[linux-dvb] TwinHan Vison Plus DST Problems

Richard Lewis richard at smetco.demon.co.uk
Sat Jun 4 22:18:17 CEST 2005


Hi,

I have a TwinHan Vision Plus DVB-T card... and I'm really getting to the
end of my tether with it!

Ok, deep breaths, explain the problem.

For the past few weeks (it seems longer), I have been trying to get
this card to work correctly (Slackware 10.1 on an Athlon 3200+). To
make matters worse, I have actually had it working (with what I think was
a 2.6.11.6 kernel). However, I had to recompile the kernel to add in some
other hardware, which I obviously did on returning from the pub one
Saturday evening, and I forgot to backup the config. It has never worked
since.

Yeah, I might have "modified" some other bits at this point too (can't
quite remember) :(

I have tried all sorts of 2.6 kernel (up to the latest 2.6.11.11), but I
now think that it must be something other than the kernel, possibly the
dbv-apps? However, I have tried everything with these too.
The linuxtv-dvb-apps-1.1.0 and the latest CVS snapshots compile fine, but
I always get the same error when I try to use one of the apps (explained
below).

Basically, the DVB modules seem to be loaded correctly:

modprobe bttv i2c_hw=1 card=0x71
modprobe dst
modprobe dvb-bt8xx

Which gives the following output in dmesg:

bttv: driver version 0.9.15 loaded
bttv: using 8 buffers with 2080k (520 pages) each for capture
bttv: Bt8xx card found (0).
PCI: Found IRQ 11 for device 0000:00:0a.0
PCI: Sharing IRQ 11 with 0000:00:0a.1
PCI: Sharing IRQ 11 with 0000:01:00.0
bttv0: Bt878 (rev 17) at 0000:00:0a.0, irq: 11, latency: 32, mmio:
0xd7800000
bttv0: detected: Twinhan VisionPlus DVB-T [card=113], PCI subsystem ID is
1822:0001
bttv0: using: Twinhan DST + clones [card=113,insmod option]
bttv0: gpio: en=00000000, out=00000000 in=00f500ff [init]
bttv0: using tuner=4
bttv0: add subdevice "dvb0"
bt878: AUDIO driver version 0.0.0 loaded
bt878: Bt878 AUDIO function found (0).
PCI: Found IRQ 11 for device 0000:00:0a.1
PCI: Sharing IRQ 11 with 0000:00:0a.0
PCI: Sharing IRQ 11 with 0000:01:00.0
bt878(0): Bt878 (rev 17) at 00:0a.1, irq: 11, latency: 32, memory:
0xd7000000
DVB: registering new adapter (bttv0).
dst_check_ci: recognize DTTDIG
DST type : terrestrial
DST type flags :
DVB: registering frontend 0 (DST DVB-T)...

The following device files are created:

crwxrwxrwx 1 root root 212, 4 2005-06-04 18:56 /dev/dvb0.demux0
crwxrwxrwx 1 root root 212, 5 2005-06-04 18:56 /dev/dvb0.dvr0
crwxrwxrwx 1 root root 212, 3 2005-06-04 18:57 /dev/dvb0.frontend0
crwxrwxrwx 1 root root 212, 7 2005-06-04 18:56 /dev/dvb0.net0

I create symlinks to these in /dev/dvb/adapter0:

lrwxrwxrwx 1 root video 16 2005-06-04 18:57 demux0 -> /dev/dvb0.demux0
lrwxrwxrwx 1 root video 16 2005-06-04 18:57 dvr0 -> /dev/dvb0.demux0
lrwxrwxrwx 1 root video 16 2005-06-04 18:57 frontend0 -> /dev/dvb0.demux0
lrwxrwxrwx 1 root video 16 2005-06-04 18:57 net0 -> /dev/dvb0.demux0

However, when I then try to use tzap to tune into a station (having
previously created a valid ~/.tzap/channels.conf (when it was working) I
get the following error:

./tzap -r "BBC ONE"
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
reading channels from file '/wolvie/.tzap/channels.conf'
ERROR: ioctl FE_GET_INFO failed (Invalid argument)

Going back a step, if I try to recreate the channels file, I also get the
same error:

bash-3.00$ ./dvbscan ./dvb-t/uk-CrystalPalace | tee channels.conf
scanning ./dvb-t/uk-CrystalPalace
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
main:2219: FATAL: FE_GET_INFO failed: 22 Invalid argument

Many thanks in advance to anyone who can help me with this, 'coz it is
quite literally driving me crazy.

Once I have solved this problem, I will be able to divert all my energies
to preventing myself from messing around with my comps in future when
(very) drunk :p

Wolvie




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