I also have a DVICO Dual Digital 4 (PCI, not PCIe) and am running amd64
architecture. I'm running Mythbuntu 8.04 - I'm assuming this is based on
the desktop kernel. My card identifies itself as 0fe9:db78 in lsusb. I
set it up based on the instructions shown here:
http://ubuntuforums.org/showthread.php?t=616103 and it works. However, I
have a similar problem to that which Anders describes.

Frequently when I do a warm boot, the system exhibits similar behaviour:

- I get the "dvb-usb: bulk message failed: -110" at a frequency of about once a 
second
- I get similar keyboard issues with my usb keyboard (press k once and I get a 
dozen or so: "kkkkkkkkkkkkkkkkkk")

The only way I can get my system back to 'normal' again is to remove the
dvb_usb_cxusb module:

modprobe -r dvb_usb_cxusb

of course I have to stop the mythbackend first.Doing all this is very
difficult when every few keypresses get repeated a heap of times.
Especially when I have to login as root to do it. Though my system is
now usable, the tuner card won't work (not without that module I just
removed) so I have to reboot for me to use the system as intended.

I could live with the issue on warm reboot; I just have to shutdown,
wait a bit, then start up again. However, the system has recently
started doing it whenever I shut down the mythbackend (for configuration
for instance), and when I tested connecting with XBMC from another
machine it did it as well.

Based on the forum thread I followed to set the card up, this seems to
be a known issue among users of the card, but it's a royal pain in the
neck and it would be great if it got fixed some time. I'm happy to
provide additional information if that would be of assistance.

Cheers.

-- 
My DVB-card is flooding the consol with "recv bulk message failed"
https://bugs.launchpad.net/bugs/229879
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