as folks on -current may have noticed... the 3.10 kernel breaks logitech mice and keyboards that use the unifying receivers and usb 3.0.
Bug is reported here:
and thankfully, there is a solution that is working... for now at least.
First get and build this code:
git clone https://git.lekensteyn.nl/ltunify.git
then when you need to pair the device
./ltunify -d /dev/hidraw0 unpair 1
./ltunify -d /dev/hidraw0 pair 10
that should do it.
just for reference, some lkml notes: