On Fri, 20 Aug 2004, Theodore Kilgore wrote: > Obviously, it could be both which are slightly out-of-spec.
Yep. > As to the > camera, I cannot even be sure that S&Q Technologies (www.sq.tw) is even a > real manufacturer. Could even be the case that they package chips that > somebody else makes, and I have no way to find out. As to documentation, > there is practically none worthy of mention on their website, And they > even did not answer an official request a few months ago, concerning > how to dump the memory of the camera. The request was from the National > Forensic Institute of the Netherlands. It's often difficult to deal with Taiwanese companies, even in the best of circumstances. > Anyway without doing some testing > that I currently do not know how to do, I don't know if their chips are > within spec, or not. It's not easy, and it probably requires specialized testing equipment. The bare minimum would be a decent oscilloscope. And then you'd have to take apart a USB connector to get access to the leads. > But, as to VIA I have picked up a lot of discussion, and there are those > who claim there are problems with VIA USB implementation, especially with > some of their older chips. Yes indeed. > So I was wondering about that. I also have the > understanding that there has been a great deal of information given by VIA > to the kernel development people. Hah! I wish! The true situation is exactly the opposite. > What I actually have is the VIA 82C686 chipset, and here's what lspci -v > says about my USB controllers: > > 00:14.2 USB Controller: VIA Technologies, Inc. USB (rev 10) (prog-if 00 > [UHCI]) > Subsystem: VIA Technologies, Inc. (Wrong ID) USB Controller > Flags: bus master, medium devsel, latency 32, IRQ 5 > I/O ports at d800 [size=32] > Capabilities: [80] Power Management version 2 > > 00:14.3 USB Controller: VIA Technologies, Inc. USB (rev 10) (prog-if 00 > [UHCI]) > Subsystem: VIA Technologies, Inc. (Wrong ID) USB Controller > Flags: bus master, medium devsel, latency 32, IRQ 5 > I/O ports at dc00 [size=32] > Capabilities: [80] Power Management version 2 > > Sorry, I have no idea what is meant by "(Wrong ID)". > > > So if anyone has an idea where the problem might be addressed, I am > willing to try to tweak something in the USB setup. I don't think there's much that can be tweaked. Do you suppose that timing might be involved here? I mean the time between messages sent by gphoto2. If one computer is much slower or faster than the other, perhaps the messages are arriving at the camera too quickly or too slowly. 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
