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Message-ID: <20080402134351.ZZRA012@mailhub.coreip.homeip.net> Date: Wed, 2 Apr 2008 13:44:56 -0400 From: Dmitry Torokhov <dmitry.torokhov@...il.com> To: Balaji Rao <balajirrao@...il.com> Cc: Yanko Kaneti <yaneti@...lera.com>, linux-input@...r.kernel.org, linux-kernel@...r.kernel.org, mingo@...e.hu, Thomas Gleixner <tglx@...utronix.de> Subject: Re: 2.6.25-rc5.git4 regression PS/2 mouse not detected/working 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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