Hello,
I have a strange behabiour with sound card usb.
I use kernel 3.18.11-rt7 (real-time kernel )
It takes 10 (!) seconds between detection of usb device till it is
registered ("registered new interface driver snd-usb-audio") in
kernel.
We take the usb device out of reset using another HW.
See below dmesg:
[ 7.911220] ixgbe 0000:01:00.1: registered PHC device on eth1
[ 8.186213] ixgbe 0000:01:00.1 eth1: NIC Link is Up 1 Gbps, Flow
Control: RX/TX
[ 8.218386] NET: Registered protocol family 10
[ 8.691077] ixgbe 0000:01:00.0 eth0: NIC Link is Down
[ 9.090808] ixgbe 0000:01:00.1 eth1: NIC Link is Down
[ 9.893587] ixgbe 0000:01:00.0 eth0: NIC Link is Up 1 Gbps, Flow
Control: RX/TX
[ 10.317939] ixgbe 0000:01:00.1 eth1: NIC Link is Up 1 Gbps, Flow
Control: RX/TX
[ 38.171328] random: nonblocking pool is initialized
[ 260.380461] usb 1-2: new full-speed USB device number 2 using xhci_hcd
[ 260.545907] usb 1-2: config 1 has an invalid descriptor of length
0, skipping remainder of the config
[ 260.546471] usb 1-2: New USB device found, idVendor=0451, idProduct=9010
[ 260.546478] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 260.546484] usb 1-2: Product: TI C55 Ver 6.00
[ 260.546488] usb 1-2: Manufacturer: Texas Instruments
[ 260.546491] usb 1-2: SerialNumber: 320001
[ 260.594916] input: Texas Instruments TI C55 Ver 6.00 as
/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.3/0003:0451:9010.0001/input/input3
[ 260.595084] hid-generic 0003:0451:9010.0001: input,hidraw0: USB HID
v1.11 Device [Texas Instruments TI C55 Ver 6.00] on
usb-0000:00:14.0-2/input3
[ 260.595153] usbcore: registered new interface driver usbhid
[ 260.595157] usbhid: USB HID core driver
[ 345.706843] usbcore: registered new interface driver snd-usb-audio
Is there any idea what can cause this delay ?
Regards,
Ran
