Ubuntu Networking :: Wireless Exclamation Mark And Intermittent Disconnectivity?
Oct 21, 2010
I got a NetGear wireless router recently. Attached it to my Huawei (pardon the spelling) modem. I have a HP 540 laptop running Ubuntu 10.04 The wireless gets connected. But there's an exclamation mark almost all the time. Very frequently these days, the connection gets bogged down or websites just don't open at all. But the icon (with the exclamation mark) shows Active Connection. I don't know where to start looking for bugs. Seems odd. Wireless is connected, I can connect to sites, but there's the exclamation.. and sooner or later, connection goes off but the icon still stays the same with "active" label.
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Aug 19, 2010
Recently, when trying to update, a red triangle appears in the top tool bar. Here is the message in full... The repository may no longer be available or could not be corrected because of network problems. If available an older version of the failed index will be used. Otherwise the repository will be ignored. Check your network connection and ensure the repository address in the preference is correct
Failed to fetch cdrom://Ubuntu 10.04 LTS_Lucid Lynx_-Release i386 (20100429)//dists/lucid/main/binary-i386/Packages.gz. PLease use apt-cdrom to make this CDROM recognised by Apt.apt-get update cannot be used to add new CD-ROMs. Failed to fetch cdrom://Ubuntu 10.04 LTS_Lucid Lynx_-Release i386 (20100429)/dists/lucid/restricted/binary-i386/Packages.gz. PLease use apt-cdrom to make this CDROM recognised by Apt.apt-get update cannot be used to add new CD-ROMs. Some index files failed to download, they have been ignored, or old ones used instead.
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Jul 6, 2010
I can't type an exclamation mark with my keyboard. I can type other symbols that require the shift key (~ @ # $, etc) but Shift + 1 does not give an exclamation point. Here's the intriguing part: following a tip from another thread, I changed my Visual Effects setting (System > Preferences > Appearance > Visual Effects tab) from the default "Normal" to the setting "None". Immediately after doing this, I was able to type exclamation points. Problem solved, right?
experiment to make sure the Visual Effects setting was really the culprit. So I flipped my Visual Effects back to the default "Normal", and sure enough, I stopped being able to type exclamation marks. Having verified the (apparent) cause of the issue, I tried my solution of changing the Visual Effects to "None". Of course the "solution" didn't work this time (so much for my great idea) and I am left unable to type an exclamation point.
I have concluded that the fault must lie within my user's configuration (I can type as many exclamations as I want when logged in as other users).
Quote:
Originally Posted by Yarui: If you think it's something going on with your user account, you could try renaming your home folder from your name to something else temporarily.That way the next time you log in none of your config files will be loaded. If this fixes the problem you will know that it has something to do with your config files in your home folder. You could then try to narrow it down by testing out your config files in the same way one by one, if you have the patience for that.
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Mar 25, 2009
In bash, what does an exclamation mask followed by a question mark mean?
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Oct 26, 2009
I have Centos 5, Postfix version 2.3.3 on my server I can send and receive emails as normal. I sent some emails to one of our client and the email is in my sent emails box but when I contacted her she says she has't received it. I checked the server using Webmin there is a red exclamation mark next to the email.What red exclamation mark means and how can I get rid of it?
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Aug 6, 2011
Whats the red circle with an exclamation mark in it on icons mean?
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May 2, 2011
I've upgraded to 11.04 and now Evolution doesn't work right. It shows there are unread messages in my inbox, but when I click on it, it says "Error Generating Message List" at the bottom, with an exclamation mark in a red circle. When I click on that, it says "database disk image is malformed". I've uninstalled and reinstalled Evolution, but get the same message.
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Jul 21, 2010
There's an exclamation point next to my wireless icon up at the top which concerns me. I've just installed Ubuntu 10.04 yesterday - absolutely love it. The only problem is that I'm having trouble with staying connected to my wireless network... When it is connected, there is an exclamation point next to the wireless icon.
I have Broadband internet, Belkin N Wireless router, and an Acer Aspire 5741 with the wireless device built into the laptop. This normally runs fine with Windows 7, but it doesn't automatically connect with Ubuntu 10.04...
