I now have the following setup:
Ubuntu 12.04LTS fresh install with updates
Motherboard: Intel DG33TL
integrated FW adapter: 06:03.0 FireWire (IEEE 1394): LSI Corporation FW322/323 
(rev 70)
Camera: Sony TRV-900

So I've now other motherboard&adapter, other camera, newer Ubuntu and I
think I also have another cable.. (see #30).

When I connect the camera, dmesg doesn't show anything. On disconnection I get 
these lines:
[  443.106496] firewire_core: skipped bus generations, destroying all nodes
[  443.604029] firewire_core: rediscovered device fw0

Here's my lsmod:
Module                  Size  Used by
bnep                   18281  2 
rfcomm                 47604  0 
bluetooth             180104  10 bnep,rfcomm
parport_pc             32866  0 
ppdev                  17113  0 
snd_hda_codec_idt      70795  1 
snd_hda_intel          33773  3 
snd_hda_codec         127706  2 snd_hda_codec_idt,snd_hda_intel
snd_hwdep              13668  1 snd_hda_codec
snd_pcm                97188  2 snd_hda_intel,snd_hda_codec
snd_seq_midi           13324  0 
snd_rawmidi            30748  1 snd_seq_midi
snd_seq_midi_event     14899  1 snd_seq_midi
snd_seq                61896  2 snd_seq_midi,snd_seq_midi_event
snd_timer              29990  2 snd_pcm,snd_seq
snd_seq_device         14540  3 snd_seq_midi,snd_rawmidi,snd_seq
snd                    78855  15 
snd_hda_codec_idt,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
i915                  468651  3 
mac_hid                13253  0 
soundcore              15091  1 snd
snd_page_alloc         18529  2 snd_hda_intel,snd_pcm
drm_kms_helper         46978  1 i915
drm                   242038  4 i915,drm_kms_helper
psmouse                87603  0 
mei                    41616  0 
serio_raw              13211  0 
i2c_algo_bit           13423  1 i915
video                  19596  1 i915
lp                     17799  0 
parport                46562  3 parport_pc,ppdev,lp
firewire_ohci          41000  0 
firewire_core          63558  1 firewire_ohci
usbhid                 47199  0 
crc_itu_t              12707  1 firewire_core
hid                    99559  1 usbhid
e1000e                156693  0 
pata_marvell           12912  0 

and /dev/fw0 exists even when the camcorder is disconnected.


However:

rhk@videoripa:~$ dvgrab -i
Error: no camera exists

rhk@videoripa:~$ sudo dvgrab -i
Error: no camera exists


Anyone got any ideas...?

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Title:
  firewire_core: skipped bus generations, destroying all nodes

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