Ubuntu :: Mysterious Lack Of Connectivity After Server Reboot?
Jun 23, 2010
Every time I reboot my server, it no longer connects to the internet. It is dual-homed with an internal and an external interface. Both come up. The internal connection works fine. Nothing happens on the external interface. Ifconfig shows that both interfaces are setup correctly. My iptables settings are properly restored. Forwarding is automatically enabled. For some reason packets do not go anywhere on the external interface. This has been true ever since the upgrade to jaunty I think (now running lucid).
Once I restart the external interface it works perfectly (eg ifdown eth1; ifup eth1 or /etc/init.d/networking restart). The problem only occurs after a reboot and only occurs on the external interface.
Here's my /etc/network/interfaces file:
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet static
[Code]...
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Feb 28, 2010
I am running Fedora 12 32-bit on an Intel Core2 Duo system. I just installed some recent updated, and after starting the computer, I no longer have any network access, either to my local network or the Internet.
I'm not sure what information to provide at the moment that will be helpful in diagnosing this problem.
What do people know about how I can restore network connectivity to my computer?
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Nov 26, 2015
I have a home server running Debian Wheezy ( 3.2.0-4-amd64 #1 SMP Debian 3.2.68-1+deb7u6 x86_64 GNU/Linux). I have a Realtek RTL8111/8168B NIC and an Intel 82574L. I saw while searching Google that both cards have this issue. I'm currently using the Realtek card for LAN connectivity. If I try to tranfer large files via SAMBA or have any kind of load on the NIC, my system freezes and requires a reboot in order to restore connectivity. The error message from kern.log is:
Nov 26 02:41:53 golgotha kernel: [ 5178.413329] AMD-Vi: Event logged [IO_PAGE_FAULT device=0a:00.0 domain=0x0021 address=0x0000000000003000 flags=0x0050]
Nov 26 02:42:04 golgotha kernel: [ 5188.800088] ------------[ cut here ]------------
Nov 26 02:42:04 golgotha kernel: [ 5188.800100] WARNING: at /build/linux-Tvajqd/linux-3.2.68/net/sched/sch_generic.c:256 dev_watchdog+0xf2/0x151()
[code]....
Everything runs fine until I try to do a large file tranfer or have multiple users connected.
lspci returns:
09:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection
0a:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 09)
Also, I've rolled the driver back to rtl_nic/rtl8168f-1.fw and currently have that installed, but the error still occurs.
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Apr 29, 2011
we have deployed linux Santos 5.4 server and window 2003 server. we are able to ping window server from linux but not linux server from window. all are in same network.
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May 31, 2011
In the upper left corner of my screen, under my the applications menu, there's a small square that remains frozen no matter what I do, when I click on it, it responds as if it's not there, ie my desktop or current maximised window responds instead.
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Jun 25, 2011
Wife's laptop has AR5001 Wireless Adapter laptop model is Toshiba Satellite A215
Problem : Wireless networking randomly loses connectivity and can not regain connectivity, the only apparent solution is a full power down , this is not even certain to work. The card works under Windows, she hates Windows. (I love her for this) I know it's not faulty hardware , because it will work for days on end under Windows without problems.
Things I've tried : madwifi drivers (any and all versions available) : These increase stability of the signal and seem to delay the inevitable however it still happens. When using these drivers the only option is to unload them modprobe -r then reboot then remove them again and re add them. It makes no sense why this works, and if I don't remove them prior to rebooting it will not work.
ATH5K drivers : These are pretty much junk, results are unpredictable at best, sometimes it will work perfectly for a few hours, sometimes it will not work at all. Nothing is repeatable, I can't seem to force whatever condition is causing this. rfkill does not show the wifi being blocked (hard or soft), unblocking it anyway does nothing, only way to make this work and it's iffy is to fully power down wait 5-10 minutes turn it back on and it MAY decide to work.
Firmware update : Updated the Toshiba BIOS to the latest version of the firmware 2.0 no joy here either. Same issue both sets of drivers.
