[mythtv-users] Trouble with two HD-PVRs on one system

David Engel david at istwok.net
Sun Nov 1 16:23:17 UTC 2009

On Sat, Oct 31, 2009 at 02:12:24PM -0600, John P Poet wrote:
> I use two HD-PVRs on the same backend without any problems, but I do
> NOT use any of the IR stuff.  With udev setup to map video[01] to be
> consistent for each unit, everything works as expected.

That's what I thought.

> If it is not the IR stuff causing the problem, maybe it is a USB
> issue?  Have you tried using different USB ports?

I had time to do more testing this morning.  It does seem to be a USB
problem.  Great, yet another hardware problem!

I have 4 back panel USB ports.  I haven't tried all combinations yet,
but one or both HD-PVRs act up when both are connected to the back
panel.  If I move one HD-PVR to a front panel port, things seem to be
stable, even with IR enabled.

Do you know if two HD-PVRs would play nice with an unpowered USB hub?
I'm finally happy with the cable management between my A/V stand and
Myth backend and having to run a separate cable around to the front
messes that up.  If it would work, I could mount a small hub on the
back of the stand and run one USB cable to the back panel.

David Engel
david at istwok.net

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