[alsa-devel] Regression in sound/usb/

Daniel Mack zonque at gmail.com
Thu Jul 12 15:20:36 CEST 2012

On 12.07.2012 11:18, Philipp Dreimann wrote:
> On 12 July 2012 01:10, Daniel Mack <zonque at gmail.com> 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.
> The issue seems to be fixed for me. Let's hope that it'll make it in
> the next v3.5-rc.

Thanks for testing. I just sent two patches. Combined, they are
identical to what you tested. Anyone else wants to add a Tested-by?


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