Ubuntu Networking :: Network Manager Or Router Suddenly Stopped Working
Nov 25, 2010
Right so yesterday my internet worked fine. Today - no connection at all. The light for my cable on the router doesn't even show up. I originally had indicator-network installed, so when the internet first stopped working, I tried a few other options such as tethering to my phone via usb and bluetooth (which I have successfully used in the past). However, these didn't work, and I figured that as connman is still in beta, maybe that was why. So I reinstalled network-manager and network-manager-gnome via a usb stick, uninstalled indicator-network, and rebooted the computer. Still no internet.
When I click on the applet, it says "No network devices are available". This is odd, as I definitely have a network device... it is part of the motherboard. So I thought I'd do the SMARTlan test or whatever it's called. It's part of my BIOS, so I ran that and it returned results that I (kinda) expected: when the cable wasn't plugged in, it returned one set of results. When it was only plugged into my computer (and not the router), it returned another set of results. And when it was plugged into both my computer and the router, it returned a third set of results. So that leads me to believe the cable itself is fine.
And when I move the cable to a different port on the router, nothing changes. The corresponding light still doesn't come on. Network-manager, telling there are no network devices. The BIOS can see the ethernet port and the cable. And the router is functioning perfectly for my parents' computer and my ps3. And I have checked the cable to my computer for physical damage - it follows the same path as the one to my ps3, and on top of that, nothing physical can possibly have happened to it in the last day. This happened once before, except I don't think the network devices were lost.
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Jul 26, 2011
My network manager application went missing a few days ago. I enabled it by right clicking on the taskbar above and opting for "show". It reappeared and worked fine. After I rebooted, however, it was there ok, but it doesn't respond to clicking at all. It has stopped working.
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Jul 13, 2011
When originally installing 11.04 I had problems getting my Ralink 5390 wireless card to work.
Today my computer froze completely and I had to turn it off via the power switch. When I turned it back on, wireless was no longer recognized! My iPod can connect to the network just fine, so it must be an Ubuntu problem. There are no problems with my ethernet connection either.
I researched this and found several threads about blocking and unblocking wireless devices using the rfkill command. Well, unfortunately for me the rfkill command doesn't work. When I type sudo rfkill list or sudo rfkill unblock all, nothing happens; it just returns me to my bash prompt. I even tried uninstalling and reinstalling rfkill...nothing.
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Oct 13, 2010
I've started to set up a server at my house, where I eventually want to run it headless, and I can just VNC in from my other Desktop. I installed Ubuntu 10.10, setup remote desktop on the server, and from there was able to do any work remotely. That was nice. I turn the computer off at night, and the next day when I was going to work on it, I cannot VNC in anymore. One day passed, and now every time I try to use VNC it comes up with "Failed to connect to server" I also set a static IP address on the server too, so I know the address isn't changing every so often.
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Jul 24, 2010
I'm using Ubuntu 10.04. I was happily connected to internet and surfing some forum, when wireless connection suddenly stopped working.
Now I can't find any access point, and I'm pretty sure I didn't do anything to justify this behaviour.
It already happened a month ago, but I had to format my drive, so I didn't really bother to try to solve the problem.
Anyway. I'm posting here the results of the commands I think I can help with a diagnosis; if something else is needed.
I'm using a different computer to post this thread, so I'm manually writing the output.
Code:
sudo iwconfig wlan0
wlan 0 IEEE 802.11bg ESSID: off/any
Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
sudo iwlist wlan0 scan
wlan0 No scan results
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Aug 12, 2010
Version: Ubuntu 10.04 Relavant hardware: P5QL Pro built-in ethernet, cable modem with linksys wireless-G router (although problem is with ethernet connection, not wireless)
One minute my ethernet was working, and the next it stopped working. The only thing that I did between it working and not working was install electricsheep from Synaptic and then I shut down the computer. When I restarted a bit later, no ethernet connection shows up.
I checked the cables, made sure they are in tight.
My laptop connects using the same ethernet cable fine. So its not the cable or the router.
I reset the router and the computer at the same time. Still doesn't work.
I don't know where to even start with troubleshooting this sort of problem. Everything to the extent of my computer knowledge seems to be working fine.
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Apr 18, 2011
I'm running a gateway lapbook w/10.04 LTS and an etheros wirless card. Card has been working fine for almost a year - from cold boot, warm boot, and recovery from standy (shut lid, open, press power button). I was fiddling with setting a static IP for the wirelss card by modifying the interfaces text file. I made some changes, and restored the file to its original contents after some noodling around. Wireless still worked fine after that. Last night I took the laptop out of suspend as usual - lifted lid, pressed power button - but the wireless indicator remained grayed out and I haven't been able to reenable wireless connectivity since. ifconfig shows the wireless card is there, and cabling the e-net port directly to my hub works fine.
