Ubuntu Networking :: System Crash When Wireless Connects?
Jun 17, 2011
I've recently installed release 11.04 and am trying to get wireless networking operational. I'm using a netgear wg111t usb wireless adapter. I've installed ndiswrapper and have got the netgear windows drivers installed ok. My problem is when I try to connect wirelessly I get a system crash, think it tends to be called a kernel panic in linux. The network connection is confirmed and about 5-10 seconds later the crash happens. I've updated the linux kernel to 2.6.39-0-generic but thats not helped.
I can connect with a cable but that is somewhat limiting.
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Jul 1, 2011
sent the following email to Broadcom [URL]. I'll post an update if I receive a response. The current Linux STA 802.11 driver causes my system to crash.I've verified this under Ubuntu 11.04 and Linux Mint 11(an ubuntu derivative). Oddly enough, everything worked find under Ubuntu 10.10. My chipset is the 4321, my CPU is an AMD Phenom II 920, and the motherboard is an ASUS M3A78-EM. I tried the STA driver that ships with Ubuntu as well as compiling the one at [URL], including the patch for kernel versions > 2.6.37.
I am confident that the linux driver is the problem. If I connect my machine to my router using an ethernet cable, everything works fine. Also, the wifi adapter works fine under Windows. The symptoms are that the wifi adapter appears to connect to my network correctly and works fine for short transfers. But when I try a larger transfer, such as a speed test or streaming an mp3, one of three things happens after about 5 to 10 seconds:
1) The screen remains in graphics mode but locks up, including the mouse pointer. No keyboard input has any effect.
2) The screen goes into text mode and repeats the following over and over: [435.610002] ehci_hcd 0000:00:13.2CI-DMA:Out of IOMMU space for 18 bytes.
3) The screen goes into text mode and prints what appear to be CPU register contents. I took a picture of this with my phone if it will help, but obviously the text is kind of hard to make out.
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Jan 9, 2010
I've got a Zotac MAG HD-ND01 with XBMC live installed. This is built on Karmic Koala and runs very nicely through the wired NIC.
I configure the box using a cable. I'm using WPA2-PSK and it is clearly authenticating OK.. It gets an IP address.. the AP shows a connection to the box. My XP laptop connects to the access point OK.. just can't connect to the box via the wireless, and it can't see the network using wireless.
I have followed a number of threads on connecting Atheros 9XXX wireless [URL] but no joy.
Also, can Ubuntu connect to the AP at any speed greater than 54MB? My windows PC connects at 144MB+ . Will ndiswrappers connect at those sorts of speeds?
lspci -nn
04:00.0 Network controller [0280]: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) [168c:002b] (rev 01)
iwconfig
lo no wireless extensions.
[Code]....
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Feb 1, 2011
My wireless connection always worked. When I log in, I already have internet access.I went on holiday and connected to several other networks.Now the laptop will not connect anymore. Sometimes after 5-10 minutes.When I forse to connect ("Connect to hidden wireless network), the laptop connects after several seconds. But not automatically.My wireless modem uses WPA2, MAC filtering and has a hidden access point.I use Ubuntu 10.4 on a HP Probook laptop. In "Network connections", under "Wireless", the "Connect Automaticly" and "Available to all users" are selected. When connected, the signal strenght is very good.
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May 24, 2010
I have a Compaq Presario CQ42-195TX laptop with Ubuntu 10.04 (64-bit) installed on it and fully updated. It has a Realtek RTL8191SE wireless chipset which I am having trouble with - its wired connection is working perfectly.After starting up, I am able to see and connect to wireless networks. Once connected, the wireless functions correctly for a very brief period (under 10 seconds) in which I am able to access the Internet and so forth. The connection then stops working - although it doesn't get disconnected. When I say it "stops working", I mean I can no longer access the Internet and trying to ping the router gives me a "Destination Host Unreachable" error. If I disconnect from the network I cannot reconnect, nor can I connect to any other network.- though I can still see the list of available networks.
I thought that maybe this was a 64-bit issue, but I tried the Ubuntu 10.04 32-bit live CD and experienced the same problem.Please note that while this thread is about the RTL8191SE chipset, the RTL819xSE chipsets all use the same driver.Below are the results of various commands while connected to the network but after the connection has stopped functioning correctly:lspci -nn | grep "Realtek"
Code:
02:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. Device [10ec:8171] (rev 10)
03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast
[code]....
