Hi,
im running a clean install of Ubuntu 12.04, with Puredata 0.43.0-4 from 
Ubuntu repos, with a compiled Gem-0.93.3.
Configure output of Gem shows:
capture-support
     use PLUGINS		 : yes
     use v4l              : yes (libv4l)
     use v4l2             : yes (libv4l)
     use ieee1394         : yes ( libdc1394 )
When i connect the dv device i see in dmesg:
[14522.765477] firewire_core: phy config: card 0, new root=ffc1, 
gap_count=5
[14522.765695] firewire_core: phy config: card 0, new root=ffc1, 
gap_count=5
[14523.269924] firewire_core: created device fw1: GUID 
002011010f002781, S400
Im able to dvgrab from the device without problems.
When i create pix_video i see in console:
[pix_video]: backend #0='v4l2'	: v4l2 analog
[pix_video]: backend #1='v4l'	: v4l analog
[pix_video]: backend #2='dc1394'	: dc1394 iidc
When i send [driver dv( to pix_video:
videoctl: driver dv
[pix_video]: could not find a backend for driver 'dv'
When i send [device /dev/fw1( to pix_video:
videoctl: device /dev/fw1
Cannot open '/dev/fw1': 25, Inappropriate ioctl for device
videoDC1394: no cameras found
I try to set [driver 2(:
videoDC1394: no cameras found
I send now [device /dev/fw1( to pix_video:
videoctl: device /dev/fw1
videoDC1394: no cameras found
and so on ..
The device is there (i chmoded it to 777 to make sure)
# ls -la /dev|grep fw
crwxrwxrwx   1 root root    251,   0 Aug 10 19:41 fw0
crwxrwxrwx+  1 root video   251,   1 Aug 10 23:43 fw1
this is my kernel:
3.2.0-65-lowlatency #68-Ubuntu SMP PREEMPT
Does anyone have any idea what could be wrong ? I guess it must be sth 
stupid and trivial..
thx & regards,
gnd/