Hi Florian, >> However, I'm still getting a different kind of error: after capturing >> some 100 frames, my VIDIOC_DQBUF ioctl will fail with -EIO. I'm using >> revision 84 with a small part of the patch from Evgeny (only the 500 us >> delay after control transfers). > Just for reference: I seem to have fixed my problem, at least sort of, > by spending money :-) I went to the next computer store and bought a new > USB 2.0 controller card, this time with a NEC chipset, and the camera > has now been running stable for at least 40 minutes, even with frequent > control requests.
That's good news! > So, as far as I can tell, it works with: > > 02:0a.2 Class 0c03: 1033:00e0 (rev 04) > > 02:0a.2 USB Controller: NEC Corporation USB 2.0 (rev 04) (prog-if 20 > [EHCI]) > Subsystem: DTK Computer PTI-205N USB 2.0 Host Controller Can you tell me the name of the product you bought? Maybe I can get one of those for testing ... > and fails quite reliably with: > > 00:1d.7 Class 0c03: 8086:24cd (rev 02) > > 00:1d.7 USB Controller: Intel Corporation 82801DB/DBM (ICH4/ICH4-M) USB2 > EHCI Controller (rev 02) (prog-if 20 [EHCI]) > Subsystem: ASUSTeK Computer Inc. Unknown device 8089 > > I didn't use audio in any case. The only difference between the two > controllers is that the non-working one has an UHCI companion > controller, the working one has OHCI. Audio hasn't created any issues that I know of. I've no idea whether the type of the USB 1.1 controller part is somehow related to the issue, but it's something to keep in mind! > Would it make sense to create a Wiki or something like that in order to > collect working and non-working controllers? Or is the influence of > other factors so large that this is useless? I'm working on a general Wiki for all sorts of webcam information. I think your suggestion is a good idea if it turns out that different people with same host controller have comparable experiences. In case you want to contribute to such a database, let me know ... Thanks for all the valuable information! Cheers, Martin _______________________________________________ Linux-uvc-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
