Slow connection with Broadcom BCM43142 on Ubuntu 16.04

Question

I have recently switched to Ubuntu 16.04 and I'm having problems with my wireless connection. I'm using a Broadcom BCM43142 wireless card and using the Broadcom 802.11 Linux STA driver.

The wireless connection always shows at low signal. Sometimes it works at adequate speed, but most of the time the connection is slow (much slower than on Windows in which I have a dual boot partition).

I have tried uninstalling/reinstalling the driver. I have also already tried disabling IPv6 and also tried to avahi daemon fix to no avail.

I've run the following wireless script and this is the output

http://pastebin.com/BU5ZZJcY

Solution

In Debian 9 I used:

sudo apt install broadcom-sta-dkms

and it did the whole trick for my hp ProBook6570b laptop. I was getting a near 20Mbits/s before. I ran the command and rebooted the laptop for a clean start. After this all of a sudden I saw a 180Mbits/s

I am happy!

Comments

[Fabby]

Possible duplicate of Installing Broadcom Wireless Drivers

[Pilot6]

To close voters. The Broadcom driver is already installed.

[goo]

Check your MTU, and fix it. See askubuntu.com/questions/839731/…

[Jesse Lawson]

This should be the accepted answer. Pilot6's answer below could cause problems in maintaining a network connection, resulting in both an inability to install broadcom-sta-dkms and connect to wi-fi to continue to diagnose. Marcel's solution here worked well for me after a fresh install of Pop! OS with an ASUS/Broadcom external wi-fi setup.