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Jul 3, 2011
I recently installed UBuntu 11.04 and dual booting it with WIndows 7, I really like linux and considering removing W7 and only have Ubuntu But the problem is I can only connect when using an ethernet cable, when it comes to wirelesss, I type my password, yet a ring keep rotating and it never connects. My laptop is HP-G62
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May 26, 2009
I am using Fedora 8 on my laptop, newly installed, I can see the network card(Linksys WPc54G v2) and Network Manager sees the wireless router, however as soon as I tell it to connect my computer freezes and I have to restart. I searched for solutions but all I found was Ubuntu problems.
Actually it seems that the trigger is when the keyring comes up and asks for a password. As soon as I start typing the pass it locks.
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Apr 23, 2010
The computer connects wirelessly to a router. The router is connected to the internet and that is working well. (If i use a cable connection to the router, I can reach the internet).
Why wont the wireless connection reach the Internet? It is a strong connection. It worked before wirelessly. I am on 10.04 beta, with the recent updates installed.
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May 12, 2011
Wireless connects fine, then disconnects regularly. I thought it might be an issue with the rt2870sta driver, so I blacklisted it, and it uses rt2800usb now:
Code:
[ 13.625932] rt2870sta: module is from the staging directory, the quality is unknown, you have been warned.
[ 13.633139] usbcore: registered new interface driver rt2870
[Code]...
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Sep 15, 2010
First- clean installation of Ubuntu 10.04, with default network manager installed, I had a taskbar icon, and it could see the available wireless networks, could not connect to them, even the ones with no security. Purged all network manager files suggested in various threads here, Installed wicd- it could see all available networks, could connect to unsecured networks, but not to my own secured network. Password was correct in the wicd/configurations file. Removed wicd, and reinstalled network manager from synaptic. I have to network manager applet. When I try to add it to the notification area with alt-f2, applet-nm, I get a brief flash of something in the notification area, but no applet.
System=>Preferences=>network connections shows no wireless connections, but I'm obviously connected to something (probably my neighbors unsecured network) since I"m reaching this webpage. I tried to run sudo wpa_cli from the terminal to see what network the computer is connected to, and it gives me this error:
Quote:
Could not connect to wpa_supplicant - re-trying
wpa supplicant is installed according to synaptic
Various troubleshooting output:
[code]...
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Aug 5, 2010
I am getting trouble with knetwork manager. I created a new connection by scanning and connecting using knetwork manager. But every time connection gets disconnected and ask for password and again it connects.
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Apr 30, 2011
I just upgraded to Kubuntu 11.04 and I have a problem with network manager. When I plug in my LAN, everything works fine, but when I try to use my wireless connection, everything hangs after a few seconds. I'm guessing it's a cpu overload problem, since CPU fan starts after a while. But I can't move my mouse and keyboard doesn't work either. I tried network-manager-gnome and reinstalling wireless driver, but it didn't solve the problem.
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Jan 16, 2011
My wireless adapter connects to my WPA2 network perfectly, but when I run firefox it says it can't load the webpage, no matter what page I go to. Also, downloading new software doesn't work either. Any ideas please?
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Mar 10, 2011
I'm using the new opensuse 11.4 with KDE desktop. I can connect to my WPA2 personal network fine, but some other networks, like a WPA2 enterprise network connects, but no Internet(pinging too) resolves.
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May 26, 2011
I'm using crux 2.7. I'm connecting from the command line and I successfully get an IP leased. Usually 192.168.1.3
But still I can't ping my router.
I've never encountered this and I'm not sure how to trouble shoot it. The router is working just fine. The problem is with my Crux setup.
I have no internet and no GUI installed yet.
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Jun 8, 2010
When my router switches off... the wifi signals go off... then why the hell ubuntu keeps on connecting to that very wifi like hell and when doesnt connect shows the prompt to manually connect... with the wifi key already filled in... whats the use of saving the key when it has to ask the question from me either to connect or not?? and if its isnt available... just wait when its available.. and for the prompt,i have only option to cancel(because wifi isnt available at that moment if i select connect it again tries to connect like hell..which it cant) and if i cancel it wont auto-connect when wifi does get available! what the heck?