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Apr 21, 2010
I'll like to mark all packet coming from and going to an ip adresse. And I'd like to match that mark packet in an other rule. Ex :
Rule 1 : Mark all packet coming from 192.168.2.0/25 with number 1
Rule 2 : Drop all packets which has been mark with number 1
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May 30, 2010
I wanted to get away from windows, because of the helll lot of issues it gave me. I installed ubuntu in my machine, and i am facing lot of issues to activate internet. May be I am fool number one. So need some help from experts. FIrst my hardware details :-
01:00.0 Network controller: Broadcom Corporation BCM4312 802.11b/g (rev 01)
Subsystem: Hewlett-Packard Company Device 1508
Flags: bus master, fast devsel, latency 0, IRQ 16
[code]....
I have gone thru lot of websites and forums to try to enable the wireless connections. Till now I have installed the ndisgtk_0.8.5-1_i386.deb, ndiswrapper-utils- .9_1.54-2ubuntu1_i386.deb & ndiswrapper-common_1.54-2ubuntu1_all.deb. Then I was able to install the windows driver for my wireless card. But still the status is showing as disabled for the wireless adaptor. Please help to make it working.
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Jan 16, 2011
Just recently I've been having strange connectivity problems with my wireless network. The connection has previously worked fine and haven't had any problems with it. I haven't installed anything that would have affect it as far as I know. how do I go about testing the network to see where the problem lies? I'm running Ubuntu 10.10 with a Netgear WG111v2 wireless adapter and my guess is it is some strange configuration problem or a rogue application is eating up packets because the system works fine when I boot it up into Windows.
When I try to ping my router I'll usually get something like 98% packet loss. However in the output below, the network sprang to life half way through my pings so it went up to 63%. What other tools can I try to find out what's going on?
Code:
alex@obsidian:~/dev $ ifconfig
eth0 Link encap:Ethernet HWaddr 00:1a:4d:4e:03:3f
UP BROADCAST MULTICAST MTU:1500 Metric:1
[code]....
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Mar 27, 2010
Using my usb mobile broadband dongle I am able to access the internet about 25% of the time. I am able to make a connection to the '3' wireless network 100% of the time, but often Mozilla and all other applications that rely on an internet connection do not recognise that this connection has been successfully established, and give me error messages claiming there is no internet connection.
I can't discern any pattern as to whether the connection will be recognised or not. When it isn't recognised, the only solution is to disconnect and reconnect to the network. Sometimes this works and sometimes it doesn't. Sometimes restarting the computer fixes the problem, and sometimes it doesn't. I also have access to a wireless network at uni. I have no problems using this network whatsoever. Housemates using the same dongle on Windows have no problems. I'm using an Acer Aspire one, the dongle is a Huawei e220, I'm running Ubuntu 9.10. I have only recently reinstalled the operating system and have not needed to mess around with any network settings to get the usb dongle to 'work' the way it is currently.
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Sep 12, 2010
I have an old Tatung tablet pc, with touchscreen, stupid speakers and an atheros wifi card (AR5001X+). With XP, everything works reasonably well, and wifi connectivity is rock solid. I know I'm asking for trouble installing *nix on this machine, but if the wireless worked, I'd be happy. However... With an updated Lucid install, I can see and connect to open, WEP, and WPA(1/2/tkip/aes/whatever) networks. I get good speeds with every network I've tried, but after a minute or two, my connection speed drops to zero, only to recover after another few minutes. A few minutes later, the wireless dies again, then reconnects....
Both the router and the tablet show that I still have a connection, and the connection speed recorded by both does not change from the 'working' condition. I get nothing in the logs (router or tablet) and no indication (aside from transfers stalling) that there's any problem. The 'network history' part of Gnome system monitor shows the data rate dropping to zero, but a network monitor applet on the gnome panel shows transmissions and (later) recieves. Reported signal strength remains constant, and seems to have no bearing on the frequency or length of the dropouts.
