From mboxrd@z Thu Jan 1 00:00:00 1970 From: Valdis.Kletnieks@vt.edu Subject: Re: Wonkiness with keyboard adapter - not sure if it's in USB or input systems Date: Tue, 26 Apr 2011 20:17:51 -0400 Message-ID: <6382.1303863471@localhost> References: <23191.1303845136@localhost> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1303863471_6090P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Return-path: Received: from lennier.cc.vt.edu ([198.82.162.213]:33659 "EHLO lennier.cc.vt.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752561Ab1D0ASI (ORCPT ); Tue, 26 Apr 2011 20:18:08 -0400 In-Reply-To: Your message of "Tue, 26 Apr 2011 23:29:42 +0200." Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Jiri Kosina Cc: Alan Stern , Greg Kroah-Hartman , Dmitry Torokhov , linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, linux-input@vger.kernel.org --==_Exmh_1303863471_6090P Content-Type: text/plain; charset=us-ascii On Tue, 26 Apr 2011 23:29:42 +0200, Jiri Kosina said: > On Tue, 26 Apr 2011, Valdis.Kletnieks@vt.edu wrote: > > > > > Bus 001 Device 006: ID 0e8f:0020 GreenAsia Inc. USB to PS/2 Adapter > > > > > Have you tried testing the adapter by plugging it in after the system > > > is running? > > > > It works fine at the Grub screen. > > > > It *doesn't* work for the kernel when it initially starts up, even though a few > > seconds ago the hardware worked just fine. > > > > It *does* work after I've unplugged/replugged it - I've tested both the USB > > side and the PS2 side, in either case it starts working. > It seems like the BIOS handover of the USB input device doesn't work > properly. > > The way things usually work in such situations -- BIOS is able to > understand USB input devices in a very basic mode (hidp) and translate the > events into PS/2-looking events, so that things like grub (which don't > understand USB HID) are able to see keyboard events -- BIOS presents those > as PS/2 devices. > > Once kernel is booted, it takes over devices in this 'legacy' mode from > BIOS, and initializes them properly as USB input devices. > > Seems like this process is broken on your system. Could you please try to > disable legacy USB emulation in your BIOS, and see if the problem > persists? (it will make USB keyboard unavailable in grub). Possible datapoint - the USB handoff can't be *totally* broken on the laptop, because it handled another Microsoft Natural keyboard with a USB on it just fine, so it's something specific to the GreenAsia adapter. I disabled legacy USB emulation, and as expected, the keyboard wasn't available to grub. It was *also* unavailable to the initrd until I did the 'disc/reconnect' thing, at which point it started working. (Sorry, don't have the dmesg from that one, can get it tomorrow (Wed) morning if you want. And any advice on additional debugging I can turn on to help would be accepted too). --==_Exmh_1303863471_6090P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Exmh version 2.5 07/13/2001 iD8DBQFNt2CvcC3lWbTT17ARAlcDAKDG6bNRFGWc+GC2owPq50oKnIYp1gCgiciP C9+k9VSKRPB+RAA4ERQESU0= =o0x6 -----END PGP SIGNATURE----- --==_Exmh_1303863471_6090P--