[mythtv-users] firewire channel change: could not set port

[Peter Bennett (cats22)]

On 01/25/2015 01:56 PM, Dave Badia wrote:
> Hi list -
> I am trying to migrate from satellite to cable.  My first step is to
> get firewire channel change working with the scientific atlanta 4240
> cable box.  I've installed a pci-e firewire card and am running the
> sa4250_ch.c script from the wiki
> (http://www.mythtv.org/wiki/Sa4250_ch_guid).
>
> My problem is that when I run the script I always get "could not set
> port":
> ./sa4250_ch -v -k 123
> ERROR-- could not set port: Invalid argument
>
> Here is the relevant output from plugreport
> sudo plugreport
> Host Adapter 0
> ==============
>
> Node 0 GUID 0x0011066600000068
> ------------------------------
> libiec61883 error: error reading oMPR
> libiec61883 error: error reading iMPR
>
> Node 1 GUID 0x0022cec9c0540000
> ------------------------------
> oMPR n_plugs=1, data_rate=2, bcast_channel=63
> oPCR[0] online=1, bcast_connection=0, n_p2p_connections=0
>         channel=0, data_rate=0, overhead_id=0, payload=146
> iMPR n_plugs=0, data_rate=2
>
>
> Here is the relevant output from lspci:
>
> 04:00.0 FireWire (IEEE 1394): VIA Technologies, Inc. VT6315 Series
> Firewire Controller (rev 01) (prog-if 10 [OHCI])
>         Subsystem: VIA Technologies, Inc. VT6315 Series Firewire
> Controller
>         Flags: bus master, fast devsel, latency 0, IRQ 16
>         Memory at fdcff000 (64-bit, non-prefetchable) [size=2K]
>         I/O ports at 9c00 [size=256]
>         Capabilities: [50] Power Management version 3
>         Capabilities: [80] MSI: Enable- Count=1/1 Maskable+ 64bit+
>         Capabilities: [98] Express Endpoint, MSI 00
>         Capabilities: [100] Advanced Error Reporting
>         Capabilities: [130] Device Serial Number 00-11-06-ff-ff-00-00-68
>         Kernel driver in use: firewire_ohci
>
> Any help is greatly appreciated!
>
> Thanks
> Dave
>
>

When I first started using Firewire I never got the channel change to
work. After struggling with it for some time and trying every channel
change program available, I finally switched over to an IR blaster
(IguanaIR) for channel changing while recording off the firewire port. I
have Comcast, your experience may vary.

Peter