Ubuntu Networking :: Wireless Network Connection Troubleshooting
Jul 9, 2011
Just installed ubuntu 11.04 on an old pc. At first, I was unable use my wireless usb adapter (netgear wpn111), but was successful after installing ndiswrapper-common and ndiswrapper-utils-1.9 manually. cool! then I updated all packages successfully via synaptic package manager and rebooted.now I have lost network connectivity. the os still sees the wireless usb adapter, but I have no connectivity. the indicator applet shows an exclamation point.
How can I troubleshoot this? are there logs? can I fallback to a previous good state?I am new to ubuntu, but experienced in unix. note: my pc only has 1/2 GB memory if that matters. but, hey, it worked once.
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Aug 16, 2010
I have had no problems connecting to any of my wireless networks in the past. Right now I am at a friend's house and can't get internet access with my laptop. I have entered the appropriate fields in /etc/network/interfaces (as I usually do)
auto wlan0
iface wlan0 inet static
address 192.168.2.64
netmask 255.255.255.0
broadcast 192.168.2.255
gateway 192.168.2.1
I checked this info with the router's web interface and everything seems fit. The network does not have a password. I have tried adding "wpa-ssid belkin5g" and "wireless-ssid belkin54g", and neither one works (can't ping the router after bringing wlan0 down then back up). I have also tried connecting with DHCP instead of setting a static address.
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Apr 1, 2011
I installed Gadmin-Samba and a eth1. Setup the info in gadmin for waht I could follow and then shared the bub folder in win7. Have direct cable between the 2 nics, they see each other, however Win 7 says "unidentified network" (with a bench) and no connection established. In Ubuntu Places/network folder it has "Windows Netork" folder, but its empty. What am I missing?
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Jan 24, 2010
Its a case of ".... wireless network connection active but still not internet connection .."I am using WEP - 128 key ... Works when I connect directly using ethernet cable ... but not wireless (pci and wireless router)
ubuadmin@ubucomputer:~$ ifconfig
wlan0 Link encap:Ethernet HWaddr 00:06:25:12:83:3b
inet addr:192.168.1.10 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::206:25ff:fe12:833b/64 Scope:Link[code].....
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Sep 1, 2011
I've got a server that I've been trying to get Ubuntu Server 10.04.01 LTS installed and running on and I've gotten incredibly close to having it work, but the Network is still giving me issues. The installer went off without a hitch (once I fixed some optical drive issues) and it has actually detected the "Intel Corporation 82576 Gigabit Network Connection (rev 01)" Dual-port onboard NIC which shows up when I run lspci. I statically assigned an IP, Subnet, DNS Server and Gateway to eth0 and things looked good. ifconfig showed that it was "UP", and I could ping localhost, but if I tried to ping anything on the LAN it said "Destination Host Unreachable".
Here's the ifconfig and lspci (snippet)
======== ifconfig ========
eth0 Link encap:Ethernet HWaddr 00:25:90:2d:26:98
inet addr:172.30.1.75 Bcast:172.30.3.255 Mask:255.255.252.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
[code]...
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Mar 5, 2010
Hi - I am new to Linux and Ubuntu so I have no idea how to fix or problem solve unfortunately I installed Ubuntu 9.10 from scratch recently on this laptop and all was good. I connected to my WIFI network no problem. It's WPA PSK encrypted, DHCP enabled. I just set it up in Network Manager and it was all fine. Then after a few days I installed a printer and some packages and updates via synaptics. The network connection started dropping after 20 mins or so. Only a reboot would restore it - auto connects at first, runs fine till it drops then never will reconnect. I posted on here, someone gave me some lines to put in a config file. I tried that. I didn't seem to help much, problem remained. Yesterday I checked for updates and there were a whole bunch so I just installed them all. Now I cannot connect at all. I have deleted and recreated the connection in Network Manager but it doesn't help. It tries to establish a connection but never achieves it. I am connecting to the internet now on the same laptop booted into Windows, so all the hardware is fine.
Can anyone who knows about ubuntu networking help? Do I need to do a complete reinstall? Seems a bit much, but it worked when I initially installed the OS. I want to like Ubuntu, but something as basic as connecting to the internet is pretty vital so reluctantly having to start using Windows again...
