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Date: Fri, 13 May 2005 15:06:26 -0600 (MDT)
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To: kirk@strauser.com
From: "M. Warner Losh" <imp@bsdimp.com>
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cc: freebsd-stable@freebsd.org
Subject: Re: wi0 is always status: no carrier
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In message: <200505122236.14490.kirk@strauser.com>
            Kirk Strauser <kirk@strauser.com> writes:
: I've finally coerced FreeBSD 5.4 to see my PCMCIA WLAN card (with many thanks 
: to Warner), but it always reports "status: no carrier".  I'm attempting to 
: connect to an open WAP that broadcasts it's SSID, so my understanding is that 
: it should be as simple as "ifconfig wi0 ad.dr.es.s netmask 255.255.255.0" or 
: "dhclient wi0", but neither of those work.  If I do manually specify an 
: address, then I can ping that address, but I'm not sure if that actually 
: means anything.
: 
: I've also been running tcpdump on the DHCP server for that wireless network.  
: I can see plenty of traffic from the other machines, but absolutely nothing 
: from the laptop.
: 
: My /boot/loader.conf looks like:
: 
:     hint.acpi.0.disabled="1"
:     hint.apic.0.disabled="1"
:     hw.cbb.start_memory=0xd800
: 
: Is there something else I'm blatantly missing?

Kirk's dmesg showed some interesting IRQ routing issues that might be
the problem:

pir0: <PCI Interrupt Routing Table: 4 Entries> on motherboard
$PIR: BIOS IRQ 11 for 0.7.INTA is not valid for link 0x22
$PIR: BIOS IRQ 11 for 0.7.INTB is not valid for link 0x22

Can you send me the output of http://people.freebsd.org/~msmith/pir.c
to make sure that's not the problem.

What does vmstat show for irq 10?  How about other IRQs?

Warner