Comment 76 for bug 884210

I would like to emphasize that this problem is intermittent; however, I am noticing an increased frequency whenever I have 2 devices that have sound capabilities, in particular microphone sound devices. Similar to Joël Wijngaarde's (original bug reporter) report I am seeing in the syslog messages the following:

Jun 14 10:13:02 mobile-pc pulseaudio[2885]: module.c: Failed to load module "mo
dule-alsa-card" (argument: "device_id="0" name="usb-046d_0991_0E39ACE1-02-U0x46d
0x991" card_name="alsa_card.usb-046d_0991_0E39ACE1-02-U0x46d0x991" tsched=yes ig
nore_dB=no card_properties="module-udev-detect.discovered=1""): initialization f
ailed.
Jun 14 10:13:03 mobile-pc kernel: [ 1529.584231] ALSA sound/usb/clock.c:233: 2:3
:1: cannot set freq 16000 to ep 0x86
Jun 14 10:13:04 mobile-pc kernel: [ 1530.584149] ALSA sound/usb/clock.c:233: 2:3
:1: cannot set freq 16000 to ep 0x86
Jun 14 10:13:05 mobile-pc kernel: [ 1531.584183] ALSA sound/usb/clock.c:233: 2:3
:1: cannot set freq 16000 to ep 0x86

The "sound/usb/clock.c:233" report line repeats several times (> 15 times) and the overall system response time noticeably slows to a grind. The frequency of this intermittent bug occurence appears to be more often when I have more than one audio input device connected:

# lsusb
Bus 001 Device 002: ID 046d:0991 Logitech, Inc. QuickCam Pro for Notebooks

and my native mobo audio device (from "lshw")
pci@0000:00:1b.0 N10/ICH 7 Family High Definition Audio Controller [8086:27D8]

I am observing this bug on a "Lenovo Thinkpad T60p" using the following:

GNU/Linux Distribution: Fedora 14
Kernel: 2.6.35.13-92.fc14.i686.PAE #1 SMP