[alsa-devel] Regression in sound/usb/

[Daniel Mack]

On 12.07.2012 01:10, Daniel Mack wrote:
> On 11.07.2012 09:30, Philipp Dreimann wrote:
> 
>> The camera is now working for a short time:
>> [   56.421399] usb 2-1.2: new high-speed USB device number 4 using ehci_hcd
>> [   57.224234] uvcvideo: Found UVC 1.00 device <unnamed> (046d:0821)
>> [   57.237221] input: UVC Camera (046d:0821) as
>> /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.2/input/input15
>> Camera and microphone are working. Some time later we're back to the old issue:
> 
> So I found the reason for this breakage now. It's about orphaned packets
> that are sent over the wire after alt setting 0 has been selected. The
> chipset doesn't like these at and bails out with protocol errors. Fixing
> this involves some rework of the logic. The patch is unfortunately a
> little big, but I see no option than getting it merged for 3.6.

I meant 3.5, of course.

> Everyone, please test - and sorry for the trouble caused.

To avoid confusion: this patch replaces the other one I sent.


Daniel