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[cjp <cjp@xxxxxxx>]

Ok, to 8300 shows up, disconnects, and then becomes 8501.  That would
suggest to me firmware is loading. (hal and ift-callout are a little
*too* quiet... no dmesg output on success?) But still this "No valid
video chain found." error...

cjp@byzantium:~$ dmesg | egrep '(uvcvideo|5\-4)'
[   28.535584] usb 5-4: new high speed USB device using ehci_hcd and address 3
[   28.672008] usb 5-4: configuration #1 chosen from 1 choice
[   41.023834] uvcvideo: iSight firmware: firmware successfully loaded.
[   41.023844] uvcvideo: Found UVC 0.00 device <unnamed> (05ac:8300)
[   41.023849] uvcvideo: No valid video chain found.
[   41.023895] usbcore: registered new interface driver uvcvideo
[   41.095860] usb 5-4: USB disconnect, address 3
[   42.775095] usb 5-4: new high speed USB device using ehci_hcd and address 6
[   42.908247] usb 5-4: configuration #1 chosen from 1 choice
[   42.908503] uvcvideo: Found UVC 1.00 device Built-in iSight (05ac:8501)
[   42.908525] uvcvideo: No valid video chain found.

-- 
uvcvideo: iSight firmware loading does not work
https://bugs.launchpad.net/bugs/185634
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Support, which is the registrant for Mactel Support.

Status in Apple Built-in iSight Firmware Tools for Linux: Fix Released
Status in Mactel Support: Confirmed
Status in Source Package "linux-ubuntu-modules-2.6.24" in Ubuntu: New
Status in Source Package "ubuntu-meta" in Ubuntu: Confirmed

Bug description:
Binary package hint: linux-restricted-modules-2.6.24-4-generic

I am having problems with my iSight webcam in Hardy. I have copied AppleUSBVideoSupport to the firmware directory, but when I insert the isight_usb module I get:

[26902.255394] uvcvideo: iSight: firmware loading init failed
[26902.255745] usbcore: registered new interface driver isight
[26902.255749] USB Video Class driver (v0.1.0)