On Wed, 9 May 2007, Michael St. Laurent wrote:
> It's showing two keyboards? There is only one connected. It must be
> some kind of 'phantom' keyboard presented by the KVM switch. The real
> keyboard is the Logitech one.
The KVM switch has no intelligence of its own, so it can't create
"phantoms". Furthermore this thing shows up behind a hub; again something
the switch couldn't do.
What exactly have you got plugged in to the KVM switch? Is it a keyboard
with USB ports attached and the trackball plugged into one of the ports?
How many ports are there? Is anything plugged into any of the other
ports?
Here's a cut-down version of your output, showing what's connected to the
switch. First you've got a hub. It might be built into the keyboard:
Bus 002 Device 006: ID 058f:9254 Alcor Micro Corp. Hub
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 9 Hub
bDeviceSubClass 0 Unused
bDeviceProtocol 0 Full speed (or root) hub
bMaxPacketSize0 8
idVendor 0x058f Alcor Micro Corp.
idProduct 0x9254 Hub
bcdDevice 3.12
iManufacturer 1 ALCOR
iProduct 2 Generic USB Hub
iSerial 0
Plugged into the hub are three low-speed devices. First is a keyboard
(with 2 interfaces -- I have no idea what the reason is for that!):
Bus 002 Device 007: ID 046d:c312 Logitech, Inc.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x046d Logitech, Inc.
idProduct 0xc312
bcdDevice 1.00
iManufacturer 1 BTC
iProduct 2 USB Multimedia Keyboard
iSerial 0
Then there's the Trackball:
Bus 002 Device 008: ID 046d:c404 Logitech, Inc. TrackMan Wheel
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x046d Logitech, Inc.
idProduct 0xc404 TrackMan Wheel
bcdDevice 2.20
iManufacturer 1 Logitech
iProduct 2 Trackball
iSerial 0
Finally there's this funny thing. It might be a keypad or something
like that:
Bus 002 Device 009: ID 10d5:000d Uni Class Technology Co., Ltd
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x10d5 Uni Class Technology Co., Ltd
idProduct 0x000d
bcdDevice 1.00
iManufacturer 1 No brand
iProduct 2 SP04-A1
iSerial 3 2ôÒ
Anything there look familiar? I'll include a portion of the other
descriptors from this device:
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 59
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 4 HID Mouse
bmAttributes 0x80
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Devices
bInterfaceSubClass 0 No Subclass
bInterfaceProtocol 0 None
iInterface 7 Keyboard
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 10
So interface 0 appears to be a more-or-less normal HID object. Hard to
say just what it is, though.
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Devices
bInterfaceSubClass 0 No Subclass
bInterfaceProtocol 0 None
iInterface 6 Mouse
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 10
Interface 1 doesn't have an Interrupt-IN endpoint. That's what your error
messages are complaining about. Such an endpoint is mandatory according
to the USB HID specification; the device is definitely in violation of the
spec.
This information should be present on your computer in a more-easily
digestable form in /proc/bus/usb/devices. You may need to mount
/proc/bus/usb first (not all distributions mount it for you):
mount -t usbfs none /proc/bus/usb
Then see what shows up in that file.
Alan Stern
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