As requested by David Brownell (below), I am forwarding this message to "one of the public mailing lists." Anyone who has something to say about it, please copy to me in the answer, as I am not subscribed to the linux-usb-devel list. Thanks.
Also, as indicated in my original request, I will send any log files or additional information which is desired. But for starters, I do not intend to spam everybody with un-needed and unwanted, possibly extraneous information. Ask me for what you need, and I will send it to you. Thanks again. Theodore Kilgore ---------- Forwarded message ---------- Date: Tue, 17 Aug 2004 13:07:14 -0700 From: David Brownell <[EMAIL PROTECTED]> To: Theodore Kilgore <[EMAIL PROTECTED]> Subject: Re: VIA problems, or what? Hi, Sounds to me like maybe you've got a race somewhere, or maybe you really do have a problem with the VIA UHCI. Try it with OHCI, or with EHCI through a USB 2.0 hub ... that'll help establish whether it's UHCI only. Also please take the query to one of the public mailing lists. - Dave On Tuesday 17 August 2004 10:29 am, you wrote: > David, > > I am a developer for gphoto2-libgphoto2, doing camera support, mainly. I > have written the sq905 camera driver, which contains support for a wide > range of cheap cameras which use the sq905 chipset, from S&Q Technologies, > Taiwan. > > Quite recently, I went down to WalMart and bought another cheap camera, > the Argus DC-1730, which seems to use a slightly fancier chip from S&Q; it > seems that the camera probably has in it the sq913, which permits "TV > support" (the camera has on it an LCD display on the rear, which is > standard on more expensive digital cameras). I tested the camera with my > existing sq905 driver, and it worked just fine, "out of the box." > > That was on my test machine, which is an old Dell, using a Pentium3 1Gig > and an Intel chipset. > > Then I tried the same camera with the same code on my usual machine, which > uses an Athlon Thunderbird on a FIC AZ-11 board, with VIA KT166 chipset. > On this machine, the camera will not work. The reason is that the request > to download data is honored approxomately 50% of the time only, and on > other occasions when the appropriate place in the driver program comes up, > I get a message which says that X bytes are being downloaded, but no bytes > are in fact downloaded (I would see them in the log output and they are > not there). > > Since I am running the same code on boxes, with the same release of the > same distro (Slackware-10.0 in both cases), and the same kernel 2.6.7 (and > it does not make any difference if I drop back to a 2.4 kernel on the > Athlon box, either), it seems to me that this is most probably an issue of > hardware interaction. Also, both boxes claim to support USB2.0. I did not > have the support for this installed originally on either box. After I > noticed the problem I installed it on both boxes, too. That did not seem > to have any effect, either. > > I would be willing to send any other relevant information, including > output of lspci, kernel config file, debug output of gphoto2 in debug mode > (though at this point I probably know more about that than the recipient) > or whatever. > > > Thank you very much, > > Theodore Kilgore > Footnote to this message: To make things perfectly clear, the problem described is _only_ with this new camera. Everything else, including in particular all other cameras in my possession which are supported by the same libgphoto2/camlibs/sq905 driver, work very nicely on both machines. ------------------------------------------------------- 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
