I get back to home I'll dig out my usb audio adapters and post sample kernel log.
[24293.617187] musb_stage0_irq 570: VBUS_ERROR in a_wait_bcon (91, <VBusValid), retry #1, port1 00000100 [24293.835937] musb_stage0_irq 646: CONNECT (a_host) devctl 5d [24293.835937] hub 1-0:1.0: state 8 ports 1 chg 0000 evt 0000 [24293.835937] usb usb1: usb auto-resume [24293.835937] usb usb1: finish resume [24293.835937] hub 1-0:1.0: hub_resume [24293.859375] hub 1-0:1.0: port 1, status 0101, change 0001, 12 Mb/s [24294.015625] hub 1-0:1.0: debounce: port 1: total 100ms stable 100ms status 0x101 [24294.140625] usb 1-1: new full speed USB device using musb_hdrc and address 2 [24294.273437] usb 1-1: ep0 maxpacket = 8 [24294.273437] usb 1-1: skipped 11 descriptors after interface [24294.273437] usb 1-1: skipped 2 descriptors after interface [24294.273437] usb 1-1: skipped 1 descriptor after endpoint [24294.273437] usb 1-1: skipped 2 descriptors after interface [24294.273437] usb 1-1: skipped 1 descriptor after endpoint [24294.273437] usb 1-1: skipped 2 descriptors after interface [24294.273437] usb 1-1: skipped 1 descriptor after endpoint [24294.273437] usb 1-1: default language 0x0409 [24294.273437] usb 1-1: new device strings: Mfr=1, Product=2, SerialNumber=0 [24294.273437] usb 1-1: Product: Logitech USB Headset [24294.273437] usb 1-1: Manufacturer: Logitech [24294.273437] usb 1-1: device v046d p0a01 is not supported [24294.273437] usb 1-1: uevent [24294.273437] usb 1-1: usb_probe_device [24294.273437] usb 1-1: configuration #1 chosen from 1 choice [24294.273437] usb 1-1: adding 1-1:1.0 (config #1, interface 0) [24294.273437] usb 1-1:1.0: uevent [24294.273437] usbtest 1-1:1.0: usb_probe_interface [24294.273437] usbtest 1-1:1.0: usb_probe_interface - got id [24294.281250] snd-usb-audio 1-1:1.0: usb_probe_interface [24294.281250] snd-usb-audio 1-1:1.0: usb_probe_interface - got id [24294.304687] usb 1-1: adding 1-1:1.1 (config #1, interface 1) [24294.304687] usb 1-1:1.1: uevent [24294.304687] usb 1-1: adding 1-1:1.2 (config #1, interface 2) [24294.304687] usb 1-1:1.2: uevent [24294.304687] drivers/usb/core/inode.c: creating file '002' [24294.304687] hub 1-0:1.0: 100mA power budget left [24294.304687] hub 1-0:1.0: state 7 ports 1 chg 0000 evt 0002 [24294.304687] hub 1-0:1.0: port 1 enable change, status 00000103
# cat /proc/asound/cards 0 [EAC ]: EAC - OMAP24xx EAC OMAP24xx EAC with codec TLV320AIC33 1 [Headset ]: USB-Audio - Logitech USB Headset Logitech Logitech USB Headset at usb-musb_hdrc-1, full speed # cat /proc/asound/pcm 01-00: USB Audio : USB Audio : playback 1 : capture 1