No wireless: ubuntu 12.10/ chip bcm4311

Hi ,
please open a terminal (CTRL+ALT+T) and try the commands below . Execute them one by one. (copy-paste from here for more accuracy)

sudo modprobe -r b43 ssb wl
sudo apt-get remove bcmwl-kernel-source
sudo apt-get install build-essential dkms linux-headers-generic
sudo apt-get install bcmwl-kernel-source

reboot your PC and see if Wireless works now..

Thanks

First, run the following
lspci -nn |fgrep 280
and look for the pci-id of the form [14e4:4311 (or 4312), if its 4313, that's a problem.
4311 and 4312 are well supported by the b43 driver, which should run by simply adding its firmware. (Which you apparently have already done with the installation of the b43-fwcutter package and the firmware-b43-installer). Check that you have files in directory /lib/firmware/b43
ls /lib/firmware/b43
Undo the blacklist modification you mentioned above. You do NOT want the bcm43xx, so it SHOULD be blacklisted.
Good luck if you want to try the wl driver, bug 732677 is still a problem for the 4311 as far as I know.

I've tried this:
sudo modprobe -r b43 ssb wl
sudo apt-get remove bcmwl-kernel-source
sudo apt-get install build-essential dkms linux-headers-generic
sudo apt-get install bcmwl-kernel-source
Now the wireless icon is completly gone.
Here is the output:
 sudo modprobe -r b43 ssb wl
[sudo] password for snufff:
WARNING: All config files need .conf: /etc/modprobe.d/blacklist, it will be ignored in a future release.
FATAL: Module ssb is in use.
snufff@snufff-TravelMate-5520:~$
snufff@snufff-TravelMate-5520:~$ sudo apt-get remove bcmwl-kernel-source
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package 'bcmwl-kernel-source' is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
snufff@snufff-TravelMate-5520:~$ sudo apt-get install build-essential dkms linux-headers-generic
Reading package lists... Done
Building dependency tree
Reading state information... Done
build-essential is already the newest version.
linux-headers-generic is already the newest version.
Suggested packages:
  debhelper
The following NEW packages will be installed:
  dkms
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 71.4 kB of archives.
After this operation, 348 kB of additional disk space will be used.
Do you want to continue [Y/n]? Y
Get:1 http://bg.archive.ubuntu.com/ubuntu/ quantal-updates/main dkms all 2.2.0.3-1.1ubuntu1.1 [71.4 kB]
Fetched 71.4 kB in 0s (159 kB/s)
Selecting previously unselected package dkms.
(Reading database ... 185220 files and directories currently installed.)
Unpacking dkms (from .../dkms_2.2.0.3-1.1ubuntu1.1_all.deb) ...
Processing triggers for man-db ...
Setting up dkms (2.2.0.3-1.1ubuntu1.1) ...
snufff@snufff-TravelMate-5520:~$ sudo apt-get install bcmwl-kernel-source
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
  bcmwl-kernel-source
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/1,150 kB of archives.
After this operation, 3,120 kB of additional disk space will be used.
Selecting previously unselected package bcmwl-kernel-source.
(Reading database ... 185246 files and directories currently installed.)
Unpacking bcmwl-kernel-source (from .../bcmwl-kernel-source_5.100.82.112+bdcom-0ubuntu3_i386.deb) ...
Setting up bcmwl-kernel-source (5.100.82.112+bdcom-0ubuntu3) ...
Loading new bcmwl-5.100.82.112+bdcom DKMS files...
First Installation: checking all kernels...
Building only for 3.5.0-23-generic
Building for architecture i686
Building initial module for 3.5.0-23-generic
Done.

wl:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.5.0-23-generic/updates/dkms/

depmod..........

DKMS: install completed.
ERROR: Module b43 does not exist in /proc/modules
ERROR: Module b43legacy does not exist in /proc/modules
ERROR: Module ssb is in use by ssb_hcd
ERROR: Module bcm43xx does not exist in /proc/modules
ERROR: Module brcm80211 does not exist in /proc/modules
ERROR: Module brcmfmac does not exist in /proc/modules
ERROR: Module brcmsmac does not exist in /proc/modules
ERROR: Module bcma does not exist in /proc/modules
WARNING: All config files need .conf: /etc/modprobe.d/blacklist, it will be ignored in a future release.
update-initramfs: deferring update (trigger activated)
Processing triggers for initramfs-tools ...
update-initramfs: Generating /boot/initrd.img-3.5.0-23-generic
snufff@snufff-TravelMate-5520:~$

A lot of errors received. Any ideas?

P.S. I think I've blacklisted the bcm43xx.
And I have files in this directory.
Do you think moving to v.10.10 will help? or The ndiswrapper will help?
Thanks again!

You don't need ndiswrapper, there is a native driver.....

Have you tried this guide:
https://help.ubuntu.com/community/WifiDocs/Driver/bcm43xx

Mine is [14e4:4311], I moved to 10.10 and I have no problems now. I use it only for studying PHP and Python on Linux, so it's fine for now. Later on I'll try again the 12.04.
Thank you all !!!

Thanks Ubfan, that solved my question.

Maverick is EOL, you will get zero updates and zero support from the community.
Thanks