Control: tag -1 moreinfo
On Tue, 2013-05-14 at 19:12 +0100, Richard Kettlewell wrote:
> On 2013-05-14 03:02, Ben Hutchings wrote:
> > What are the contents of
> > /sys/devices/pci0000:00/0000:00:1d.7/usb2/2-4/quirks under 3.2?
> >
> > (I'm assuming the webcam shows up at address 2-4 again - check what the
> > kernel log shows as the address, alongside the manufacturer and product
> > names.)
>
> $ cat
> /sys/devices/pci0000:00/0000:00:1a.7/usb1/1-2/{idVendor,idProduct,serial}
> 046d
> 0825
> 2F31AED0
> $ cat /sys/devices/pci0000:00/0000:00:1a.7/usb1/1-2/quirks
> 0x2
[...]So this has correctly been assigned the quirk USB_QUIRK_RESET_RESUME, which is needed by recent Logitech webcams. Apparently, the usual symptom of the bug it works around is a 'chipmunk' sound due to audio being captured at the wrong frequency, which made me wonder whether the warnings about frequency setting could also be caused by missing this quirk. Could you test some of the intermediate kernel versions at http://snapshot.debian.org/package/linux/ to work out which upstream version fixed this? Ben. -- Ben Hutchings Gates has joked that everything goes on and off unexepectedly in the house, which is run by a high-end PC network built on Windows NT. - Seattle Times
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