On 21 June 2012 17:34, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > On Thu, 21 Jun 2012, Philipp Dreimann wrote: > >> On 20 June 2012 16:20, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: >> > Have you checked the connections between the motherboard and the USB >> > port, inside the computer case? Or have you tried using a different >> > cable? How about attaching a different high-speed device to the same >> > controller? >> >> I cannot check the cables easily, as the system is a notebook. -- I >> connected an usb pen-drive and copied at about 6mb/s 1.1gb to it >> without any warnings. The cable to the webcam cannot be changed. > > You said earlier that the webcam works okay under the 3.4 kernel but > not under 3.5-rc2. In the absence of any better ideas, you can try > doing a git bisection to find the change responsible for the errors. I bisected it and found it in yet another area: usb audio (the webcam has a microphone too..) - 8fdff6a is the last revision where my webcam works - edcd363 does not compile sound/usb/stream.c:80:13: error: static declaration of ‘snd_usb_init_substream’ follows non-static declaration - d399ff9 is the first revision where my webcam is not working, and the following messages in the kernel log: 3:-1:3: cannot set freq 32000 to ep 0x86 uvcvideo: Failed to query (GET_DEF) UVC control 2 on unit 2: -71 (exp. 2). uvcvideo: Failed to set UVC probe control : -71 (exp. 26). -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