Windows has this done the right way... when the wifi isnt available.. it dissconnects silently.. and when it becomes available connects silently.. why isnt this been done this way in ubuntu??
Ive attached an image..one can see in the image that it says "authentication required by wireless network" when there isnt any.. as router has gone down!
And the second thing i want to report is that there is no way to report this bug from ubuntu... the launchpad.net talks of going through bug reporting process which is done against a definite package... now how does a user know which package would be causing this error?? there should be a more clear process of reporting such bugs to ubuntu team... which a common man using ubuntu( ubuntu says its most user friendly of all distros right?) can report..
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Jan 7, 2010
Got a laptop with a RTL8187B wlan card, installed opensuse 11.2 on a 50gb partition. Card was detected straight away but only connects when I enter ip addresses manually, DHCP don't work.
When it is connected it always stays at a speed of 1mb/s and it cannot ping my router or anything else.
Me kernel is 2.6.31.8-0.1-desktop
Searched around the forums but no love, tried compat-wireless but it started crying about dependencies. Modprobed it too..
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Mar 9, 2010
In openSuse I can connect to a wireless network. It says that it is connected, and I can open the router page (http://192.168.1.1/basic.html). But I cannot load any other pages. Nothing else recognizes internet either; I tried using konqueror, YAST and wget with the command line, and none of them could load anything. It is not a router problem or a wireless card problem because both Ubuntu and Kubuntu can connect, from the same computer. I know this is odd because in the only other thread I could find with this issue, it was a different distro and installing openSuse seemed to fix it.
Hardware:
Computer: Yakumo Notebook model 331
Network Card: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
RaLink RT2500 802.11g Cardbus/mini-PCI (rev 01)
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Jan 9, 2011
I have an Acer Aspire One D255 netbook with opensuse 11.3 installed and after several painstaking days of tinkering I successfully installed the broadcom wl drivers, and now my wifi card is operational. However, i can connect to my wireless network, but still have no internet access. I have searched the forums and google for a solution but most issues I have found that are similar to mine have been resolved once the wl drivers and firmware where installed
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Mar 26, 2009
now my system does not connects automatically when fedora start's to eth0 i have to connect it manually by pull down menu in the beginning hostnname was dbe272b22.dslam-172-17-161-245-0532-474.dsl.cantv.net i do not remember if the last part ".cantv.net" was there.... i changed hostname "dbe272b22.dslam-172-17-161-245-0532-474.dsl" maybe ending with ".cantv.net" with system-config-network for hostname "edicta" i modified /etc/hosts by hand twice, now do not remember what i did exacly but here you can see /etc/hosts
[Code]....
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Aug 30, 2010
I use release 11.2 and this one works very well. I try new release 11.3 and my system crash when I wont to start system on runlevel 5. There is Sempron 2 GHz CPU and nvidia fx550 graphics card. Keyboard PS2 does not responds but mouse on USB work well. When I start "safe" boot option system work well. What I can to do ? What I must change
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May 7, 2010
I can normally connect to most wifi connections, but for some reason I can't connect to my broth's-gf-parent's network. Windows 7 can connect to it just fine, but not Ubuntu. Once in a while I'll go to a cafe, and this will happen there too.hough, like I said I can normally connect to all other wifi networks with no hassle
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Nov 23, 2010
Let me start by saying that I am new to ubuntu, and that I always use forums as a last resort.
I installed ubuntu 10, and immediately after the Wifi card deected my network name, and actually connected to it, but then I opened up firefox and....no internet.
Since then I have been trying to fix this problem, and after some research I found out that my card (PCI Cwp-905) is RT2760 based, and I downloaded the linux RT2760 drivers for it.
The driver folder contained a readme file with commands you should enter to install it, and other setup files.
The problem: every command I typed in didn't work. I tried "make", and then "sudo make", but just got permission denied each time. I am now at a dead end. (Please note that I changed my directory to the folder location before doing this)
Does anyone know what I am doing wrong? If you want I can attach the driver files.