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Jul 4, 2010
I installed Ubuntu 10.4 side by side with my Vista. This is on a PC I leave on permanently and use as a sort of Sever, so Security and Network connection are VERY important on this device. I use it for documents and IP PBX (telephone system). I currently use Vista and 3CX, but I plan to roll it over to Unbuntu full time once its up and runnng correctly - I will just need to change the Grub2 conf priority. After install, all was fine and I managed to make many changes to settings, apps and updates, but I have noticed in the past week when going in to make further changes the network has suddenly stopped working! According to Network Manager and the icon on the panel it is connected and I can not see anything obvious that is not correct. I tried doing a PING (192.168.1.1) from Network Manager to the main router, but it failed. I know that there is nothing wrong with the network nor the card or PC it all sits on. It's working now with Vista and my other machines. It must be a config some-where.
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Oct 14, 2010
I have an HP a670y desktop computer using the included wireless antenna (looks like a big Sorry game piece). I am running Ubuntu 10.04 x64 dual booted with Windows Vista x64. I haven't had internet for a while but just got it today and decided to do some updating in both Windows and Ubuntu. It had detected my router and I copied and pasted the WEP key then it asked for my password, but my keyboard wasn't connected so I clicked cancel for the password window and it connected anyway.
I opened the Synaptic package manager and started downloading some updates while I did some browsing on the internet. I had restarted my computer when the updates were done and it asked again for my WEP key. I copied and pasted just as I did before and entered my password and after it tried to connect it asked for my password again. I thought maybe the internet was down so I decided to boot up Windows and it connected right away. I wonder if one of my updates messed something up. Has anyone else had this happen?
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Apr 8, 2011
my Internet connection stopped working suddenly after updating the packages using synaptec package manager and rebooting it..can anyone say me why did this happen.BTW,mine is ubuntu 10.10 and i am absolute new to linux.I had to configure my n/w connections right from the scrap again
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Feb 9, 2009
I have an HP Pavilion notebook with a Broadcom WLANcard that had been working very nicely in Fedora Core 10 until this evening, when I took my notebook to a conference room where there was no internet access. (I tried to connect to wireless networks, but there were none in the area, as I discovered.) am now unable to connect to my local (home) wireless network as the device is now non-existent . Can someone please walk me through the steps to fix this or re-install it (I have tried reinstalling broadcom-wl, but that didn't help). My lspci listing is reproduced below:
Code:
00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03)
[code]...
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Aug 4, 2009
my eth0 suddenly stopped working on FC10. i have been using it the whole time, and now it refuses to even ping the gateway. dhclient is not receiving a dhcp offer and when i put in the information manually, it is not even able to ping the gateway. netstat -rn shows that the destination of the router is going nowhere.
i do not think it is the hardware/software, but rather maybe the provider? i am from central europe but just moved up to great britain and working at a friends place. i can connect the mac powerbook without a problem (it will get an ip with dhcp), but not the linux machine.it is a normal ethernet modem connection here. can it be, that it checks MAC addresses or even the computer names? the powerbook also has a really weired IP address: 77.102.xxxxx
i am not using network manager, but command line tools and have nm uninstalled. does anyone have a clue, what this could be about? i am not a newbie, but this is really puzzling me.....
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Sep 23, 2009
A few days ago (september 7) my wireless suddenly stopped working. I am using FC11, and have an Atheros AR5211 wireless card and have been using the ath5k driver with GNOME NetworkManager. Wireless networks are detected by NM perfectly fine. When I try to connect, the icon spins around those two dots, and one of them becomes green. If the network is wep protected, it asks for the password. After a while, it times out, regardless of the protection. I don't remember changing pretty much for the last two months, so I'm sort of surprised. I did download and install a kernal, along with an selinux-policy update.
If I run dmesg, relevant looking lines included:
ADDRCONF(NETDEV_UP): wlan0: link is not ready
and a long series of these at the end:
wlan0: direct probe to AP 00:0b:86:4f:8a:20 try 1
wlan0: direct probe to AP 00:0b:86:4f:8a:20 try 1
[code]....
Note: I previously posted this in "Laptops," but Networking seemed like a better place to do it.
