Re: [2.4.20][2.5.60] /proc/interrupts comparsion - two irqs for i8042?

From: Randy.Dunlap (rddunlap@osdl.org)
Date: Wed Feb 12 2003 - 12:19:16 EST


(see an answer at bottom)

On Wed, 12 Feb 2003 11:12:02 -0500 (EST)
Shawn Starr <spstarr@sh0n.net> wrote:

|
| Right, but this wasn't a problem in 2.4? I had a PS/2 mouse before in 2.4
| and this didnt have the problem.
|
|
| On Wed, 12 Feb 2003, Brian Gerst wrote:
|
| > Shawn Starr wrote:
| > > 2.4:
| > > CPU0
| > > 0: 2576292 XT-PIC timer
| > > 1: 661 XT-PIC keyboard
| > > 2: 0 XT-PIC cascade
| > > 3: 10 XT-PIC serial
| > > 5: 1104824 XT-PIC soundblaster
| > > 8: 1 XT-PIC rtc
| > > 9: 0 XT-PIC acpi
| > > 10: 7 XT-PIC aic7xxx
| > > 11: 15167 XT-PIC usb-uhci, eth0
| > > 14: 7554 XT-PIC ide0
| > > 15: 3 XT-PIC ide1
| > >
| > > 2.5:
| > >
| > > CPU0
| > > 0: 36281 XT-PIC timer
| > > 1: 15 XT-PIC i8042
| > > 2: 0 XT-PIC cascade
| > > 3: 149 XT-PIC serial
| > > 5: 0 XT-PIC soundblaster
| > > 8: 1 XT-PIC rtc
| > > 9: 0 XT-PIC acpi
| > > 10: 20 XT-PIC aic7xxx
| > > 11: 324 XT-PIC uhci-hcd, eth0
| > > 12: 60 XT-PIC i8042 <--???
| > > 14: 723 XT-PIC ide0
| > > 15: 9 XT-PIC ide1
| > > NMI: 0
| > > LOC: 35547
| > > ERR: 0
| > > MIS: 0
| > >
| > > Interesting, why are we using two interrupts for the i8042 (keyboard).
| >
| > IRQ12 is for the PS/2 mouse port.
| >
| > --
| > Brian Gerst

Do you have a PS/2 mouse enabled/configured in 2.4?
I do, and it shows this on 2.4.20:

  0: 78505022 XT-PIC timer
  1: 305438 XT-PIC keyboard
  2: 0 XT-PIC cascade
  3: 2013477 XT-PIC xirc2ps_cs
  5: 0 XT-PIC usb-uhci
  8: 1 XT-PIC rtc
 10: 4 XT-PIC i82365
 11: 2188569 XT-PIC i82365, cs46xx
 12: 1555382 XT-PIC PS/2 Mouse
 14: 872963 XT-PIC ide0
 15: 3 XT-PIC ide1

and the driver code certainly requests IRQ 12 for the PS/2 mouse
when it's configured.

--
~Randy
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