[linux-dvb] Problem getting channel list with nova-t-500

matt.nottingham at zen.co.uk matt.nottingham at zen.co.uk
Sun Jan 28 22:45:23 CET 2007


Graham,

I think I have! As I mentioned originally, I do have a line like this
in my modules.conf, but there is nothing mentioned about this flag
being set in dmesg on boot up.

Thanks,

Matt

Graham Tavener writes:
 > Matt, have you enabled the amplifier?
 > Add the following line to the end of /etc/modprobe.conf
 > 
 > options dvb-usb-dib0700 force_lna_activation=1
 > 
 > It forces the Low Noise Amplifier on and this made the difference between 
 > <40% to 70% signal for me.
 > 
 > I'm using Fedora Core 6 2.6.20-rc5 on a AM2 dual core 3800 and it has been 
 > pretty reliable, but I've had a couple of complete hangs which seem to be 
 > dvb driver related.
 > 
 > Graham
 > 
 > ----- Original Message ----- 
 > From: <matt.nottingham at zen.co.uk>
 > To: <linux-dvb at linuxtv.org>
 > Sent: Sunday, January 28, 2007 6:10 PM
 > Subject: [linux-dvb] Problem getting channel list with nova-t-500
 > 
 > 
 > >
 > >
 > >
 > > Hi,
 > >
 > > I have a Debian (unstable) AMD64 (with 4gig RAM) and a nova-t-500
 > > card. I'm currently running linux 2.6.20-rc6. If I try 'scan' I get
 > > the following:
 > >
 > >  # scan -vvv /usr/share/doc/dvb-utils/examples/scan/dvb-t/uk-SandyHeath
 > >  scanning /usr/share/doc/dvb-utils/examples/scan/dvb-t/uk-SandyHeath
 > >  using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
 > >  initial transponder 641833334 0 2 9 3 0 0 0
 > >  >>> tune to: 
 > > 641833334:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_64:TRANSMISSION_MODE_2K:GUARD_INTERVAL_1_32:HIERARCHY_NONE
 > >  >>> tuning status == 0x1a
 > >  WARNING: filter timeout pid 0x0011
 > >  WARNING: filter timeout pid 0x0000
 > >  WARNING: filter timeout pid 0x0010
 > >  dumping lists (0 services)
 > >  Done.
 > >
 > > If I use kaffeine (using Sandyheath as the default location) I see:
 > >
 > >  Using DVB device 0:0 "DiBcom 3000MC/P"
 > >  tuning DVB-T to 641833000 Hz
 > >  inv:2 bw:0 fecH:2 fecL:9 mod:3 tm:0 gi:0 hier:0
 > >  . LOCKED.
 > >  Transponders: 1/1
 > >
 > >  Invalid section length or timeout: pid=17
 > >
 > >
 > >  Invalid section length or timeout: pid=0
 > >
 > >  Frontend closed
 > >
 > > So it certainly seems to find the signal (as it locks) but then gets a
 > > bit grumpy!
 > >
 > > I've tried 2.6.19.2, setting mem=3G (having 4gig of ram has upset
 > > certain cards (ethernet, USB,....) in the past), using the latest
 > > drivers from the SCM system, having
 > > 'options  dvb-usb-dib0700 force_lna_activation=1'
 > > in my /etc/modules.conf   - but all give the above results.
 > >
 > > I don't have a TV with me nor do I have MS-Windows to try the card out
 > > there - so is it just a signal (ie. lack there-of!) problem? Hopefully
 > > next weekend I'll have my USRP (http://gnuradio.org/trac/wiki) with me
 > > and be able to see what strength signals I do have.
 > >
 > > Any thoughts or hints or suggestions would be welcome!
 > >
 > > Thanks
 > >
 > > Matt Nottingham
 > >
 > > Just for completeness, if I do 'dmesg | grep -i dvb' I get:
 > >
 > >
 > > dvb_usb_dib0700 2-1:1.0: usb_probe_interface
 > > dvb_usb_dib0700 2-1:1.0: usb_probe_interface - got id
 > > dvb-usb: found a 'Hauppauge Nova-T 500 Dual DVB-T' in cold state, will try 
 > > to load a firmware
 > > dvb-usb: downloading firmware from file 'dvb-usb-dib0700-01.fw'
 > > dvb-usb: found a 'Hauppauge Nova-T 500 Dual DVB-T' in warm state.
 > > **WARNING** I2C adapter driver [Hauppauge Nova-T 500 Dual DVB-T] forgot to 
 > > specify physical device; fix it!
 > > dvb-usb: will pass the complete MPEG2 transport stream to the software 
 > > demuxer.
 > > DVB: registering new adapter (Hauppauge Nova-T 500 Dual DVB-T).
 > > DVB: registering frontend 0 (DiBcom 3000MC/P)...
 > > dvb-usb: will pass the complete MPEG2 transport stream to the software 
 > > demuxer.
 > > DVB: registering new adapter (Hauppauge Nova-T 500 Dual DVB-T).
 > > DVB: registering frontend 1 (DiBcom 3000MC/P)...
 > > dvb-usb: Hauppauge Nova-T 500 Dual DVB-T successfully initialized and 
 > > connected.
 > > usbcore: registered new interface driver dvb_usb_dib0700
 > >
 > > _______________________________________________
 > > linux-dvb mailing list
 > > linux-dvb at linuxtv.org
 > > http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
 > >
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