From owner-freebsd-stable@FreeBSD.ORG  Wed Dec 10 23:04:42 2014
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Date: Thu, 11 Dec 2014 00:04:39 +0100
From: "Herbert J. Skuhra" <herbert@oslo.ath.cx>
To: stable@freebsd.org
Subject: Re: Kbd problem in 10.1-STABLE
Message-ID: <20141210230439.GA5740@oslo.ath.cx>
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On Wed, Dec 10, 2014 at 03:20:45PM +0000, Filippo Moretti via freebsd-stable wrote:
> My kbd (Logitech Deluxe 660 cordless) no longer works after updating
> 10.1-STABLE from November 24 to December 8.The kernel configuration file
> is unchanged,the mouse which is on the same receiver
> works.root@sting:/home/filippo # uname -a
> FreeBSD sting 10.1-STABLE FreeBSD 10.1-STABLE #6 r274620: Mon Nov 24
> 19:02:17 CET 2014     root@sting:/usr/obj/usr/src/sys/STING_VT  i386
> I booted kernel.old and everything works.

Try to enable kbdmux or revert r274861.

There is already a PR for this issue:

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=195491

-- 
Herbert