[linux-dvb] DEC 2000-t troubles with 2.4 kernel

[Des Herriott <des.herriott@oracle.com>]

Hi,

I'm trying to get a DEC 2000-t working at the moment, and I think I'm 
fairly close, but not quite...

I've built the CVS dvb-kernel drivers for 2.4.23 (using the build-2.4/ 
directory), and ensured that ttusb_dec.c contains the dec2000t.bin firmware.

The device seems to be detected OK:

Dec 12 08:50:45 leia DVB: registering new adapter (DEC2000-t).
Dec 12 08:50:45 leia DVB: registering frontend 0:0 
(TechnoTrend/Hauppauge DEC2000-t Frontend)...

I'm confident that the firmware is being uploaded - when first plugged 
in, the adapter resets once, and then not again until it's power-cycled.

I'm using the scan programs from the CVS CVB module - is that the right 
version to use with the dvb-kernel drivers?

Also, can someone confirm just which modules need to be loaded?  At the 
moment, I'm just doing "sh insmod.sh load", and also manually loading 
ttusb_dec.o.  I'm sure that's overkill.

Anyway, when I attempt to scan, I get:

scanning dvb-t/uk-Hannington
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
Frontend can not do INVERSION_AUTO, trying INVERSION_OFF instead
initial transponder 706000000 0 3 0 1 0 0 0
>>> tune to: 
706000000:INVERSION_OFF:BANDWIDTH_8_MHZ:FEC_3_4:FEC_NONE:QAM_16:TRANSMISSION_MODE_2K:GUARD_INTERVAL_1_32:HIERARCHY_NONE
>>> tuning status == 0x1f
start_filter:1083: ERROR: ioctl DMX_SET_FILTER failed: 22 Invalid argument
start_filter:1083: ERROR: ioctl DMX_SET_FILTER failed: 22 Invalid argument
WARNING: filter timeout pid 0x0000
start_filter:1083: ERROR: ioctl DMX_SET_FILTER failed: 22 Invalid argument
WARNING: filter timeout pid 0x0011
WARNING: filter timeout pid 0x0010
dumping lists (0 services)
Done.

The "Invalid argument" error to DMX_SET_FILTER doesn't always occur - it 
seems to be intermittent - but I always get the filter timeouts and 0 
services found.  I know my signal's good, the box works fine under 
Windows, using the Hannington transmitter.

Have I missed something basic here?  If needs be, I can load the driver 
with debug and post some verbose logs...

--
Des Herriott                         Senior Systems Support Consultant
Oracle Corporation UK Ltd. (EMEA)    Tel:   +44 118 924 6082
Suttons Park Avenue                  Email: Des.Herriott@oracle.com
Earley, Reading RG6 1AZ



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