The same bug affects me (regression on upgrade from lucid to maverick),
with the same driver (bcmwl-kernel-source).
I note for the reporter (assuming the problem is actually identical)
that right-clicking on the wireless taskbar logo and ticking "Enable
Wireless" successfully brings the device back up, and a short while
afterwards a wireless connection is successfully made (and stays up).
system: Lenovo Ideapad S12N
lspci reports: 07:00.0 Network controller: Broadcom Corporation BCM4312
802.11b/g LP-PHY (rev 01)
lsmod reports: wl 1959533 0
lshw reports:
*-network
description: Wireless interface
product: BCM4312 802.11b/g LP-PHY
vendor: Broadcom Corporation
physical id: 0
bus info: p...@0000:07:00.0
logical name: eth2
version: 01
serial: 00:26:82:32:35:77
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical
wireless
configuration: broadcast=yes driver=wl0 driverversion=5.60.48.36
ip=192.168.1.5 latency=0 multicast=yes wireless=IEEE 802.11bg
resources: irq:19 memory:c2200000-c2203fff
On boot, lshw reports the same, except this entry starts " *-network DISABLED".
On boot, lsmod reports that wl is already loaded as above.
--
Wireless is disabled on boot
https://bugs.launchpad.net/bugs/631735
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