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Mar 4, 2011
i noticed today that the last three places ive tried to use wifi at (a friends house, my cousins house, and my moms office wifi) refuse to connect, even after triple checking all the passwords and trying various security protocols (WEP 40, WEP 128, etc.). strangely, last weekend i was able to connect to a hotel wifi signal with no trouble. even stranger, my ipod touch is able to connect to all these places. at my friends house, we even tried an ethernet cable but ubuntu didnt even know it was there. im a little concerned about this, as i might need to connect to wifi for something really important and ubuntu wont cooperate.
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Mar 2, 2010
Got an Edimax 7717un USB dongle for my Acer aspire 6930 (built-in WiFi is broken). It finds access point OK, but fails to setup with DHCP. If I put in manual IP config, I can ping OK, but I cannot browse web (or even my router's setup page). I get same behaviour on a home brew desktop.
With manual IP config, ping to my router works fine (and very fast, as does ping to 2 or 3 internet web sites. I can traceroute to internet web sites OK as well. With web browsing, if I wait a few minutes some bits of the page may arrive. With connection set to DHCP, Wicd shows WiFi connecting OK, but DHCP setup times out.
[Code]...
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May 19, 2010
I have my internet connection via a wireless USB adapter and that works fine. Recently I connected my pc (Ubuntu 9.10) through a wired switch to my modified xbox so I can watch my videos in my office. I can share my content with my xbox (except for the items on my external USB HD's - I am working on that and will post that question elsewhere) but when I have my PC's wired connection plugged into the switch I can not surf the web or check email. It gets stuck at resolving host and then times out. If I disconnect the pc from the switch it sometimes connects before it times out. Usually it is quicker if I reboot without the wired intranet connection.
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Jun 20, 2010
I recently installed Xubuntu 10.04 on my desktop computer that had a USB wireless adapter DLink DWA-140. I didn't have to install any additional drivers to get it to work. I put in the network SSID and the password and was connected immediately. However, when I try starting firefox it doesn't load any sites. Can anyone help me in approaching this problem. I have a DLink DIR-655 router. If I should gather more information to get this problem solved then please let me know and I will do so.
Edit: Now I am unable to connect to the network. When I click the network icon in the taskbar, my home network is not visible while it is visible under another ubuntu computer I'm running.
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Jul 17, 2010
I bought a laptop today (Compaq Presario cq62) and loaded Ubuntu 10.04 on it. Everything has been running great, but the Wifi has been acting up. It connects to my router for a few seconds to a minute, and then stops all data transfer (although it still shows that I am connected to the internet). My other computers running Mac work fine. I took my laptop to another place with wifi, and it did the same thing.
The data transfer seems to stop when there is a lot going on. Whenever I try downloading new software, it gets to exactly 5% then stops. If I disconnect the wifi, and reconnect it works again for another minute. I may need to be walked through any terminal codes.
On that note, where would be a great place to read up on using Ubuntu (online book?)
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Aug 25, 2010
I installed Ubuntu 10.04 32-bit on an old desktop (1.5ghz Pentium 4, 20GB hard drive, 768MB RAM) a week or two ago, at the same time that I installed Xubuntu 10.04 on an even lower performance IBM tower server. The server functions perfectly and my other (Windows XP) desktop recognized it from the start, as did the Ubuntu desktop. However, I rearranged a few ethernet cables the other day without turning off the desktops and ever since my Ubuntu machine does not recognize my server, even though all of the devices are connected via ethernet cable to a linksys router and it connects to the internet without a problem. I'm a linux newbie - this is my first move away from Windows - and I don't know where to turn. Far more confusing is the fact that, when I boot from a LiveCD, the network is recognized and I can read/manipulate files on my server without a problem. Oh, and I briefly flirted with OpenSUSE KDE (not as noob-friendly as Ubuntu, so I'm back) and encountered the same problem.
Needless to say, booting from the hard drive is preferable to booting from CD every time
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Nov 11, 2010
trying to run 10.04 netbook live from a memory stick with a view to installing it on my laptop. However although I can see my wireless router and connect to it I cannot access the internet. I have tried this on my laptop and desktop with the same result. I was however able to download Seamonkey browser using the software manager....this also cannot access the internet. Both of my PC's have no problem when using XP or Linux Mint.
I have also discovered that if I piggyback, using Ubuntu 10.04, on a neighbours open wifi link I can gain access to the internet. My wifi is using WEP protection but as I said I can set the link up to the router, entering the appropriate key code, and have a good signal strength, I just cannot access a google search page.
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