From nobody  Sat Aug 16 23:45:54 1997
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Date: Sat, 16 Aug 1997 23:45:54 -0700 (PDT)
From: stevedav@netcom.com
To: freebsd-gnats-submit@freebsd.org
Subject: sio0 and sio1 serial ports fail to probe
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>Number:         4315
>Category:       i386
>Synopsis:       sio0 and sio1 serial ports fail to probe
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Aug 16 23:50:00 PDT 1997
>Closed-Date:    Tue Jun 16 15:09:36 MEST 1998
>Last-Modified:  Tue Jun 16 15:10:53 MEST 1998
>Originator:     Steve Davidson
>Release:        2.2.2 (as distributed from Walnut Creek CDROM)
>Organization:
>Environment:
FreeBSD monarch 2.2.2-RELEASE FreeBSD 2.2.2-RELEASE #0: Fri Aug 15 23:36:22 PDT 1997     root@monarch:/usr/src/sys/compile/MONARCH_01  i386
>Description:
Serial ports fail to probe on boot-up.  The output from 'dmesg':
sio0 not found at 0x3f8
sio1 not found at 0x2f8
The mainboard is a Iwill P55XB2 with Award BIOS v4.51PG.
The serial ports are at the common locations in the BIOS: 3f8/irq4 and 2f8/irq3
Both ports work correctly from MS-DOS 6.22.  Disabling the on-board serial ports and using a serial I/O card produces the same results.
>How-To-Repeat:
Simply boot the system and read the probe data.
>Fix:
Use an OS other than FreeBSD (i.e. DOS).
Purchase a different motherboard and pray that it fixes the problem.
>Release-Note:
>Audit-Trail:
State-Changed-From-To: open->closed 
State-Changed-By: phk 
State-Changed-When: Thu Sep 18 23:22:22 PDT 1997 
State-Changed-Why:  

Not much we can do. 

Try boot -cv 
then set flags to 0x80 on the two sio ports.  This will give more verbose 
information.  Then check the sources and see what you find. 

Alternatively, you may have a PnP challenged motherboard, is there a 
BIOS setting for  "PnP OS" / "MSDOS" or similar ?  if so set it to MSDOS. 
State-Changed-From-To: closed->open 
State-Changed-By: bde 
State-Changed-When: Tue Jun 16 15:06:34 MEST 1998 
State-Changed-Why:  
Was closed prematurely. 
State-Changed-From-To: open->closed 
State-Changed-By: bde 
State-Changed-When: Tue Jun 16 15:09:36 MEST 1998 
State-Changed-Why:  
Superseded by kern/6201. 
Believed to be fixed on 1998/06/16. 
>Unformatted:
