LinuxFloat

I have the same wireless network card; i.e. "Broadcom Corporation BCM4311" (possibly your model may be different, which can be determined by "lspci -vvnn | grep 14e4" command in the terminal), and the same problem (no wireless connection, even I cannot see the list of wireless networks) after the 11.04 upgrade.

My problem is solved after removing "bcmwl-kernel-source" by using Synaptic Package Manager, then installing "firmware-b43-installer" and "b43-fwcutter" again by Synaptic Package Manager. After a restart, my wireless network connection works. I hope it solves your problem, too.

hey guys!! i installed ubuntu 11.04 and i had the same problem with the wireless card, my card is different from yours though. i just ran this command and there my wireless was ON.

rfkill unblock wifi

you can run rfkill to see the options first.

I found that one needs to delete the built in driver from the addtional drivers GUI. Can be found in unity by typing driver

I friends if you have problems with cards broadcom, please see my posts, I modified a driver work 100% guaranteed for ubuntu 11.04 and other distro::

http://kuboosoft.blogspot.com/2011/06/solucion-drivers-broadcom-ubuntu-1...

http://www.taringa.net/posts/linux/11328286/solucion-a-drivers-broadcom-...

good day linuxfloat.org admin discovered your website via yahoo but it was hard to find and I see you could have more visitors because there are not so many comments yet. I have found website which offer to dramatically increase traffic to your site http://xrumerservice.org they claim they managed to get close to 1000 visitors/day using their services you could also get lot more targeted traffic from search engines as you have now. I used their services and got significantly more visitors to my site. Hope this helps :) They offer best backlinks Take care. Jason

I removed the bcmwl-kernel-source pkg fine, but when I go to install the "firmware-b43-installer" I get errors and it says some portions of the pkg failed to install correctly...

any advice?

I'm pretty sure I have the same problem, however I can't remove the bcmwl-kernel-source. Anybody has a clue? Thanks in advance

Removing bcmwl-kernel-source ...
Removing all DKMS Modules

Error! There are no instances of module: bcmwl
5.100.82.38+bdcom located in the DKMS tree.
dpkg: error processing bcmwl-kernel-source (--remove):
subprocess installed pre-removal script returned error exit status 3
Errors were encountered while processing:
bcmwl-kernel-source
E: Sub-process /usr/bin/dpkg returned an error code (1)

Uninstall bcmwl-kernel-source and install the drivers from Broadcom site. It works flawless for Broadcom adapters...

Source: http://computerandu.wordpress.com/2011/05/04/how-to-solve-no-wireless-ne...

thank you!!!!!!!!!!!!!!!!!!!!

Thanks! You saved my butt big time!

Thank you, thank you!! This worked for me too!

^^ that worked for me like a charm as well.