 
> that they will stay that way.

 From your info, it appears the sym-links are getting set up properly.  
You might double check that via Mike Perkin's suggestion.  As to your 
concern about them remaining properly set up, the easiest way to confirm 
it is to unplug them both, swap the USB connectors (from where they were 
to somewhere else).  They should reconnect themselves, once again in the 
correct order.

[Just a short side note....  Most people say the HD-PVR requires its own 
EHCI controller; ie., two devices requiring EHCI cannot share a hardware 
EHCI controller.  From my experience that means looking at the output of 
lsusb, the two HD-PVRs are not on the same bus (number).]

If the HD-PVRs do pass the "remain in the right set up" test above, then 
the remaining issue is the response from Myth about the "stating 
something like the device can not be probed."  Since you're not using 
Fedora w/systemd, you probably don't need the "SUBSYSTEM=="video4linux", 
ATTR{name}=="Hauppauge HD PVR", TAG+="systemd"" thingy I suggested.  But 
you probably do need to resolve a permission problem.  I run Myth BE as 
root, thus I need my /dev/HD-PVR symlink to be owned by root.  Your 
latest note indicates your symlinks are owned by root (" The results of 
the rules is a symlink from /dev/v4l/hdpvr1 and /dev/v4l/hdpvr2 with 
lrwxrwxrwx 1 root root"), so I'm guessing you run Myth BE as something 
other than root ("jt [at] myt" perhaps?).  If so, you could try the 
suggestion in my first note, but modify it to:
..., SYMLINK+="<yada yada>", MODE="0777",OWNER="jt [at] myt",GROUP="jt 
[at] myt" on the end of (your) rule entries.

As always, good luck and let us know how you do with this.

Joe