[Coriander-user] Display rate > 0 but window blank, save rate > 0 and save OK--How can it be?!?

[Marco B. <m.b...@in...>]

Dear All,

after (satisfactorily) playing for about two months with Basler A604 
1394 camera and coriander (the installed version on under Ubuntu Breezy, 
i386 arch) by connecting it to the on-board 1394 port of a HP
Pavilion PC (Chipset maker: VIA), now I need to use the same camera with
a different PC (somewhat older--a Pentium II/233--but usable: about 300M RAM) 
and a Matrox Meteor II 1394 PCI card.

I experience strange problems:

Test 1 (with the PIII setup). 640x480 resolutions ok. However Larger resolutions
result in no image being displayed (black window on screen), although both 
receive and display frequency display the expected rates (> 0). Images 
*can be saved!* (and save frequency display fine), and are exactly as expected 
when accessed later. Both Raw1394 and Video1394 can be used with the same results: 
limited success with display; full success with save.

[Test 2. I installed the Matrox II-1394 on the HP Pavilion PC where the
onboard 1394 ports work very fine. When I access the camera through the
MII-1394 I am unable to obtain any transfer at all with Video1394. Only
Raw1394 produces a data transfer. This last test was performed to make
sure that using the MII-1394 actually _made some difference_.]

[Test 3. Compiled vanilla 2.6.15.4 kernel (appearently, there are a bunch 
of changes in the 1394 drivers) and tried again on the same hw as test 1. 
*No change* at all.]

Test 4. Export display from the machine where coriander & the camera are
installed and launched coriander from the remote display. Nope, coriander
won't start from there. I understand that perhaps coriander is not a fully network-
transparent app--may this suggest that the video card I am using is not up to
the required task? From lspci:

0000:01:00.0 VGA compatible controller: ATI Technologies Inc 3D Rage Pro AGP 1X/2X (rev 5c)

I am rather puzzled. The fact that test 1. (with the prospective hw/sw setup 
allows *saving* the images just fine in all possible conditions makes me
suspect some problem in the visualisation/video card, but I'm unsure. 
No problem whatsoever with any other app, though.

Thank you in advance for any suggestion you may give me.

Regards from

		Marco Bravi
-- 
Marco Bravi <m....@in...>
Dip. Ing. Chimica M. M. P. M.