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Jul 20, 2010
I just got my first laptop, an ASUS eee pc 1201n. It came with Windows 7, but i decided to load the latest version of Ubuntu Netbook Edition on it as well.Today when I tried to access the internet via my library's free wireless service I couldn't get Ubuntu to recognize any wireless connections. I checked with Windows 7 and several networks appeared, including my libraries, but Ubuntu was blank.
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Jul 28, 2011
I installed Jolicloud OS with Windows XP before because Windows XP have too many virus to attachment to Internet so whenever I go on the internet, most of the link take us to random site so I just installed Jolicloud OS however, some reason, I don't like Jolicloud very much because it require to enter the user name and password to link Jolicloud so wasted my time to use it... Its cool but pointless.
So, I just realised Ubuntu also provided free Ubuntu OS for netbook. After I downloaded Ubuntu desktop 11.04 and installed the system (all the datas is now gone and only current OS is Ubuntu)So, once I installed it... The netbook seem running well and no problem however, there is a huge problem is wireless are not found so I can't even use the Internet!.This netbook only got wireless and nothing else to connect like cable (wired).
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Jan 4, 2011
Ubuntu 10.04: no problems to connect to secured wifi networks. However, when trying to establish a connection to an insecure wifi after some time I get the message "disconnected, you are now offline" without ever having been connected. Once out of about 30 times I get a normal connection. My eeePC 1005HA is double boot and I can connect from WinXP without problems. There seems to be a DHCP timeout (see attached output of syslog). I have seen some posts about the same problem but none of them had a solution. I hate it to use WinXP just for the sake of connecting to the spot.
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Apr 29, 2010
I just finished upgrading from 9.10 to 10.04 via the Update Manager. My first noticeable problem is that my wireless connection with my home network no longer functions on my IBM Thinkpad T42 laptop.The Network Manager applet shows that it detects my home network (and those of several of my neighbors), but I have not been able to get it to connect to this network. I've been using WPA & WPA2 Personal settings for security, and the Network Manager applet had correctly picked up the password that I had been using under 9.10. I've searched the Ubuntu Forums for "wireless T42" and thought I'd found a solution in a posting that recommended using the "wcid" network manager, but I've been unable to find wcid either via the Synaptic Package Manager or the Ubuntu Software Center.
1. I've noticed that in Lucid Lynx the Network Manager applet's icon in the top panel is no longer the vertical bars symbol that it displayed in
Karmic Koala; instead, the icon is a radiating fan display. In the Network Manager's edit Network Connections window, this fan icon is shown on the Wireless Connection tab, while the vertical bars icon is shown on the Mobile Broadband tab.
2. The Wireless Connection tab shows, on the line in which it shows awareness of my home wireless network (as "Auto 389690") that this connection was "Last Used" "1 month ago". It should be saying something like "today".
FWIW, the Network Manager detected my wired "eth0" connection with no difficulty.Both Jaunty and Karmic picked up my home wireless connection without any problems. Now I have no idea what to try next.
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Jul 31, 2010
I recently installed Ubuntu 10.04 on my Acer TravelMate 3270 notebook (with Windows 7 dual boot) for everyday use. All is great except i started to notice my Wireless Network get disconnected and then reconnects every 5 minutes or so. Also the NetworkManager Applet 0.8 keep annoying me with the notifications that its disconnected and then reconnected.
I do not have this issue while using Windows 7 (in the same area). Can this be fixed. As i really want to move my day to day computing need to Ubuntu.
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Jan 27, 2011
I'm trying to connect to a hidden wireless network in ubuntu through the terminal but i am unable to do so.
I first tried using ifconfig,iwconfig and dhclient initially but i am only able to get an ip address without the default gateway and dns server addresses which i normally get through the network manager applet.
Then i tried using cnetworkmanager but failed miserably again i keep getting this error
Code:
Another applet is running: Bus name already exists: org.freedesktop.NetworkManagerUserSettings (pid 1851)
Then i used nmcli available with the network manager package. i was able to establish a connection only with the connections showed in the list. i use a hidden wireless network. i am unable to connect to the hidden wireless network using nmcli without actually creating a connection from the network manager applet.
