Hi,

On 24.08.2012 21:08, Josh Boyer wrote:

We've had a report[1] that the Logitech USB headset 0003:046D:0A0C isn't working with 3.6-rc3. It seems the last working kernel was based on commit 10c63c9, and it first stopped working with a kernel based on commit 23dcfa6. There are only a few ALSA commits between those revisions, so hopefully this is something that is fairly easy to identify. The only commit to USB audio in that set is:

[...]

!!ALSA/HDA dmesg !!------------------

[ 38.190306] SELinux: initialized (dev configfs, type configfs), uses genfs_contexts [ 38.229616] snd_hda_intel 0000:00:1b.0: irq 66 for MSI/MSI-X [ 38.270699] ALSA sound/usb/mixer.c:866 6:0: cannot get min/max values for control 2 (id 6) [ 38.274097] ALSA sound/usb/mixer.c:866 1:0: cannot get min/max values for control 2 (id 1) [ 38.276753] ALSA sound/usb/mixer.c:866 2:0: cannot get min/max values for control 2 (id 2) [ 38.279322] ALSA sound/pci/hda/hda_auto_parser.c:322 autoconfig: line_outs=1 (0xe/0x0/0x0/0x0/0x0) type:line [ 38.279326] ALSA sound/pci/hda/hda_auto_parser.c:326 speaker_outs=1 (0x11/0x0/0x0/0x0/0x0) [ 38.279329] ALSA sound/pci/hda/hda_auto_parser.c:330 hp_outs=1 (0xd/0x0/0x0/0x0/0x0) [ 38.279331] ALSA sound/pci/hda/hda_auto_parser.c:331 mono: mono_out=0x0 [ 38.279333] ALSA sound/pci/hda/hda_auto_parser.c:335 inputs: [ 38.279336] ALSA sound/pci/hda/hda_auto_parser.c:339 Mic=0x10 [ 38.279342] ALSA sound/pci/hda/hda_auto_parser.c:339 Line=0xf [ 38.285983] usbcore: registered new interface driver snd-usb-audio

Also, according to this dmesg, the device is probed just fine (which the commit you mentioned wouldn't change anything about though).

So what does "isn't working anymore" refer to precisely? Are there any more dmesg entries generated once the stream is started?

Daniel