I've tried the stock lucid drivers, the lucid wireless backports, and madwifi (currently on madwifi) with no change to symptoms. I did think that it may be to do with scanning for networks (iwevent showed completed scans as the dropouts ended) so I removed network manager and tried static configuration with /etc/network/interfaces . The problems persited (although iwevent is now silent) and I am now using Wicd with no change.
lscpi:
Code:
sudo lspci
00:00.0 Host bridge: Intel Corporation 82852/82855 GM/GME/PM/GMV Processor to I/O Controller (rev 02)
00:00.1 System peripheral: Intel Corporation 82852/82855 GM/GME/PM/GMV Processor to I/O Controller (rev 02)
[code]....
I see nothing toobad in these, so I ran a longer test - I bash'd a while loop to ping the router, run ifconfig and iwconfig, and spit the results into files. I concurrently ran a wireshark capture. All of these contain a lot of text/data, so I've attached them here. I can't see any connection between the output of ifconfig/iwconfig/wireshark while the ping drops, but I'm no expert.
[URL]
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Dec 31, 2010
I just upgraded to Ubuntu 10.10 because I was facing internet problems with previous Ubuntu 9.04 after I upgraded it with downloaded software. And now, 10.10 connects to wireless, but shows web-page some-times and repeatedly disconnects. Earlier it wasn't reaching Internet at all. Some of the topics here helped a lot. But this intermittent internet seems not going anywhere. Wired Internet connects easily though.
I've tried :-
-disabling ipv6..... first in Firefox, then in Kernel also
-Setting DNS.....System> Preferences> Network Connections
-setting static Ip
The system still gives trouble.
My system is Asus UL20A.
Wireless:-Atheros AR9285
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Jul 20, 2010
Installed openSUSE 11.3 over an existing 'very stable' 11.2 installation and started experiencing wireless connectivity issues immediately. Network Manager would show connected 100% - 92% but I would lose connectivity to mail, browser and messenger(s). This disconnect would last less than 30 secs but would occur every 2 to 4 minutes.
dmesg reported:
[ 3663.672098] iwl3945 0000:03:00.0: Failed to get channel info for channel 3 [1]
[ 3664.101085] iwl3945 0000:03:00.0: Failed to get channel info for channel 3 [1]
[ 3664.529050] iwl3945 0000:03:00.0: Failed to get channel info for channel 3 [1]
BTW Channel 3 is the channel my wifi is broadcasting on. I've tried other channels and other computers and it is only openSUSE 11.3 having an issue. I am also using WPA2. Modifying the Global Options in Network Settings from User Controlled with NetworkManager to Traditional Method with ifup seemed to stabilize most of the issues, but I do notice occasional drops. I've also switched from Network Manager to wicd to provide some UI while dealing with this issue. Since iwl3945 drivers are now in the kernel I don't know if I should try to revert to an older driver or if there is another issue.
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Jan 14, 2011
I have setup debian lenny as router - kernel 2.6.26, iptables 1.4.4 and compiled xtables-addons 1.17 There are these rules in:
iptables -t mangle -A PREROUTING -j CONNMARK --restore-mark
iptables -t mangle -A PREROUTING -m mark ! --mark 0 -j ACCEPT
iptables -t mangle -A PREROUTING -m ipp2p --bit -j MARK --set-mark 1
iptables -t mangle -A PREROUTING -m mark --mark 1 -j CONNMARK --save-mark
iptables -t mangle -A POSTROUTING -m mark --mark 1 -j ACCEPT
Unfortunatelly if I try dowload something via router by ktorrent, then there are minimum of packets with id 1 (I find that at the last rule). There are only a few 100B packet with id 1 eventhought I downloaded a few MB with k torrent
[Code]...
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Mar 12, 2010
Every so often while browsing, DSN fails. The thing is that if I DIG the address at the command prompt the site immediatly pops in in Firefox. what I should do to diagnose the problem.
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Apr 6, 2010
I have a router which makes two ppp connections. PPP0 is my default route and is an uncapped ADSL. PPP1 is a Local Only (South Africa) account which has DNS resolving to its IP. PPP1 allows certain connections in. I want all packets coming in on PPP1 to be marked so that after they have been routed through our local servers they can go back out over PPP1. Both connections use dynamically assigned ip addresses. I want to use PPP0 to make a connection to one of our stores, but when our stores connect to us they will be using PPP1. All packets from these incoming connections will need to be routed back over PPP1.
