Today, after leaving my Lenovo T61 on overnight to do some compiles, I
lost my wireless. I tried a few other things that what I've listed
below, but none of it worked. This is a dual boot machine - I also run
Windows XP, and don't have any issues with wireless on that OS. Any
clues would be appreciated.

# uname -a
FreeBSD grimsqueaker.pigfarm.org 7.2-RELEASE FreeBSD 7.2-RELEASE #0:
Fri May  1 07:18:07 UTC 2009
r...@driscoll.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  amd64

First, in /var/log/messages, I found the following:

Sep 13 15:09:23 grimsqueaker kernel: wpi0: device timeout
Sep 13 15:09:23 grimsqueaker kernel: wpi0: link state changed to DOWN
Sep 13 15:09:24 grimsqueaker kernel: wpi0: could not set power mode
Sep 13 15:09:24 grimsqueaker kernel: wpi0: device config failed

So I tried stopping and starting netif:

# /etc/rc.d/netif stop
Stopping network:wpa_supplicant not running? (check
/var/run/wpa_supplicant/wpi0.pid).
 lo0 em0 wpi0 fwe0 fwip0.
# /etc/rc.d/netif start
em0: no link .............. giving up
Starting wpa_supplicant.
wpi0: no link .............. giving up
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x5
        inet6 ::1 prefixlen 128
        inet 127.0.0.1 netmask 0xff000000
em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=19b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4>
        ether 00:1c:25:80:db:87
        media: Ethernet autoselect
        status: no carrier
wpi0: flags=8803<UP,BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
        ether 00:1f:3c:4d:e2:55
        media: IEEE 802.11 Wireless Ethernet autoselect (autoselect)
        status: no carrier
        ssid "" channel 11 (2462 Mhz 11g)
        authmode WPA1+WPA2/802.11i privacy ON deftxkey UNDEF txpower 50
        bmiss 7 scanvalid 60 protmode CTS roaming MANUAL


Then, I let the compile get as far as it could, and rebooted. While
rebooting, I noticed this on the console, and found these traces in
/var/log/messages:

Sep 13 16:05:44 grimsqueaker kernel: interrupt storm detected on
"irq16:"; throttling interrupt source
Sep 13 16:05:48 grimsqueaker last message repeated 4 times
Sep 13 16:05:49 grimsqueaker syslogd: exiting on signal 15
Sep 13 16:07:38 grimsqueaker syslogd: kernel boot file is /boot/kernel/kernel
Sep 13 16:07:38 grimsqueaker kernel: interrupt storm detected on
"irq16:"; throttling interrupt source
Sep 13 16:07:38 grimsqueaker kernel: interrupt storm detected on
"irq16:"; throttling interrupt source
Sep 13 16:07:38 grimsqueaker kernel: Waiting (max 60 seconds) for
system process `vnlru' to stop...done
Sep 13 16:07:38 grimsqueaker kernel: Waiting (max 60 seconds) for
system process `bufdaemon' to stop...interrupt storm detected on
"irq16:"; throttling interrupt source
Sep 13 16:07:38 grimsqueaker kernel: done
Sep 13 16:07:38 grimsqueaker kernel: Waiting (max 60 seconds) for
system process `syncer' to stop...interrupt storm detected on
"irq16:"; throttling interrupt source
Sep 13 16:07:38 grimsqueaker kernel:
Sep 13 16:07:38 grimsqueaker kernel: Syncing disks, vnodes
remaining...0 interrupt storm detected on "irq16:"; throttling
interrupt source
Sep 13 16:07:38 grimsqueaker kernel: 0 done
Sep 13 16:07:38 grimsqueaker kernel: All buffers synced.
Sep 13 16:07:38 grimsqueaker kernel: Uptime: 6h53m12s
Sep 13 16:07:38 grimsqueaker kernel: interrupt storm detected on
"irq16:"; throttling interrupt source


Thanks,

Kurt
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