Freecom USB DVB-T woes

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I have been trying for some time to get freecom dvb-t usb sticks to work on my 
server, so I could set up a mythtv backend.  At least tonight I finally 
managed to get a mythtv frontend working with it, so I could see the actual 
picture.

I am near Crystal Palace in the UK, with a loft aerial, so I would have 
suspected a reasonably strong signal.  I am sharing the feed with a Panasonic 
PVR, and that is working perfectly.

I have built the dvb drivers from the latest (of two days ago) mercurial 
repository

Some issues
- I get regular failures in the log like the following.  This is with a single 
stick plugged in, watching BBC ONE apparently perfectly.  Reading the code, 
it implies I am getting USB protocol problems.  What could caused that?

Sep 13 23:57:06 roo kernel: dvb-usb: recv bulk message failed: -75
Sep 13 23:57:08 roo kernel: dvb-usb: recv bulk message failed: -71
Sep 13 23:57:09 roo kernel: dvb-usb: recv bulk message failed: -75
Sep 13 23:57:44 roo last message repeated 8 times
Sep 13 23:58:23 roo last message repeated 2 times
Sep 13 23:58:26 roo kernel: dvb-usb: bulk message failed: -71 (1/0)
Sep 13 23:59:00 roo kernel: dvb-usb: recv bulk message failed: -75
Sep 13 23:59:31 roo last message repeated 5 times

- I can't (despite doing so a week ago) get the stick to lock on in dvbscan on 
ITV channels (according to some UK information, the BBC is encoded with QAM16 
whilst ITV is encoded QAM64  Does that make a difference?


-- 
Alan Chandler
http://www.chandlerfamily.org.uk

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