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Feb 25, 2010
I'm trying to set up a wireless or wired network (wireless would be better...) to share my connection with my housemate, as well as with some devices. The only guide I found regarding this (I must admit, I didn't have much time to put into research), was dating back to 2005, and although doable, seemed somewhat confusing. Getting to the point: is there a way (maybe a standalone program, or some kind of plugin) to share a connection?
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Feb 17, 2009
I've installed F10 on my laptop since few days and I'm facing an annoying networking issue: the network connection seems to work well when, suddently, it goes down for a while, and then come back.This happens with both wired and wireless (Intel PRO/ Wireless 3945ABG) connection.
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Jun 14, 2011
I was on my wireless network when I accidently switched on "airplane mode". Several reboots later and I can't get back onto my network. It keeps prompting for a password, even though it's the correct password. I've booted into Mac OSX & Windows on the same laptop and they connect no problems.
How can I delete the network connection to take it from the top again ? You used to be able to right click on the network connection in F14, select "edit connections" and then delete anything that was offending. That seems to have been removed now though ? Where is it stored and where can I kill it ?
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Nov 1, 2010
I changed the network setting and caused a problem of wireless network. After I completely reinstall the OS of Fedora 13, the wireless network is still incorrect for connection to router.
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Mar 16, 2011
I'm having some problems with my wireless connection. I'm on Ubuntu 10.04, on a HP ProBook 4520s, with a RaLink RT3090 wireless network card. I installed the drivers (hopefully correctly), the wireless seems to work correctly, it scans and finds networks, but when I try to connect to one, it times out after some time, while still attempting to connect. I also have a wired connection that works correctly and without problems. Other computers that try to connect to said wireless network manage to do so without any problems, so this has left me a bit baffled, since, like I said, everything seems to be in order.
I'm a new Ubuntu user, so please tell me what other information I need to provide in order to easily and successfully facilitate troubleshooting this, because it is, as you can imagine, quite aggravating, having a laptop that needs to be connected to the internet through a cable.
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May 26, 2009
My computer takes a while to connect to my Linksys N router.
It used to connect in a snap of your finger automatically.
Now it does not.
Yes I have tried manual configuration, and double checking the password, ssid, protocols, and security type.
WPA2 personal is the security type.
There are maybe 4 different ways I know how to connect. The most annoying thing is when this box pops up saying to type in a password for the network connection.. and keeps popping up even when everything is right.
All I need is a reliable, easy, and automatic program to connect me to the internet, maybe even before I log into my system.
Linux Ubuntu 8.04 LTS Desktop Edition is my system. Brilliant system.
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Jul 6, 2009
Intel Corporation PRO/Wireless 2200BG [Calexico2] Network Connection (rev 05) is not working on centos5.3
# uname -r
2.6.18-128.1.16.el5
# lspci | grep Wireless
0b:02.0 Network controller: Intel Corporation PRO/Wireless 2200BG [Calexico2] Network Connection (rev 05)
[Code]....
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Jan 19, 2009
I have a Mandriva linux box connected by cable to my router. When I stream audio using this box it crashes all the wireless computers on my network. There is no effect on wired computers. All but the one computer are windows (xp or vista). The affected wireless computers are not able to even find my wireless network. I have to reboot the router to get them online.
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Mar 28, 2010
A friend who switched ISP's gave me his old Linksys WRT54-G wireless router. I went through the installation procedure and had a wireless connection up and running - smiley face. I had security set up for WPA, and decided to upgrade it to WPA2. Another smiley face. When I went to connect (had already done so successfully), I noticed it referred to my wireless as Linksys - I was expecting to see the SSID. So I started playing around in Network Manager and now I have things all effed up.
Don't know exactly what I did, but now I have no wireless. So I ran a few commands (lshw -C network, iwconfig, ifconfig, and iwlist scan), and looking at the results I see what appear to be inconsistencies in the output. I've posted them below, and make the following observations:
1. Under the lshw it refers to my wireless connection logical name as wmaster0, and has the correct MAC address, etc.
2. Under the iwconfig it says, 'wmaster0 no wireless extensions', but then refers to wlan0 as the wireless connection (although it does not seem to be running).
3. Under ifconfig I see both a wlan0 and a wlan0:avahi. The wlan0 has no IP, the wlan0:avahi does, but it is incorrect.
[Code]...
