[mythtv-users] Firewire channel change
Joe Henley
joehenley at kc.rr.com
Sun Nov 4 19:39:00 UTC 2012
> Thanks for that..I did read it before,but so far no joy...
Greg,
I use firewire to change channels on the set top box which is then
connected to a HD-PVR. When I set up my system, I make fairly detail
notes on what I did. ...helps to offset the short memory of an old
fart. The stuff below is how I set up my firewire, perhaps you'll get
some ideas for yours from it.
-1- Modify mythtv-setup (on the backend) to use "/usr/sbin/sa_control -w
12000 " in the "external channel changer" field in the input connections
set up screen (of mythtv-setup). Note the blank at the end of the line.
-2- Add: "ExecStartPre=/usr/bin/plugctl -p 0 -n 1 "oPCR[0].n_p2p_connections=1" to /lib/systemd/system/mythbackend.service
This is for Ferdora 16; use rc.sysinit or whatever for your system
-3- The firewire driver creates the device nodes: /dev/fw0 and /dev/fw1
"sa_control" (and most of the utilities) need _*root*_ access to the firewire controller rom
But Myth FE runs as user "mythtv", so sa_control doesn't work within Myth FE
I tried: Add the video group and the [root, minimyth, mythtv, video] users together
Add a /etc/udev/rules.d/80-mythtv-rules to set the owner, group and mode to: root, root, 0666. This will over-ride some stuff in /lib/udev/rules
None worked
What worked: Modify: "/etc/udev/rules.d/80-mythtv.rules" as shown below (note the "/etc")
---------------------------- snip -----------------------------------------------------------------------------------------
# Set up the firewire devices with a more helpful mode
# (Ripped off from /lib/udev/rules.d/50-udev-default.rules) <== note the "lib"
# ==========================================================
KERNEL=="fw[0-9]", ATTR{vendor}=="0xd00d1e", ATTR{model}=="0x000001", \
SYMLINK+="FWire_0", MODE="0666", OWNER="mythtv", GROUP="mythtv"
KERNEL=="fw[0-9]", ATTR{units}=="*0x00a02d:0x010001*", SYMLINK+="FWire_1", \
MODE="0666", OWNER="mythtv", GROUP="mythtv"
I'm not sure why FWire_0 and FWire-1 ended up with owner/group = root/root, but it works.
---------------------- snip
----------------------------------------------------------------------------------------
Good luck! Let uss know how it works.
Joe Henley
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