[mythtv-users] DVB delivery systems

John Pilkington J.Pilk at tesco.net
Mon Sep 21 13:15:30 UTC 2015


On 21/09/15 12:29, Mike Perkins wrote:
> On 21/09/15 12:07, Stuart Auchterlonie wrote:
>> On 20/09/15 10:20, Devin Heitmueller wrote:
>>>> As I recall (it's been a while since I last configured my tuners) the
>>>> different standards (T vs. C) are exposed as different device nodes,
>>>> but
>>>> don't quote me on that.
>>>
>>> This only applies to devices where there are two separate demodulator
>>> chips in the device.  If the device has a single demod which supports
>>> both DVB-T and DVB-C, then it still gets represented as a single
>>> frontend device node and you have to tell it which mode to operate in.
>>>
>>> That said, I don't know whether MythTV ever got around to setting the
>>> delivery system.
>>>
>>
>> I'm pretty sure we are going to have to add explicit support for this.
>>
> Following up on my somewhat vague message above, I have now had the
> chance to access my backend and dmesg gives me:
>
> [   10.246892] Linux video capture interface: v2.00
> [   10.255654] dib0700: loaded with support for 21 different device-types
> [   10.256235] dvb-usb: found a 'Hauppauge Nova-T Stick' in warm state.
> [   10.256379] dvb-usb: will pass the complete MPEG2 transport stream to
> the software demuxer.
> [   10.257499] DVB: registering new adapter (Hauppauge Nova-T Stick)
> [   10.318566] em28xx: New device PCTV Systems PCTV 290e @ 480 Mbps
> (2013:024f, interface 0, class 0)
> [   10.318689] em28xx #0: chip ID is em28174
> [   10.464567] DVB: registering adapter 0 frontend 0 (DiBcom 7000PC)...
> [   10.625437] em28xx #0: Identified as PCTV nanoStick T2 290e (card=78)
> [   10.674933] DiB0070: successfully identified
> [   10.700072] Registered IR keymap rc-pinnacle-pctv-hd
> [   10.700327] input: em28xx IR (em28xx #0) as
> /devices/pci0000:00/0000:00:02.1/usb1/1-3/rc/rc0/input3
> [   10.700526] rc0: em28xx IR (em28xx #0) as
> /devices/pci0000:00/0000:00:02.1/usb1/1-3/rc/rc0
> [   10.700934] em28xx #0: v4l2 driver version 0.1.3
> [   10.705740] em28xx #0: V4L2 video device registered as video0
> [   10.705813] usbcore: registered new interface driver em28xx
> [   10.705818] em28xx driver loaded
> [   10.724077] Registered IR keymap rc-dib0700-rc5
> [   10.724445] input: IR-receiver inside an USB DVB receiver as
> /devices/pci0000:00/0000:00:02.1/usb1/1-5/rc/rc1/input4
> [   10.725229] rc1: IR-receiver inside an USB DVB receiver as
> /devices/pci0000:00/0000:00:02.1/usb1/1-5/rc/rc1
> [   10.725453] dvb-usb: schedule remote query interval to 50 msecs.
> [   10.725463] dvb-usb: Hauppauge Nova-T Stick successfully initialized
> and connected.
> [   10.725573] dib0700: rc submit urb failed
> [   10.725578]
> [   10.728662] dvb-usb: found a 'Hauppauge Nova-T Stick' in warm state.
> [   10.728847] dvb-usb: will pass the complete MPEG2 transport stream to
> the software demuxer.
> [   10.730125] DVB: registering new adapter (Hauppauge Nova-T Stick)
> [   10.940322] DVB: registering adapter 1 frontend 0 (DiBcom 7000PC)...
>
> ...
>
> [   12.267085] tda18271 6-0060: creating new instance
> [   12.271685] TDA18271HD/C2 detected @ 6-0060
> [   12.526085] tda18271 6-0060: attaching existing instance
> [   12.526096] DVB: registering new adapter (em28xx #0)
> [   12.526106] DVB: registering adapter 2 frontend 0 (Sony CXD2820R
> (DVB-T/T2))...
> [   12.526313] DVB: registering adapter 2 frontend 1 (Sony CXD2820R
> (DVB-C))...
> [   12.533764] em28xx #0: Successfully loaded em28xx-dvb
> [   12.533775] Em28xx: Initialized (Em28xx dvb Extension) extension
>
> It's not clear from the order of messages since it appears to be
> initializing three tuners at once but I'm guessing the (DVB-T/T2) and
> (DVB-C) messages refer to the pc-290e, proving it has separate endpoints
> for those modes.
>

I can't comment on relevance to the subject line, but my *buntu trusty 
laptop has a single 290e, and dmesg differs:

   22.269388] em28174 #0: V4L2 video device registered as video0
[   22.269395] em28174 #0: dvb set to isoc mode.
[   22.269808] usbcore: registered new interface driver em28xx
[   22.291627] tda18271 7-0060: creating new instance


   22.543767] DVB: registering new adapter (em28174 #0)
[   22.543780] usb 2-1: DVB: registering adapter 0 frontend 0 (Sony 
CXD2820R)...
[   22.544293] em28174 #0: Successfully loaded em28xx-dvb

John P





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