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Jul 9, 2010
I need to setup an Ubuntu Server to handle backups over the network (probably rsync over ssh). That server will then transfer the backup data offsite over a secondary external data line.How can I configure the ethernet interfaces to handle such a scenario?
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Apr 23, 2011
I own an ASUS N61JV-X2 notebook PC. It has an Atheros Communication, Inc. AR9285 Wireless Network Adapter. 03:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01) 03:00.0 0280: 168c:002b (rev 01) I cannot see any SSIDs including my home Verizon FiOS 802.11 G WPA2-AES-TKIP encrypted network. I went to Starbucks to try to connect to their free Wi-Fi and I could not make a connection. How do I solve this problem so that I can connect to a SSID of my choice and make a wireless connection while using GNOME 3?
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Apr 6, 2009
This computer is using a Linksys WMP54G network adapter, and running Linux Ubuntu 8.10 with all of the latest updates. It was working fine for a couple months, then one day the internet quit working on it. I've tried playing with all of the settings, and can't get it to connect to the network. The windows computers in the house work fine. I also hooked my Linksys WUSB54GS USB network adapter and that worked right away. When I put the WMP54G back in, it will detect the networks but it won't connect. It gives the message, "the network connection has been disconnected", right away. Can someone please help with this. I work doing tech support for a small ISP and am excellent troubleshooting Windows but Linux is another story.
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Mar 6, 2010
I've gone through the trouble-shooting procedure discussed in the "lwfinger" stickies. My results are shown below. Output of all test steps looks fine until I run "ifconfig" - no valid IP address is reported. My access point works fine with other devices (including an existing 11.1 install).My detailed trouble-shooting output is shown below.
TROUBLE-SHOOTING SUMMARY
- wpa_supplicant software is installed
- network controller data are identified by "lspci" commands (no switch, -v, -n), including:
[code]...
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Jun 11, 2010
These problems just started the last couple of days but I have been using Lucid 10.04 for a month now. My wireless Signal varies in strength wildly. I sitting at home, not 20 feet from my router. I never had these problems before Ubuntu Lucid Lynx 10.04. I am running both Network Manager and Wicd.
Errors:
1. Wicd states "Wrong Password" which is not true.
2. Dropping off-line for no reason, sometimes 3 or 4 times a minute and sometimes it works fine for hours.
3. Firefox 3.6.3 Automatically Checking "Work Offline"!?
[Code]...
I have the Proper Wireless Drivers. I have not changed my wireless settings, channel or WPA for 8 months now so I know thats not it.
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Jun 11, 2011
My problem is exactly the same as [URL]
but I am stuck at the last hurdle
here are the output of the command that helped to solve the case in the previous post:
ifconfig wlan0
wlan0 Link encap:Ethernet HWaddr 00:1b:77:d2:59:55
inet6 addr: fe80::21b:77ff:fed2:5955/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
[Code].....
I have also tried sudo dhclient but it hasn't helped and I am still unable to connect to the internet
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Jun 21, 2009
I have installed Fedora 11 recently. I want to share my Internet connection.
I have e LAN connection eth0 which is connected to internet.
I have a Wireless connection wlan0.
I want to share my internet connection with wireless connection.
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Feb 4, 2010
I have two linux laptops. Currently, I'm using both of them at work, side-by-side. Now the problem is, I'm connected to a wireless router, but the wireless only works on one of the laptops. So I'm stuck with one laptop that has no access to the internet. Both machines do, however, have working ethernet nic cards. So, I was wondering if I could use the laptop with the wireless connection to share the internet connection with my other linux machine and access the internet on both of them. Or as an alternative, just use the internet on the machine without wireless and be able to switch back and forth, that would increase my productivity like 30 fold.
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Mar 2, 2011
I have installed qemu/kvm and created a Bridged network connection which works just fine(Windows 7 VM won't work in NAT mode.)
But when I try to use NetworkManager it says that I have no network connection because the network isn't managed, (I set the settings in ifcfg-br0 and ifcfg-eth0 to be managed)
The real problem is that now I can't use my VPN connections (I have many) in NetworkManager.
Is there a way to have both of these pieces of functionality?
I am using FC14
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