Re: 2.6.25-rc5.git4 regression PS/2 mouse not detected/working

[Dmitry Torokhov]

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.

-- 
Dmitry
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