USB keyboard not recognized immediately

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http://askubuntu.com – I'm having a problem with a Deltaco TB-229 USB keyboard when booting to Peppermint OS Three. As that is based on Ubuntu, I ask the question here, hope that is fine. The keyboard has worked flawlessly in Windows 7 (it's a dualboot machine). When I boot into Linux, the keyboard does not react (can't login as I can't type the password). However, if I switch it to another USB port, it immediately works and there are no problems for the duration of that session. Next time I reboot, though...same thing. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0001 (HowTos)