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Feb 7, 2011
I've been running Ubuntu 10.10 on this ThinkPad for a couple of months now, with absolutely no problems at all.The wireless was working fine earlier today out at a coffee shop. When I got home and turned the computer on, the network applet just showed a "Wireless is disabled" message.I poked around for a while, mucking with whatever I could (limited, unfortunately, I don't have great linux-fu) and doing the ritual reboot to see if that would get things going.I then spent some time reading through forum threads here, but didn't find any answers.Below are the results of the various commands as described in HOWTO post a Wireless issue (ticket) sticky threadMachine brand and model
Code:
Lenovo ThinkPad T60p
lspci -nn | grep Atheros
[code]....
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May 24, 2011
I have been using ubuntu 10.04 LTS for the last 5 months, used tata photon plus for networking. Everything went fine when couple of days ago, after doing normal updates as listed by the update manager, sound went off.. to solve this, I had to remove and reinstall certain packages as listed in [URL] ...+documentation, I had to restart, after restarting, the sound problem was gone but the network manager icon went off, the modem was not getting power from the computer though the LAN wire was connected. To add to dismay, the mobile broadband connections that I had added to the network manager were gone. I tried adding the tata photon plus (huwaein) again but could not be added, reinstalled usb-mode switch data and related packages, but still the computer does not detect the photon as usb device. I have broadband dsl connection and tata photon plus too but cant use any of them.
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Sep 17, 2009
I have a wireless router at home, but I usually have my laptop connected to it through an ethernet cable. It had always worked with no problems until some time last week when the wired network stopped working (but the wireless still works with no problem). At first I thought that it was some update, but no. My laptop works ok with the wired network at my office, and I also tried a different laptop at home and it didn't work. It's not the cable either, I tried a different one. I haven't changed any settings in my router.So I really don't know what's going on. I just find it weird that the router's wired networking suddenly stops working but the wireless still works fine...
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Apr 24, 2011
running ubuntu 10.10 on a toshiba laptop recently the wireless Internet stopped working from our netgear router, it still works for the Ienova laptop and emachines desktop using the router but this laptop will not work wirelessly internet cuts in and out on this laptop when on wireless when it didn't previously do so it reads a connection but will not load up web pages unless hard wired in with an ethernet cord.
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Jan 24, 2011
I am a Windows refugee who discovered Ubuntu as a way to save my files from my virus-ravaged computer. Had no installation discs for Windows, so when I had to wipe my hard drive and start over, I decided to give Ubuntu a try. I've had mixed success, but that's another post...
Right now, the problem is that I installed 10.10 two weeks ago and was able to connect to the Internet with no problems - until yesterday. Suddenly, our wireless network (the only one in the vicinity) does not come up as available in Network Manager. In fact, the entire wireless option disappeared. I know there are many posts and threads on here about this, but weeding through them trying to find an answer is more frustrating than actually dealing with the problem. I know the router works because I can post on this forum from the Macbook. I really like Ubuntu and would like to keep using it, but not being able to connect to the Internet now on top of the other issues I've had is making me doubt I want to continue down this Linux road.
P.S. When I attempted an analysis through System Testing, it said something about there being no proprietary drivers?
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Mar 16, 2010
I thought to uninstall Gnome Network manager since it was always asking for to connect with wireless internet but it was working fine with wired internet.I uninstalled it and installed wicd. and then for some unknown reasons the internet disappeared.Kindly let me know How can i get back network manager without having internet and make internet work on my computer.I did searched a lot on Ubuntu forums using somone's else computer but no success.So if you let me know how to approach the problem in right manner it shal be great .
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Feb 8, 2010
i'm running Kubuntu karmic and i've been using a 3G Huawei E1552 modem to connect to the internet, everything was going well when suddenly my modem stopped working. I've tried reconfiguring everything, i even reinstalled kubuntu from scratch with no success.Here's a part of my /var/log/debug
HTML Code:
Feb 8 17:14:01 alberto-laptop kernel: [ 1532.099883] usb-storage: device found at 7
Feb 8 17:14:01 alberto-laptop kernel: [ 1532.099888] usb-storage: waiting for device to
[code].....
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Sep 3, 2010
Ubuntu and I'm using the latest stable version. Yesterday I had my sound working, but today my sound has stopped working.I've taken the following steps without success:System -> Administrator -> Hardware Devices (finds nothing)
Code:
sudo apt update
sudo apt-get update
[code]...