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Dec 30, 2010
I have been running 10.10 server with no GUI for a few months without issue. I decided to install ubuntu desktop (GUI), because I want to turn it into a media server, and I'm finding that my Internet browsing fails intermittently. i.e. I can get [URL] sometimes and sometimes not. I have tried traceroute and found that I do not reach my local router on addresses that fail, and yet I get a full trace on addresses that are ok. Ping tests too.I remember from some time ago that the GUI may cause a network problem but I'm not sure.
By the way, other computers on the network can access this host through Samba so the NIC is working fine.
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Aug 18, 2010
I have a Huawei E 1550 USB stick modem and I'm trying to consistently get it working with Ubuntu 10.4. Using usb_modeswitch and wvdial I've got the device recognized as both a modem and disk drive and it seems to be working okay. wvdial usually is able to find the modem and connect and I can get online no problem. That's the good part.
However, after some amount of time (sometimes just a few minutes, sometimes hours, but it always eventually happens) the modem stops working and gets into a state where when I run wvdial it keeps looping and failing with:
Code:
ATDT*99#
NO CARRIER
--> No Carrier! Trying again.
--> Sending: ATDT*99#
[code].....
Interestingly enough, when it's in this state I am still able to access the modem, and via AT commands am able to see that it has signal, can make phone calls, and can send SMS messages! It just can't seem to dial a data connection. Now, unplugging and plugging the modem back in almost always seems to solve this problem, only for it to fail randomly at some undetermined point in the future.
Why can't I just keep unplugging and replugging the modem, you ask? Because the computers (yes there are currently 9 computers and modems I need this to work on) are being deployed to clinics and offices in rural Africa where they will be locked in a box so they aren't stolen. I have pursued ways to shutdown power to the USB port in order to "fake" a hard pull of the cord in software, but haven't been successful so far. I've also tried reading as much as I can on the NO CARRIER response, but so far it's not turned anything up.
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Nov 7, 2010
I've got UNE 10.10 installed on a Samsung N150 that uses the RTL8192E for wireless. When the wireless works then it generally works okay, but I'm having problems with reboots and long-running connections. This is different to the mass of posts (mainly from 2009) about the card not working at all, so I started a new thread.Basically, 90%+ of cold boots result in a successful wireless connection, with Network Manager remembering my WPA password.
When the wireless is up then it never obviously drops out, but I've got an app with a long-running connection that seems to disconnect itself occasionally. Looking at Wireshark then it appears that there are a number of retransmits, and a big batch just before it disconnects (which implies that the app is dropping its connection because it thinks the other end disappeared). Running the app on another machine with a different card but through the same release of Ubuntu and the app and the same router doesn't result in retries or drop-outs.On the times when a cold boot doesn't successfully reconnect then it asks for the WPA password, then continues trying, then asks for the WPA password again, then continues trying, then asks...and so on until I rmmod and modprobe the driver.
I originally had problems with the machine refusing to restore after a hibernate/suspend, but this was solved by a tip to rmmod the driver on hibernate/suspend and modprobe it on restore.The wireless will now work okay on some restores, but is more likely to repeat the behaviour described above for the failed cold boot.
Code:
$ lspci -nn
...
05:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8192E Wireless LAN Controller [10ec:8192] (rev 01)[code]....
Attached is a file with some snippets from dmesg around the time of the wireless failure, and the log of what it does after a remove and re-add for comparison of the "correct" messages.
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Nov 10, 2010
To be brief, I am having intermittent connectivity issues with a wired connection to a WRT54G2 router. I have no such issues if I am plugged straight into the modem. My wireless persists throughout the outages and they usually require me to restart the interface on my machine. I have used Wicd Network Manager and Ubuntu's out-of-the-box Network Manager.
hostname -rs
Code:
Linux 2.6.32-25-generic
ifconfig eth0 .....
