Hello,
I posted a bug to kernel.org and have been asked to send it to this
mailing list.
After the 3.13 Kernel series I experience that it can take an arbitrary
amount of time/retries to identify the USB devices in my system. The
issue became apparent when I could not start my new kernel most of the
times because the usb Keyboard did not work.
Attaching the USB Keyboard to a non USB 3.0 port works around the
problem, however devices on USB 3.0 ports only become available after
the initialization completes.
In essence the kernel keeps printing messages like this:
[ 52.162998] usb 1-1: new high-speed USB device number 126 using
xhci_hcd
[ 52.571026] usb 1-1: new high-speed USB device number 127 using
xhci_hcd
[ 52.979031] usb 1-1: new high-speed USB device number 2 using
xhci_hcd
[ 53.387013] usb 1-1: new high-speed USB device number 3 using
xhci_hcd
Until finally it gets to the point where it manages to identify my
hardware and it starts working as expected/desired:
[ 1569.527617] usb 1-1: new high-speed USB device number 65 using xhci_hcd
[ 1569.713176] usb 1-1: New USB device found, idVendor=174c, idProduct=2074
[ 1569.713179] usb 1-1: New USB device strings: Mfr=2, Product=3,
SerialNumber=0
[ 1569.713180] usb 1-1: Product: ASM107x
[ 1569.713181] usb 1-1: Manufacturer: ASUS Tek.
[ 1569.714489] hub 1-1:1.0: USB hub found
[ 1569.714634] hub 1-1:1.0: 4 ports detected
[ 1570.003698] usb 1-1.3: new full-speed USB device number 66 using xhci_hcd
[ 1570.135094] usb 1-1.3: New USB device found, idVendor=1395,
idProduct=1000
[ 1570.135096] usb 1-1.3: New USB device strings: Mfr=3, Product=1,
SerialNumber=0
[ 1570.135098] usb 1-1.3: Product: Sennheiser 3D G4ME1
[ 1570.135099] usb 1-1.3: Manufacturer: Sennheiser
[ 1570.136884] input: Sennheiser Sennheiser 3D G4ME1 as
/devices/pci0000:00/0000:00:1c.1/0000:07:00.0/usb1/1-1/1-1.3/1-1.3:1.3/0003:1395:1000.0004/input/input16
[ 1570.191662] hid-generic 0003:1395:1000.0004: input,hidraw3: USB HID
v1.00 Device [Sennheiser Sennheiser 3D G4ME1] on usb-0000:07:00.0-1.3/input3
[ 1570.248947] usbcore: registered new interface driver snd-usb-audio
However, if you note the timestamp, almost half an hour of uptime before
all of usb is up, this seems very underwhelming.
The full Bug information can be found at
https://bugzilla.kernel.org/show_bug.cgi?id=93681
Kind regards
Malte
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