[linux-dvb] DViCO FusionHDTV DVB-T Dual Digital problems

Kielogl kielogl at yahoo.com
Tue Sep 26 07:06:56 CEST 2006

Just added a new DViCO FusionHDTV DVB-T Dual Digital tuner card for MythTV on FC5 and have come across some problems. The card seems to be initializing ok, as per dmesg | grep -i dvb:

cx2388x dvb driver version 0.0.6 loaded
CORE cx88[0]: subsystem: 18ac:db50, board: DViCO FusionHDTV DVB-T Dual Digital [card=44,autodetected]
cx88[0]/2: cx2388x based dvb card
DVB: registering new adapter (cx88[0]).
DVB: registering frontend 0 (Zarlink ZL10353 DVB-T)...
dvb-usb: found a 'DViCO FusionHDTV DVB-T Dual USB' in cold state, will try to load a firmware
dvb-usb: downloading firmware from file 'dvb-usb-bluebird-01.fw'
usbcore: registered new driver dvb_usb_cxusb
dvb-usb: generic DVB-USB module successfully deinitialized and disconnected.
dvb-usb: found a 'DViCO FusionHDTV DVB-T Dual USB' in warm state.
dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer.
DVB: registering new adapter (DViCO FusionHDTV DVB-T Dual USB).
DVB: registering frontend 1 (Zarlink ZL10353 DVB-T)...
input: IR-receiver inside an USB DVB receiver as /class/input/input2
dvb-usb: schedule remote query interval to 150 msecs.
dvb-usb: DViCO FusionHDTV DVB-T Dual USB successfully initialized and connected.

I am using the current FC5 kernel, 2.6.17-1.2187_FC5, and last built v4l-dvb from the mercurial source at linuxtv.org earlier this week (24 Sept 2006).

Both receivers initially work fine in MythTV, except the PCI receiver is not able to receive the SBS channel here in Melbourne, Australia. SBS works fine on the USB receiver. (To get SBS and channel Nine to work at all, I had to add the +166667Hz offset to the channel frequency, as per http://www.linuxtv.org/pipermail/linux-dvb/2006-July/011623.html.)

It seemed like a signal strength problem with the SBS channel, as lock can be slow and frame updates are delayed/pixelated/corrupt. However, I tried the card/antenna in a WinXP machine and all channels are received perfectly. The Windows receiver app shows the signal strength is 100% for all channels:

ABC   - 100% (29.1dB)
Seven - 100% (30.1dB)
Nine  - 100% (30.6dB)
Ten   - 100% (29.0dB)
SBS   - 100% (25.3dB)

After working ok initially for anywhere up to a day or so (except for SBS on PCI), the second problem happens. The USB receiver suddenly stops working and syslog is flooded with "bulk message failed" messages:

dvb-usb: recv bulk message failed: -71
dvb-usb: bulk message failed: -32 (1/0)
last message repeated 14 times
dvb-usb: bulk message failed: -32 (1/0)
last message repeated 19 times
dvb-usb: bulk message failed: -32 (1/0)
last message repeated 20 times

If I just reboot, the /dev/dvb/adapter1/* devices are missing. The only way I can get it working again is by shutting down the system, and pulling the power before restarting, so the firmware for the USB receiver is reloaded.

Would much appreciate any advice on how to get some stability back with the new card's USB receiver and on the SBS channel reception for the PCI receiver.

Thanks in advance,

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