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Nov 19, 2010
A couple days ago I booted up my Ubuntu 10.10 machine as usual,but the wired LAN connection did not work; it doesn't seem to see any wired connection devices. I can still connect to a wireless network with no problem, and if I plug that same ethernetable into another machine it works fine. I've been happily using this setup for weeks; the LAN only stopped working a day or two ago. So I figure there's two possibilities:A recent update caused NetworkManager to stop working with wired LAN connections, but I'm e only persothed affected (unlikely)My motherboard's ethernet port died (this motherboard only a couple weeks old, so this also seems unlikely)I'm not good at diagnosing problems with networking, so who can tell me where to st
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May 13, 2011
I have no idea what happened. When I restarted my laptop a message telling me that my hardware cannot support Unity came up. This is quite impossible, because I've been running Unity with no problems since 11.04 was released.
Compiz says that the interface is unity, and when I checked in login screen, it's not set to Ubuntu Classic or anything, just Ubuntu.
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May 23, 2011
I have an asus EEE 1015N. Everything worked fine yesterday. I packed my computer, and went back home. After turning it back on, not only it didn't connect to the wifi network, but it did not even detect it. I know it's not broken or anything like that because when I boot into windows it works fine.I've been trying every solutionven in the "sudden wifi problems" threads in the forum (including checking the wifi power button, and trying to manually assign an access point to it), but to no avail.
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May 27, 2011
My skype has suddenly stopped working. It starts then stops halfway though the startup. If i run it from the terminal it say Aborted as it stops. I've triedupdating the whole system, including enabling thee and backports options in software sources. I've tried re-installing skype, I've even re-installed the whole system.
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Jun 25, 2011
I'm running 64-bit Ubuntu 11.04. I recently updated virtual box and wine. I also installed the expansion kit for the virtual box. Now Ubuntu doesn't read my sound card. I tried reinstalling alsa and pulseaudio but that did not help.
aplay -l shows no sound cards.
I have a Realtek ALC892 8-Channel HD Audio sound card.
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Mar 9, 2010
I am a proud user of ubuntu and basically this is my desktop: I have got rid of the bottom gnome taskbar and replaced it with cairo-dock and the top toolbar is only showing one pixel with a delay scroll down so when i hover by it it doesnt keep popping down unless i leave the mouse there. anyway thats besides the point. i use cairo-dock and have done for over 4 months. then all of a sudden it stopped working. I don't have a clue why, perhaps you have encountered this problem and know of a solution. im using 9.04 jaunty and latest cairo-dock. when i type cairo-dock -c into terminal i get:
[code]....
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Oct 24, 2010
I can't get any sound from either online audio or from a CD in drive. I've watched videos with sound with only occasional problems until today. I have been using MPlayer with internal audio 1 output - analog stereo output. When I start a vid, it will begin to D/L and play, but without sound. When I try to check the volume level everything pauses and then my system freezes. Sometimes it will release in a few seconds, but mostly it won't allow me to close Firefox and if I try to close the tab or window or Firefox, I have to reboot. Sometimes the vid will D/L without a problem, but no audio on playback. Oddly, when I bring up the system monitor, processors will show 1 or 2 cores stuck at 100% while the others fluctuate wildly. Download speed falls to almost nothing with occasional blips or nothing. I checked several sites and they all have the same problem. I have checked my physical connections, and bios settings.
There is an option for a RS780 Azalia controller 1 output Digital Stereo (HDMI) output, but I have not been able to make it work since the system was new. I don't know why.
This is the most recent SYSLOG file. The pulse audio errors have always been there, but since it didn't seem to affect playback, I didn't run it down.
Oct 24 16:04:19 jess-desktop kernel: [ 889.588898] cdrom: This disc doesn't have any tracks I recognize!
Oct 24 16:04:19 jess-desktop kernel: [ 889.609167] sr 0:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[Code].....
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Jan 5, 2011
I'm using Ubuntu and my sound was working fine and then suddenly it just stopped working.
It does however, have odd spells where its working (for like 2 minutes) but those spells are few and far between. So basically the sound is not working.
When it isn't working my speaker seem to be making these hissing/screeching noises.
I've tried looking up on Google on how to fix it, i.e. running terminals, etc. but still haven't come round to fixing it. Could someone explain to me how to fix the sound please?
And no, the speakers aren't on mute. I checked volume control and everything is full.
Summary:
Laptop: Acer
OS: Ubuntu 9.something
Sound card: hda-intel
Problem: Sound not working
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Mar 18, 2011
I have recently noticed that my keyboard shortcuts stopped working.Things like F2 to rename files/folders, I think its ALT+F1 to bring up applications menu, however it comes up with a dialog saying Power Information. I also can not use backspace in FF to go back a page and things like that, which I find very annoying because I prefer to navigate with the keyboard and that deal.Yes I have Compiz installed however I have for a few months now without this problem which appeared only within the last fw days. I have had k at the keyboard shortcuts in Compiz and set them to default but nothing changed
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