應該是因為Kernel升級了，所以請重新安裝"bcmwl-kernel-source".
sudo apt-get remove bcmwl-kernel-source;sudo apt-get install bcmwl-kernel-source
cat /var/log/cat jockey.log
2011-12-31 12:57:25,725 DEBUG: unbind/rebind on driver /sys/module/wl/drivers/pci:wl: device 0000:0c:00.0
2011-12-31 12:57:25,955 DEBUG: BroadcomWLHandler enabled(): kmod enabled, bcm43xx: blacklisted, b43: blacklisted, b43legacy: blacklisted
2011-12-31 12:57:26,133 DEBUG: BroadcomWLHandler enabled(): kmod enabled, bcm43xx: blacklisted, b43: blacklisted, b43legacy: blacklisted
2011-12-31 12:57:26,242 DEBUG: BroadcomWLHandler enabled(): kmod enabled, bcm43xx: blacklisted, b43: blacklisted, b43legacy: blacklisted
2011-12-31 12:57:26,421 DEBUG: BroadcomWLHandler enabled(): kmod enabled, bcm43xx: blacklisted, b43: blacklisted, b43legacy: blacklisted
2011-12-31 12:57:26,534 DEBUG: BroadcomWLHandler enabled(): kmod enabled, bcm43xx: blacklisted, b43: blacklisted, b43legacy: blacklisted
2011-12-31 12:57:26,712 DEBUG: BroadcomWLHandler enabled(): kmod enabled, bcm43xx: blacklisted, b43: blacklisted, b43legacy: blacklisted
2011-12-31 12:57:26,817 DEBUG: BroadcomWLHandler enabled(): kmod enabled, bcm43xx: blacklisted, b43: blacklisted, b43legacy: blacklisted
2011-12-31 12:57:26,994 DEBUG: BroadcomWLHandler enabled(): kmod enabled, bcm43xx: blacklisted, b43: blacklisted, b43legacy: blacklisted
2011-12-31 12:58:00,322 DEBUG: Shutting down
