Broadcom BCM4311, Ubuntu 12.04 / 13.04

Thank You very very much. I was struggling for two days and then search resulted in your post!!! it works! thanks a lot once again

I cannot thank you enough for this, I nearly reinstalled my OS until I saw this.

I am jumping for joy!
:KS:KS:KS:KS:KS

Quote:

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Originally Posted by chili555

Please try this:

Code:

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sudo apt-get remove --purge bcmwl-kernel-source
sudo apt-get install linux-firmware-nonfree

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Reboot and let us have your report.

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I am new to Linux. Installed Ubuntu 12.04 on a Dell Latitude D430. After installing, I was suggested to wire connect the machine to get Internet, which I did, updated the system, and it works wired. Wireless is what's killing me.

In systems settings, under additional drivers, the driver for the machine is there and active.

I tried 2 two commands:
sudo apt-get remove --purge bcmwl-kernel-source sudo apt-get install linux-firmware-nonfree



Got the same terminal response as Josh Rabbit, rebooted, I still don't get signal at the hot spot.

One question though, Do I soppose to get a message saying "Networks Available"? like in Windows?

Quote:

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Originally Posted by chili555

Please try this:

Code:

---

sudo apt-get remove --purge bcmwl-kernel-source
sudo apt-get install linux-firmware-nonfree

---

Reboot and let us have your report.

---

New to Linux, installed Ubuntu 12.04 on a Latitude D430. Wired connection works, that is how I updated the system. wireless is whats killing me. the driver is there, in additional drivers and active. I tried this 2 commands, got the same results as Josh Rabbit, rebooted, still don't have signal at a hot spot. It should detect signal as in windows correct? What do I do next. Heeelp!

Quote:

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Originally Posted by rogersaavedra

New to Linux, installed Ubuntu 12.04 on a Latitude D430. Wired connection works, that is how I updated the system. wireless is whats killing me. the driver is there, in additional drivers and active. I tried this 2 commands, got the same results as Josh Rabbit, rebooted, still don't have signal at a hot spot. It should detect signal as in windows correct? What do I do next. Heeelp!

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Do you have the exact same device as the original poster?

Quote:

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

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Please check:

Code:

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lspci -nn | grep 0280

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Please post:

Code:

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rfkill list all

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@chili555

thank you.

@chili555

Thanks.

Quote:

---

Originally Posted by chili555

Please try this:

Code:

---

sudo apt-get remove --purge bcmwl-kernel-source
sudo apt-get install linux-firmware-nonfree

---

Reboot and let us have your report.

---

Thank you Chili you are the $h!t.. this works great in 12.10 fixed my wifi great!!

I added this to it and my internet is flying now I am getting 30Mbs/6Mbs over wifi:

Disables Ipv6:

Code:

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sudo gedit /etc/modprobe.d/bad_list

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Code:

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alias net-pf-10 off

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This adjusts TCP window size:

Code:

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sudo gedit /etc/sysctl.conf

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If you choose a windows packet size that is too big, you will notice slower broadband performance (524288 works for me). If you notice a slow down, then reduce your window size.
The largest size you can use is 65536, however these are the three settings that seem to work best:
524288
262144
131072
Which are all multiples of 1024 (or 1K).
Now add the following to the end of the file:

net.core.rmem_default = 524288
net.core.rmem_max = 524288
net.core.wmem_default = 524288
net.core.wmem_max = 524288
net.ipv4.tcp_wmem = 4096 87380 524288
net.ipv4.tcp_rmem = 4096 87380 524288
net.ipv4.tcp_mem = 524288 524288 524288
net.ipv4.tcp_rfc1337 = 1
net.ipv4.ip_no_pmtu_disc = 0
net.ipv4.tcp_sack = 1
net.ipv4.tcp_fack = 1
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_timestamps = 1
net.ipv4.tcp_ecn = 0
net.ipv4.route.flush = 1


Now save:)

After adding these line you do not need to reboot, instead just reset the file by issuing this command:

sudo sysctl -p

After completing this, you should notice improved web surfing speed. If not, remember to go back and adjust your TCP window size and try again.

Quote:

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sudo gedit /etc/modprobe.d/bad_list

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Everything in modprobe.d needs to be a conf file, so this will work better as:

Code:

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sudo gedit /etc/modprobe.d/bad_list.conf

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Thanks for your kind (??) comments.

i also have problems but on a inspirion 1545 and my rfkill list says
user@user-Inspiron-1545:~$ rfkill list all
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
1: dell-wifi: Wireless LAN
Soft blocked: yes
Hard blocked: yes

what do i do