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

Graham Tavener graham.tavener at gmx.net
Sun Jan 28 22:20:53 CET 2007


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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