Capabilities: pm bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
Configuration: autonegotiation=on broadcast=yes driver=e100 driverversion=3.5.24-k2-NAPI duplex=half firmware=N/A latency=32 link=no maxlatency=56 mingnt=8 multicast=yes port=MII speed=10MB/s
Resources: irq:20 memory:feafe000-feafefff ioport:ac00(size=64)
No errors in dmesg.
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Oct 28, 2010
i have just installed 10.10 under wubi, first time trying to use this network card under ubuntu. works fine on XP where it connects with good signal strength to a zyxel p-600 b/g router (my 3 other machines also connect fine to this router)
i am using WPA2, it takes 30secs to 1min to connect in the first place, then runs slowly and with intermittent disconnects, reports good signal strength in network manager.
i have been fortunate enough to have 3 machines that run ubuntu flawlessly out of the box..
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Apr 3, 2011
In the last week I have noticed that sometimes my Mobile Broadband connection just goes off without me doing anything! I have credit on the dongle account, so it isn't that. I'm using fedora 14 on an acer aspire one netbook. Dongle is a Huawei E160 on o2 here in the UK Kernel is 2.6.35.11-83.i686.fc14
Sometimes unplugging and replugging the usb dongle works. Othertimes, I have to leave it out for several hours. It does seem to happen daily, though.
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Mar 31, 2010
I'm having problems with my internet connection; it seems to be working fine then every other click of a page there is no connection, then I click it again a second later and it works. I am using a wired network connection plugged into an addon wireless router.
When I use ping under network tools it seems to be fine, then freezes halfway through and doesn't receive those few packets, giving me a transmission percentage of about 70%.
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Feb 25, 2011
I have set up one of my linux box as link load balancer for two ADSL connection. After deployment, I have found out that instead of being fast, it has become slow. What I have observed that my request get out to internet but comes back intermittently. Is this a standard scenario ?
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Jan 15, 2011
I have a Windows 7 professional x64 pc that intermittently fails to resolve host aliases. The nameserver is a Fedora 11 system running bind 9.6.2-p2. Its cannonical name is trixter.intranet.org, and it serves several web sites, each with a different host alias: hg.intranet.org, svn.intranet.org, bugzilla.intranet.org, etc.
Occasionally, the Windows pc will be unable to find any of the aliased hosts, even when it can find the canonical name. The aliases will be un-resolvable for a period of several minutes, and then, with no intervention, they can be found again. Trixter can always resolve the aliases to itself.
Even stranger, when I use Cygwin from the problematic Windows 7 PC, it CAN resolve the hosts. I can ping hg.intranet.org from a Cygwin shell, but not from a cmd.exe window. Administrator privileges make no difference.
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Jul 31, 2010
I have a Dell laptop with a bcm4312 wireless card. Every once in a while though, the laptop is unable to send or receive any data for 30 seconds. The connection is not dropped, and nothing shows up in any system logs. Both the wl and b43 drivers have this problem, but it works fine under vista.
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Jul 17, 2009
I'm having a bizarre problem where my network connection stops working randomly. At first I thought it was a DNS issue since Firefox simply chilled out on "Looking up [hostname]" until it timed out, but after further investigation (pinging IP's, "host" and "dig" being unable to reach servers) it became apparent that I couldn't even access the DNS servers i.e. the Wicked Connection of the East was most sincerely dead.
There are two strange things about this: one, there are no errors except "timeout". The network manager is happy, Firefox is happy until the lookup fails... Two, the failures only start *after* DHCP configuration. DHCP configuration never has any trouble sending or receiving packets. I'm going to try static IP and whatnot to see if that helps, more information later.
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Mar 1, 2010
When I'm not connected with the LAN, I have no problem, but when I'm connected the PC frozen in the first boot. Maybe is something related with Firefox, or some specific site (I think gmail). I have many tabs opened, then when I start Firefox they all opened. The first thing I do is read my emails, so I access gmail.
I'm not sure if it is related with Firefox or Gmail. I'll do some tests, like:
1- start the PC and don't use Firefox in the first minutes.
2- start Firefox and don't access gmail
What I think it is interesting is that it only happens once. Well, this is a good thing. There's also an exclamation sign in the Ubuntu tool bar saying "Crashing report detected"
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