lenovo b560/ubuntu11.04/no wifi: wifi switch won't react to rfkill

[silvia_g]

hey! i'm an absolute beginner in ubuntu; i've recently bought a lenovo b560 (x64) with windows 7 installed, and i'm currently trying to get ubuntu 11.04 working so that i can erase windows for good; i have a dual boot with the two OSs.
the thing is that on ubuntu i can't connect to my wireless network (on windows works fine); i've got the "sticky" broadcom 4313 card, but i don't think that's the problem (you'll tell me, I hope); there's a physical switch with the LED on, but the network manager acts as if it was off ("wifi disconnected by switch); i've tried "rfkill unblock all" but it's "hard blocked" and won't unblock.. on top of that the system crashed a few times already, just freezed and i had to turn it off because nothing else worked..
please help me, i was using ubuntu on my previous PC, really happy of being away from windows, and I don't want to go back..:P
I've added some of the things recommended in the newbies how to post, but if there's anything else you need just please tell me how to get it and i'll post it, ok?
thank you in advance,
silvia

rfkill list all
0: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
1: ideapad_bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
3: brcmwl-0: Wireless LAN
Soft blocked: no
Hard blocked: yes
4: hci0: Bluetooth
Soft blocked: no
Hard blocked: no


~$ sudo lshw -c network
*-network
description: Ethernet interface (...)
*-network
description: Wireless interface
product: BCM4313 802.11b/g/n Wireless LAN Controller
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:04:00.0
logical name: eth1
version: 01
serial: ac:81:12:0c:a9:56
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=wl0 driverversion=5.100.82.38 latency=0 multicast=yes wireless=IEEE 802.11
resources: irq:17 memory:f2500000-f2503fff

lspci -nn
03:00.0 Ethernet controller [0200]: Atheros Communications AR8131 Gigabit Ethernet [1969:1063] (rev c0)
04:00.0 Network controller [0280]: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller [14e4:4727] (rev 01)

ifconfig
eth0 Link encap:Ethernet direcciónHW f0:de:f1:27:40:d3
Direc. inet:192.168.1.35 Difus.:192.168.1.255 Másc:255.255.255.0
Dirección inet6: fe80::f2de:f1ff:fe27:40d3/64 Alcance:Enlace
ACTIVO DIFUSIÓN FUNCIONANDO MULTICAST MTU:1500 Métrica:1
Paquetes RX:1081787 errores:0 perdidos:0 overruns:0 frame:0
Paquetes TX:9296 errores:0 perdidos:0 overruns:0 carrier:2
colisiones:0 long.colaTX:1000
Bytes RX:9324651 (9.3 MB) TX bytes:1513335 (1.5 MB)
Interrupción:44

eth1 Link encap:Ethernet direcciónHW ac:81:12:0c:a9:56
Dirección inet6: fe80::ae81:12ff:fe0c:a956/64 Alcance:Enlace
ACTIVO DIFUSIÓN FUNCIONANDO MULTICAST MTU:1500 Métrica:1
Paquetes RX:0 errores:0 perdidos:0 overruns:0 frame:0
Paquetes TX:0 errores:0 perdidos:0 overruns:0 carrier:0
colisiones:0 long.colaTX:1000
Bytes RX:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupción:17

lo Link encap:Bucle local
Direc. inet:127.0.0.1 Másc:255.0.0.0
Dirección inet6: ::1/128 Alcance:Anfitrión
ACTIVO BUCLE FUNCIONANDO MTU:16436 Métrica:1
Paquetes RX:12 errores:0 perdidos:0 overruns:0 frame:0
Paquetes TX:12 errores:0 perdidos:0 overruns:0 carrier:0
colisiones:0 long.colaTX:0
Bytes RX:720 (720.0 B) TX bytes:720 (720.0 B)

iwconfig
lo no wireless extensions.

eth0 no wireless extensions.

eth1 IEEE 802.11 Access Point: Not-Associated
Link Quality:5 Signal level:0 Noise level:0
Rx invalid nwid:0 invalid crypt:0 invalid misc:0

uname -mr (kernel module)
2.6.38-8-generic x86_64

[stefanmuc2k]

I have one of these machines as well.

For me it worked once I appended the line

blacklist acer_wmi
to /etc/modprobe.d/blacklist.conf

It seems the proprietary broadcom driver doesn't play nicely with the acer_wmi module.

[chili555]

rfkill list all
0: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
1: ideapad_bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
3: brcmwl-0: Wireless LAN
Soft blocked: no
Hard blocked: yes
4: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
I don't see acer here; I don't think blacklisting acer-wmi is going to help.

[chili555]

Let's have a look at:
lsmodThanks.