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We have 4 computers in our flat. When I'm starting to use Ubuntu and when I'm connected to our network, at least one of them has connection problems, that is, their connection status says that everything is fine, but they can't, for example, explore the Internet or play online games. Nothing like that happens when I'm using Windows. How to fix it? My Ubuntu version is 13.10

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What is your wireless card? –  Rafał Cieślak Oct 17 '13 at 19:19
1  
Could it be unproper ip-setup? Check to see that you haven't got the same ip-adresses. (in win run cmd.exe and write ipconfig, in ubuntu check connection information in the top right corner) Just a thought... –  Björn Röyter Oct 17 '13 at 19:28
    
IP are different. Any other thoughts? And my wireless card is Broadcom 802.11n, built-in on my laptop –  Twórca Oct 17 '13 at 20:09
    
Some Broadcom cards cause such problems because the faulty proprietary driver is causing them to push too much power into the air, which temporarily deafens other devices askubuntu.com/questions/277064 –  Rafał Cieślak Oct 17 '13 at 20:42
    
Please run the terminal command: lspci -nn -d 14e4: Is your device by chance 14e4:4727?? It can be fixed. –  chili555 Oct 17 '13 at 20:43

2 Answers 2

up vote 3 down vote accepted

In Ubuntu 13.04, I believe the default bcmwl-kernel-source will not work correctly for your Broadcom 4313. I recommend that you get a temporary wired ethernet connection and open a terminal:

sudo apt-get remove --purge bcmwl-kernel-source
wget http://us.archive.ubuntu.com/ubuntu/pool/restricted/b/bcmwl/bcmwl-kernel-source_5.100.82.112+bdcom-0ubuntu3_amd64.deb

Or, if yours is a 32-bit system:

wget http://us.archive.ubuntu.com/ubuntu/pool/restricted/b/bcmwl/bcmwl-kernel-source_5.100.82.112+bdcom-0ubuntu3_i386.deb

Confirm 32- or 64-bit:

arch

Then do:

sudo dpkg -i bcmwl*.deb

Reboot and give us your report.

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Wow, man. How'd you guys figured it all out? I tried to google my problem and tips I saw there wasn't as specific and as accurate as yours. It's alright by now, my friends aren't experiencing any problems, neither am I. Really, really thanks. If anything bad will happen, I'll let you know. –  Twórca Oct 17 '13 at 23:29
    
A decade of study and I'm starting to get the hang of it! Glad it's working. –  chili555 Oct 18 '13 at 0:34

Have you check to see if your Ubuntu box is running a DHCP server?

It may be trying to act as a router.

Try this:

sudo ps -ef | grep dhcp

and if it returns anything, you might want to kill that process.

Post the results and I can help further.

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how to check it? –  Twórca Oct 17 '13 at 20:39
    
I updated the answer with what I would do. –  DaShaun Oct 17 '13 at 21:11
    
It returned the following: root 1717 1309 0 23:15 ? 00:00:00 /sbin/dhclient -d -sf /usr/lib/NetworkManager/nm-dhcp-client.action -pf /run/sendsigs.omit.d/network-manager.dhclient-eth1.pid -lf /var/lib/NetworkManager/dhclient-e84c827b-0ae8-4305-8fb3-6aac18d1616a-eth1.lease -cf /var/lib/NetworkManager/dhclient-eth1.conf eth1 cielaq 2349 2278 0 23:17 pts/0 00:00:00 grep --color=auto dhcp –  Twórca Oct 17 '13 at 21:20
    
That's not it. That's your client running. So, dhcp server isn't the issue. –  DaShaun Oct 18 '13 at 19:29

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