On Fri, 20 Aug 2004, Theodore Kilgore wrote: > Well, yes, and no, I would suspect. I would guess that so long as two > cameras use the same controller chip, they are pretty much identical. The > issue with this particular camera could well be, that I seem to have a new > chip from the manufacturer of an older chip, for which the driver routine > is quite well established. And the new chip runs with the old driver code > on one of my boxes, but not on the other.
> I am glad to have the opinion of someone more knowledgeable that I am > about the "guts" of the system about this. It does help to narrow things > down. Still, I do wonder why the camera functions perfectly on one > computer and not on the other. I would think that if the camera does not > like gphoto2's command sequence, it would not work on either one of the > boxes, or if it finds nothing objectionable it would work on both. Don't > take this as an argumentative stance, please. I am just restating that I > am puzzled. You're right about the command sequences. Maybe what's going on is that either the USB controller on your computer or the controller on the camera is slightly out-of-spec, with the result that they don't work with each other but they each do work with other cameras/computers. > Gphoto2 is a "userspace" program which uses libusb to communicate with the > USB system. Could it be that the glitches come from somewhere within > libusb? If so, then, since apparently your expertise is in the kernel USB > area, who is the expert on libusb and how would it be possible to localize > the source of any problems from that side? I don't think libusb is your problem. It just passes the program's requests to the kernel. Alan Stern ------------------------------------------------------- SF.Net email is sponsored by Shop4tech.com-Lowest price on Blank Media 100pk Sonic DVD-R 4x for only $29 -100pk Sonic DVD+R for only $33 Save 50% off Retail on Ink & Toner - Free Shipping and Free Gift. http://www.shop4tech.com/z/Inkjet_Cartridges/9_108_r285 _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
