From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Dr. David Alan Gilbert" Subject: Re: Wonkiness with keyboard adapter - not sure if it's in USB or input systems Date: Wed, 27 Apr 2011 18:27:18 +0100 Message-ID: <20110427172718.GA16118@gallifrey> References: <11501.1303832820@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <11501.1303832820@localhost> Sender: linux-kernel-owner@vger.kernel.org To: Valdis.Kletnieks@vt.edu Cc: Jiri Kosina , Greg Kroah-Hartman , Dmitry Torokhov , linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, linux-input@vger.kernel.org List-Id: linux-input@vger.kernel.org * Valdis.Kletnieks@vt.edu (Valdis.Kletnieks@vt.edu) wrote: > Running 2.6.39-rc1-mmotm at the moment on a Dell Latitude E6500, that wants an > external USB keyboard/mouse and monitor when it's in its docking station in the > office. I have an old Microsoft Natural keyboard that has a PS/2 connector, but > I like the tactile feel so I didn't want to get rid of it. So we recently got > some PS2->USB adapters, which appear in lsusb as follows: > > Bus 001 Device 006: ID 0e8f:0020 GreenAsia Inc. USB to PS/2 Adapter > > Now, when I first power up the laptop in the docking station, it *does* see the > keyboard just fine, and Grub is able to talk to it, and everything works (this > particular boot, I was able to hit the space bar to get to the Grub menu, use > arrow up/down to move between entries, all looked good). So it isn't like the > device needs any initialization above and beyond what the BIOS is doing at > initial power-on. > > However, when the Linux kernel starts up, it sees the adapter, but doesn't > recognize key presses until I disconnect and then reconnect the keyboard: I've experienced the same behaviour on at least two very different machines (one a Tosh laptop, the other a Dell desktop), in both cases using a Model M PS/2 keyboard connected to two different USB<->PS/2 converters (one a really ancient Belkin one and the other a recent no-name soap-on-a-rope type thing). Dave -- -----Open up your eyes, open up your mind, open up your code ------- / Dr. David Alan Gilbert | Running GNU/Linux | Happy \ \ gro.gilbert @ treblig.org | | In Hex / \ _________________________|_____ http://www.treblig.org |_______/