Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I just installed the Logitech k350 keyboard and m510 mouse not working unless I unplug and replug dongle up to 20 times. (This is on Ubuntu 12.04, I tried this replacing an existing keyboard and mouse and also reinstalling the OS)

I found a number of posts similar to this but the scenario was a little different, and the solution did not help.

The best I got was run this in a start up script:

rmmod hid_logitech_dj
modprobe hid_logitech_dj

I tried that (as well as modprobe -r hid_logitech_dj) and still have to unplug and plug the dongle several times. I also try variations of that, such as a for loop that runs that 10, 20 and 50 times, I even set it to sleep for a couple seconds after each command.

When running that script manually with the for loop I find it randomly either works or doesn't work. IE. I can run it 10 times and 5 times I will have keyboard and mouse, and 5 times I will have to unplug and replug the dongle (once or twice).

The other thing I tried was, #1 the startup script, and #2 also a cronjob that would run every minute to run those commands, after 10 minutes, I didn't have keyboard or mouse. However when I rebooted and left the computer on over night, I had keyboard and mouse in the morning.

Does anyone know a reliable solution for this? The best I have found is the startup script, the crontab, but even after about a 10 minutes I still have unplug and replug the dongle, which isn't a great solution, when you got an SSD harddrive for lightning fast boot times.


share|improve this question

This issue seems often to occur on USB 3.0 ports, so try a USB 2.0 before continuing.

If switching ports does not work, you can try my suggestions on Arch Linux forums, you can try to force a re-enumeration of Unified devices. This can be done by writing a special request to the receiver:

# should output /dev/hidrawN where N is usually 0
hidraw=/dev/$(cd /sys/bus/hid/drivers/logitech-djreceiver/*/hidraw && echo hidraw*)
printf '\x20\xff\x81\0\0\0\0\0\0\0\0\0\0\0\0' | sudo tee "$hidraw" >/dev/null

It has been confirmed to work. You only need to perform this action once in a boot, so a startup script should be fine.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.