Ubuntu 12.04.1 wireless problem

hello, i just updated my system to Ubuntu 12.04.1 from 10.04.1. my major problem is no Wireless connections. 10.04.1 worked fine. each time Fn+F2 was hit the wireless light and wireless connections would toggle on and off. now in 12.04.1 Fn+F2 does not toggle wireless. i know my wireless modem is working as i have another wireless application.
i have read problems relation to the wireless driver.

BroadCom STA wireless driver is activated and in use.

there are problems written about wireless drivers not sure if they apply??

following is info requested for wireless problems: thanks for your help ken

1. Machine Dell Inspiron 1501 Laptop


2. ken@ken-Inspiron-1501:~$ lspci -nn | grep -i bcm
05:00.0 Network controller [0280]: Broadcom Corporation BCM4311 802.11b/g WLAN [14e4:4311] (rev 01)
08:00.0 Ethernet controller [0200]: Broadcom Corporation BCM4401-B0 100Base-TX [14e4:170c] (rev 02)
ken@ken-Inspiron-1501:~$

3. ken@ken-Inspiron-1501:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:1c:23:ac:b1:cc
inet addr:192.168.0.10 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::21c:23ff:feac:b1cc/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2818 errors:0 dropped:0 overruns:0 frame:0
TX packets:2228 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3228883 (3.2 MB) TX bytes:281044 (281.0 KB)
Interrupt:21

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:245 errors:0 dropped:0 overruns:0 frame:0
TX packets:245 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:20608 (20.6 KB) TX bytes:20608 (20.6 KB)

4. ken@ken-Inspiron-1501:~$ lsmod
Module Size Used by
usblp 17885 0
usb_storage 39646 0
uas 17828 0
rfcomm 38139 0
bnep 17830 2
bluetooth 158438 10 rfcomm,bnep
parport_pc 32114 0
ppdev 12849 0
vesafb 13516 1
b44 31364 0
ssb 50691 1 b44
dell_wmi 12601 0
sparse_keymap 13658 1 dell_wmi
wl 2646601 0
snd_hda_codec_idt 60251 1
dell_laptop 17767 0
dcdbas 14098 1 dell_laptop
snd_hda_intel 32765 3
snd_hda_codec 109562 2 snd_hda_codec_idt,snd_hda_intel
snd_hwdep 13276 1 snd_hda_codec
snd_pcm 80845 2 snd_hda_intel,snd_hda_codec
snd_seq_midi 13132 0
snd_rawmidi 25424 1 snd_seq_midi
snd_seq_midi_event 14475 1 snd_seq_midi
snd_seq 51567 2 snd_seq_midi,snd_seq_midi_event
snd_timer 28931 2 snd_pcm,snd_seq
snd_seq_device 14172 3 snd_seq_midi,snd_rawmidi,snd_seq
snd 62064 15 snd_hda_codec_idt,snd_hda_intel,snd_hda_codec,snd_ hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_se q_device
radeon 737789 1
psmouse 72919 0
sp5100_tco 13495 0
soundcore 14635 1 snd
serio_raw 13027 0
k8temp 12905 0
joydev 17393 0
i2c_piix4 13093 0
snd_page_alloc 14108 2 snd_hda_intel,snd_pcm
lib80211 14040 1 wl
ttm 65344 1 radeon
drm_kms_helper 45466 1 radeon
drm 197692 4 radeon,ttm,drm_kms_helper
i2c_algo_bit 13199 1 radeon
shpchp 32325 0
ati_agp 13242 0
wmi 18744 1 dell_wmi
lp 17455 0
video 19068 0
parport 40930 3 parport_pc,ppdev,lp
mac_hid 13077 0
sdhci_pci 18324 0
sdhci 28241 1 sdhci_pci
pata_atiixp 12999 0
usbhid 41906 0
hid 77367 1 usbhid
ken@ken-Inspiron-1501:~$


5. lots of msgs need to narrow down

6. ken@ken-Inspiron-1501:~$ sudo lshw -C network
[sudo] password for ken:
PCI (sysfs)


7. ken@ken-Inspiron-1501:~$ iwlist scan
lo Interface doesn't support scanning.

eth0 Interface doesn't support scanning.


8. ken@ken-Inspiron-1501:~$ lsb_release -d
Description: Ubuntu 12.04.1 LTS


9. ken@ken-Inspiron-1501:~$ uname -mr
3.2.0-29-generic-pae i686


10. ken@ken-Inspiron-1501:~$ sudo /etc/init.d/networking restart
* Running /etc/init.d/networking restart is deprecated because it may not enable again some interfaces
* Reconfiguring network interfaces... WARNING: ifup -a is disabled in favour of NetworkManager.
Set ifupdown:managed=false in /etc/NetworkManager/NetworkManager.conf.
**** I had set managed to true as i did in 10.04.1 and wireless worked fine.
[ OK ]

Please check here. Notice your device is the same: 14e4:4311.

Quote:

---

Broadcom Corporation BCM4311 802.11b/g WLAN [14e4:4311]

---

The fix is the same.

http://ubuntuforums.org/showthread.php?t=1997880

i applied the correction and it did fix my wireless problem..
many thanks ken

Glad it's working. Please use thread tools at the top to mark Solved. The searchers will appreciate it.