Tried different distros and kernels : I've tried Mint 9, 10 ,11 ; Ubuntu 10.10, 10.04 , 9.10 and 11.04 (which is currently installed) , Fedora and OpenSUSE. All are giving the same problems. I have also tried a slew of different kernels no joy from any of them (I'm not at the computer with the issue now I will post exactly what kernel versions I've used when I have access to the machine).
Another useful bit of information, the hard switch to disable/enable wifi WILL disable it but turning it back on does absolutely nothing. The hotkey does nothing at all. The bios does not have an option to disable or enable the wireless card.
I will also post the typical lsmod , lspci , iwconfig all that good stuff when I get back to the computer in question. I'm probably just going to buy a PC card for it and give up on that one, but this is driving me insane and I would really like to see it resolved even if I do replace the hardware.
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Jul 14, 2010
When I restarted one of my servers today and actually worked directly on the system (not through SSH as usual), some weird error messages kept appearing in the console. So I checked the syslog and found several instances of the following lines:
[Code]...
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Jun 12, 2010
All of a sudden this morning my computer started making these mysterious sounds. The first sound is a sequence of three notes going up. About a minute later there is a sequence of three notes going down. There is nothing in the system tray to indicate that anything is abnormal. When it started doing it I updated, restarted, updated again, and finally restarted. I did not update again after that thinking that this is not a Windows machine, so that would not be necessary.
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Mar 23, 2010
I have an NFS client that loses connectivity with an NFS volume about once a week. The NFS client has several other volumes mounted to the same NFS server but this is the only volume that appears to have problems. It is mounted with these options: intr,rw,rsize=8192,wsize=8192
Before I start messing with the timeout options, what else could I look at to troubleshoot this?
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May 30, 2011
I have a host on ubuntu and I think I would like to virtualize my web-server. So, to be more clear I have for instance the ip 92.124.74.8 to the main server (where virtualbox will be installed). After I will install the web-server into virtualbox it will have the address 196.168.1.10
So, how can I specify on the main server 92.124.74.8 that all the requests on port 80 to be transfered on 196.168.1.10 (virtual machine). The problem is that on 92.124.74.8 I don't have access to the router/switch. Is there a possibility to make this forward from the main machine 92.124.74.8?
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May 4, 2010
Basically, I wanted to use the Bootp (PXE) protocol to boot a machine (my laptop) from my network instead of using USB/DVD boot medias to reinstall if need be. My router being a piece of crap, I couldn't setup the DHCP server to allow PXE packets. Confirmed from the manufacturer that it is not possible. Well for a $140 router, you would expect the opposite. Anyways, here I am with a small machine setup with Slack, no desktop environment (only CLI) and connected to my router (which I deactivated the DHCP) so the machine can act as a DHCP server. It works very well. However, I would like to install a few other utilities into that machine and for them to work, I need to put the machine between my cable modem and my router. Basically, here's the topology from outside):
Internet (ISP) --> Modem --> DHCP machine --> Router (no DHCP - acting as a switch) --> computers & printers
The problem is that I cannot connect to the modem from the computers on the network. Also I cannot access the internet (go on the WAN side) from the computers. From the computers (namely my laptop), I can ping the router, but cannot ping the interface where DHCP broadcast. Also I cannot ping the modem. From the router (using the web config page), I can ping the DHCP broadcast. From the DHCP machine, I can ping the modem. In the DHCP server, I setup the eth0 (the interface where the modem connect to) as a DHCP assigned IP so it can obtain the IP from the modem. The eth1 (the interface where DHCP broadcast) is static. All my machines obtains a IP from the DHCP machine without a hiccup.
