Which raw device

[arth1]

A single unifying receiver can create multiple raw hid devices:

grep '^HID_NAME=Logitech USB Receiver' /sys/class/hidraw/hidraw*/device/uevent
/sys/class/hidraw/hidraw0/device/uevent:HID_NAME=Logitech USB Receiver
/sys/class/hidraw/hidraw1/device/uevent:HID_NAME=Logitech USB Receiver
/sys/class/hidraw/hidraw2/device/uevent:HID_NAME=Logitech USB Receiver

The documentation should state whether the command needs to be run against each of these or not.

[treeder]

Hmm, good question, I didn't notice that. I've just used the first one I find. Do you have multiple logitech usb receivers plugged in?

[arth1]

Nope, just one. It creates three hidraw devices. From dmesg:

[ 4.023771] generic-usb 0003:046D:C52B.0001: input,hidraw0: USB HID v1.11 Keyboard [Logitech USB Receiver] on usb-0000:00:1d.0-1.6.4/input0
[ 4.025906] generic-usb 0003:046D:C52B.0002: input,hiddev96,hidraw1: USB HID v1.11 Mouse [Logitech USB Receiver] on usb-0000:00:1d.0-1.6.4/input1
[ 4.028485] generic-usb 0003:046D:C52B.0003: hiddev97,hidraw2: USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:00:1d.0-1.6.4/input2

So, presumably the first one (hidraw0) is for keyboard, the second one (hidraw1) for mice, and the third one for other.

[ghost]

I think it doesn't matter, just try them all until you get the "Switch your device on to pair it." message.

[nam20485]

I had one entry for each physical unifying receiver and one each for both my keyboard and mouse (4). When I pulled the unifying receiver the mouse had been paired with both of those entries disappeared. cat'ting proc gave me just the one unifying receiver and keyboard entries (2) at that point.

I expect other peoples' mileage might vary though.

Worked like a charm the first time for me.

[Lekensteyn]

You can use ls -ld /sys/class/hidraw/hidraw*/device/driver to discover the device you need. Trimmed example:

$ ls -ld /sys/class/hidraw/hidraw*/device/driver
/sys/class/hidraw/hidraw0/device/driver -> ../../../../../../../../bus/hid/drivers/logitech-djreceiver
/sys/class/hidraw/hidraw1/device/driver -> ../../../../../../../../../bus/hid/drivers/logitech-djdevice

In this case, hidraw0 is the device that you are looking for. This is used in the ltunify tool.