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Date:      Mon, 23 Oct 2000 14:25:51 +0400 (MSK)
From:      Grigory Kljuchnikov <grn@ispras.ru>
To:        Dave Uhring <duhring@charter.net>
Cc:        freebsd-stable@FreeBSD.ORG
Subject:   Re: Kernel message: stray irq 7
Message-ID:  <Pine.GSO.4.20.0010231336130.21350-100000@gate.ispras.ru>
In-Reply-To: <00101815543200.20636@dave>

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Hello,

I've solved this problem. I've installed an additional isa
multi adapter (with 2 COM ports, 1 Parallel, 1 floppy, 1 HDD) 
and disabled onboard COMs and Parallel ports on my box. 
The kernel message (stray irq 7) don't appear in the system 
and I have both RS232 (the modem and the mouse works fine).
I suppose my onboard COMs and Parallel ports are dead.
But it's very bad diagnostic message - "stray irq 7" - for
this trouble that appeared even when I disabled onboard
COMs and Parallel ports in BIOS, but didn't install multi 
adapter. I even removed all drivers for COMs and parallel
ports from the kernel, but this message wasn't lost.

I understand this is a hardware problem, but this message
appear not only on my box. The friend of mine said my
that he see same kernel message on his home box every day
but it don't affect on his work and his COMs ports work fine. 

Does anyone have any comments? 


Best regards,
Grigory Klyuchnikov
------------------------------------------------------------
Institute for System Programming Russian Academy of Sciences,
109004, Moscow, Russia, B.Kommunistitcheskay, 25,
  phone(work):   +7-095-9125659
  fax:           +7-095-9121524
  e-mail:        <grn@ispras.ru>

On Wed, 18 Oct 2000, Dave Uhring wrote:

> On Wed, 18 Oct 2000, Grigory Kljuchnikov wrote:
> > Hello,
> > 
> > I've got kernel message:
> > 
> > /kernel: stray irq7
> > 
> > when I've tried to connect to modem on /dev/cuaa1 by kermit.
> > 
> > The part of dmesg is:
> > 
> > sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
> > sio1 at port 0x2f8-0x2ff irq 3 on isa0
> > ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0
> > 
> > I have got only modem connected to /dev/cuaa1, there isn't
> > a printer and a mouse. And I cannot connect to modem.
> > 
> > What is the matter?
> > 
> > Thanks.   
> > 
> > Best regards,
> > Grigory Klyuchnikov
> > ------------------------------------------------------------
> > Institute for System Programming Russian Academy of Sciences,
> > 109004, Moscow, Russia, B.Kommunistitcheskay, 25,
> >   phone(work):   +7-095-9125659
> >   fax:           +7-095-9121524
> >   e-mail:        <grn@ispras.ru>
> 
> I have the identical problem with OpenBSD on my router/firewall box. 
> The problem seems to be that a printer is NOT connected.  The
> 'acknowledge' pin on the interface is floating, thus is extremely
> susceptible to EMI.  Try either connecting a printer to the interface
> or dig up the Centronics interface data and tie the offending pin high
> or low as indicated.
> 
> Same problem occurs with IRQ 15 with no drives attached to the IDE
> secondary port.  These spurious IRQ's are merely an annoyance except on
> a router box, where they sometimes cause overruns on the NIC receive
> buffer.
> 
> Dave
> 




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