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Jan 21, 2011
I have Ubuntu 10.04 x86 installed, trying to get teamspeak 3 beta30.I have followed this guide: http://robert.penz.name/296/howto-in...u-10-04-lucid/
And can not get my network setup correctly to allow people to connect externally from my LAN. I have forwarded every relevant port I could find to the computer hosting TS, I forwarded them first as their respective protocols, and then as the combined UDP/TCP. I tried Forwarding single port numbers, and then port ranges.I have also tried uninstalling selinux.I have tried connecting directly to my cable modem with the server.I had this working perfectly three months ago with all the same software, using the same guide I listed above.The only thing I can imagine has changed is my operating system itself with system updates.
My network looks like:
Comcast cable modem--->Netgear WNR3500L Router----->Ubuntu 10.04 x86 desktop edition
what else I could possibly check? I can connect to and manage the TS server fine using localhost:9987 or 192.168.1.x:9987, it just wont allow any connections from outside the network.
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May 15, 2011
I've been dual booting Ubuntu based distros and Windows 7 x64 for a couple of years now, but since installing Ubuntu Natty I've been experiencing a strange problem. Every time I reboot from Ubuntu and load Windows, Windows will always crash and reboot shortly after reaching the desktop. This even happens in Safe Mode, but if you simply reload Windows after the crash it works perfectly. The only error report in the event viewer is a kernel-power one stating that the system shut down unexpectedly. I'm not even getting a BSOD.
This only started happening after installing Ubuntu 11.04, but even so I thought this must have been a coincidence up until now. However, after a lot of testing it really does only happen after rebooting from Ubuntu. If I load Windows from GRUB straight after switching my PC on, it works fine. If I reboot Windows after this and boot straight back into Windows, it works fine. I can only assume that Ubuntu is doing something weird to the Windows hard drive without appearing to mount it.
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Jan 23, 2010
I came up on RedHat. While I thoroughly embrace Ubuntu now, I miss the concept of runlevels. I installed all my CentOS servers with Gnome as a convenience on tap when needed. I boot them to runlevel 3 and open a vnc shell if i need gui. Then kill the vnc thus killing the gui. Just a fantastic compromise for me.
SOooo...how to replicate this behaviour in Ubuntu?
NOT a very broad topic on here that I can see. Anyone doing this? How?
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May 7, 2010
I am attempting to use putty in Karmic 64 bit - but on clicking open I get to a shell which I cannot type anything into;
Anyone know how I can enable typing into this shell?
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Jun 24, 2011
It's a long long story how I got to this point but I'll save that for later. Ubuntu says subAir does not work due to lack of SSL support. That's only one reason why it doesn't work. I've gotten past that and a few more issues. Here is what I've done: Used stunnel to get around the SSL issue.stunnel -c -f -d 127.0.0.1:8080 -r streaming.one.ubuntu.com:443
subAir still will not work and return a 403 because it wants to do a GET /I got around that two ways. One was a reverse squid proxy and another was an Apache proxy. Ok, now we're cooking. Except now subAir is sending POST data to the subsonic server and ubuntu's version does not seem to like that. Try it yourself
curl -d "c=myapp" https://streaming.one.ubuntu.com/rest/getIndexes.view -v
curl https://streaming.one.ubuntu.com/res...s.view?c=myapp -v
sigh.... so here I am thinking about writing a POST to GET 'thing' or maybe we can get some more info on how ubuntu's subsonic api works.
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Nov 19, 2010
A folder called "file:" appears periodically in my home directory.It contains an empty mirror of my home partition's directory structure down to my user folder, under which is an empty Desktop folder. Deleting it causes no obvious problems. My home partition has an XFS file system and I think this is somehow related to that since I've never seen it on an ext3 home partition.
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Jan 9, 2010
Little explanation: OEM HP pcs come with an HP_RECOVERY partition which contains an installer which will wipe the HD and install vista (shivvers) Now despite how much I looooove vista, I was wondering why the OS_TOOLS partition shows up in places and recovery doesn't... especially cause niether have a hidden flag...
(As a side note, what the hell does OS_TOOLS do? google yields no answers)
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Jan 18, 2010
I've trolled the forums for about 30 mins or so already looking this up, but can't seem to find any solutions. