mactel-support team mailing list archive

[Miguel Ángel Vilela <miguev@xxxxxxxxx>]

Latest (current trunk) uvcvideo doesn't work for me. Ben, can you please provide more details about you system and you got it working?
Mine is MacBook Core 2 Duo (November 2006) with Kubuntu 8.04

$ uname -a
Linux binky 2.6.24-16-generic #1 SMP Thu Apr 10 13:23:42 UTC 2008 i686 GNU/Linux

$ grep ideo /var/log/dmesg
[   45.797052] Linux video capture interface: v2.00
[   45.976039] uvcvideo: Found UVC 1.00 device Built-in iSight (05ac:8501)
[   45.976048] uvcvideo: No valid video chain found.
[   46.124883] usbcore: registered new interface driver uvcvideo
[   46.124887] USB Video Class driver (v0.1.0)

$ lsmod | grep ideo
uvcvideo               58116  0
compat_ioctl32          2304  1 uvcvideo
videodev               29440  1 uvcvideo
v4l1_compat            15492  2 uvcvideo,videodev
v4l2_common            18304  2 uvcvideo,videodev
video                  19856  0
output                  4736  1 video
usbcore               146028  8 hci_usb,uvcvideo,appleir,appletouch,usbhid,ehci_hcd,uhci_hcd

$ lsusb -s 005:003
Bus 005 Device 003: ID 05ac:8501 Apple Computer, Inc. Built-in iSight [Micron]
(find lsusb -v -s 005:003 output attached)

** Attachment added: "lsusb -v -s 005:003"
   http://launchpadlibrarian.net/14034575/lsusb-v-s.txt

-- 
[hardy] uvcvideo: No valid video chain found with isight
https://bugs.launchpad.net/bugs/216310
You received this bug notification because you are a member of Mactel
Support, which is the registrant for Mactel Support.

Status in Mactel Support: Confirmed
Status in Source Package "linux-ubuntu-modules-2.6.24" in Ubuntu: Confirmed

Bug description:
The isight firmware gets loaded correctly but it fails to register a video device:
[   62.810912] uvcvideo: No valid video chain found.

My system is up2date as of today.

Linux helios 2.6.24-16-generic #1 SMP Thu Apr 10 13:23:42 UTC 2008 i686 GNU/Linux

The driver fails in uvc_driver.c:
list_for_each_entry(streaming, &dev->streaming, list) {
                        if (streaming->header.bTerminalLink == term->id) {
                                dev->video.streaming = streaming;
                                found = 1;
                                break;
                        }
                }

                if (found)
                        break;
        }

        if (!found) {
                uvc_printk(KERN_INFO, "No valid video chain found.\n");
                return -1;
        }

I will attach lsusb -vv