From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitry Torokhov Subject: Re: 2.6.25-rc5.git4 regression PS/2 mouse not detected/working Date: Wed, 2 Apr 2008 13:44:56 -0400 Message-ID: <20080402134351.ZZRA012@mailhub.coreip.homeip.net> References: <1205775229.25146.11.camel@indigo.declera.com> <200804022038.33245.balajirrao@gmail.com> <20080402113043.ZZRA012@mailhub.coreip.homeip.net> <200804022300.14164.balajirrao@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from py-out-1112.google.com ([64.233.166.176]:10557 "EHLO py-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756593AbYDBRpC (ORCPT ); Wed, 2 Apr 2008 13:45:02 -0400 Received: by py-out-1112.google.com with SMTP id u52so3906236pyb.10 for ; Wed, 02 Apr 2008 10:45:01 -0700 (PDT) Content-Disposition: inline In-Reply-To: <200804022300.14164.balajirrao@gmail.com> Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Balaji Rao Cc: Yanko Kaneti , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, mingo@elte.hu, Thomas Gleixner On Wed, Apr 02, 2008 at 11:00:13PM +0530, Balaji Rao wrote: > On Wednesday 02 April 2008 09:03:28 pm Dmitry Torokhov wrote: > > Hi Blaji, > > > > On Wed, Apr 02, 2008 at 08:38:33PM +0530, Balaji Rao wrote: > > > > > > Coincidentally even I hit upon this bug a couple of days ago after enabling > > > HPET in my BIOS. A quick check told me that IRQ 12 which the patch assigns to > > > the HPET device is used by the PS/2 mouse as well. This makes the mouse > > > inactive. > > > > > > I am working on this.. I am not sure if the PS/2 code is misbehaving though.. > > > > > > > Normally IRQ12 can not be shared on X86 if PS/2 mouse is present. > > If PCI side tries to grab the IRQ then ISA (legacy) side will never > > see its interrupts coming. > > > OK. So, I need to specifically check for IRQ12 being assigned and avoid it ? > Yeah.. I think there are other legacy IRQs that should be avoided as well. I am pretty sure Ingo would have a better idea which they are. -- Dmitry