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Subject: kern/1690: apm and SB 16 conflict inappropriately.
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>Number:         1690
>Category:       kern
>Synopsis:       apm and sbxvi inappropriately probe as conflicting
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Sep 29 11:10:01 PDT 1996
>Last-Modified:
>Originator:     Nick Sayer
>Organization:
just me
>Release:        FreeBSD 2.2-960801-SNAP i386
>Environment:

controller      snd0
device          sb0     at isa? port 0x220 irq 5 drq 1 vector sbintr
device          sbxvi0  at isa? drq 5
device          sbmidi0 at isa? port 0x330
device          opl0    at isa? port 0x388

device          apm0    at isa?

>Description:

The code that detects conflicting driver configs complains needlessly
about config items that are "don't care".

>How-To-Repeat:

boot a kernel containing the above config.

apm0 will not be probed. It will be reported as conflicting with
sbxvi0.

>Fix:
	
The problem is that both apm0 and sbxvi0 end up with I/O address 0.
This doesn't matter, since neither uses the I/O address portion.

A workaround is to add 'conflicts' to the apm0 line, but a better fix
would be for the conflict detection code not to care about items which
appear to conflict but are 0.

>Audit-Trail:
>Unformatted: