From nobody@FreeBSD.org  Fri Apr 20 16:26:04 2007
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Date: Fri, 20 Apr 2007 16:21:03 GMT
From: Stefan Lambrev<stefa.lambrev@sun-fish.com>
To: freebsd-gnats-submit@FreeBSD.org
Subject: sio0: port may not be enabled
X-Send-Pr-Version: www-3.0

>Number:         111958
>Category:       kern
>Synopsis:       sio0: port may not be enabled
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Apr 20 16:30:03 GMT 2007
>Closed-Date:    Fri Apr 20 17:37:08 GMT 2007
>Last-Modified:  Fri Apr 20 17:37:08 GMT 2007
>Originator:     Stefan Lambrev
>Release:        FreeBSD 6.2-STABLE
>Organization:
>Environment:
FreeBSD hater.cmotd.com 6.2-STABLE FreeBSD 6.2-STABLE #4: Mon Mar 12 16:39:25 EET 2007     root@hater.cmotd.com:/usr/obj/usr/src/sys/CORE64-SMP  amd64
>Description:
Serial port does not work :

from dmesg:
sio0: configured irq 4 not in bitmap of probed irqs 0
sio0: port may not be enabled
sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
sio0: type 16550A

I thought it can be a problem because of shared IRQs .. but vmstat -i shows this:

% vmstat -i
interrupt                          total       rate
irq4: sio0                             7          0
irq15: ata1                           69          0
irq20: atapci0                      3783         15
irq21: uhci0 uhci*                     2          0
cpu0: timer                       491698       1990
Total                             495559       2006

from /boot/device.hints :
hint.sio.0.at="isa"
hint.sio.0.port="0x3F8"
hint.sio.0.flags="0x10"
hint.sio.0.irq="4"

I checked my BIOS - both irq 3&4 are reserved for ISA,
and com port 1 is setup to use irq4 port 3F8. 
>How-To-Repeat:
Install freebsd on HP compaq nw8440, or Asus A8N motherboard.
>Fix:

>Release-Note:
>Audit-Trail:
State-Changed-From-To: open->closed 
State-Changed-By: remko 
State-Changed-When: Fri Apr 20 17:36:55 UTC 2007 
State-Changed-Why:  
Hello, first of all thanks for using FreeBSD and taking the time to 
report this issue. Sadly this is not a problem, but a question. I will 
also tell you why: This is a "FAQ" type of question, it is a warning 
from the system to tell you that it might or might not work. In this 
case I expect that this will normally work since FreebSD can share IRQ's 
between devices. Please test this out and report on questions@ when it 
fails to determine whether the ticket should be reopened or not (in that 
case please contact me so that we can arrange that together). Beyond 
that discussing this on the mailinglist will much likely to get your 
issue resolved even faster. Again thanks! 

http://www.freebsd.org/cgi/query-pr.cgi?pr=111958 
>Unformatted:
