[mythtv-users] FireWire channel changer crapped out

DryHeat122 dryheat122 at gmail.com
Fri Jul 31 20:29:01 UTC 2020

On Thu, Jul 23, 2020 at 11:13 AM DryHeat122 <dryheat122 at gmail.com> wrote:

> I have had majoridiot's firewire channel changer working great for, like,
> years.  Yesterday, it quit working for no apparent reason.  lspci shows the
> device is there:  06:07.0 FireWire (IEEE 1394): Texas Instruments TSB43AB23
> IEEE-1394a-2000 Controller (PHY/Link)
> plugreport returns nothing
> ./firewire_tester -p -n 0 -r 5 returns "Failed to create new raw1394
> handle on port 0"
> mythchanger run with the -v option says "Acquiring firewire handle... OK.
> 0 port(s) found. 0 STB(s) found"
> Have checked the cable and rebooted both my myth box and the STB.  No
> help.

 I'm fortunate enough to have another Ubuntu box, so I ordered an
inexpensive PCI-E firewire card for it, which allowed me to test.  On the
test box plugreport showed the set-top-box.  The card came with a full-size
to mini-size firewire cable, which I connected to the other 1394 socket on
my original machine, and voila, plugreport on that machine showed the
set-top-box.  So it seems that either the mini-size socket on my original
machine went bad, or the mini-to-mini cable went bad.  I have no idea how
that can happen to things sitting there undisturbed, but there you have
it.  So this is SOLVED.
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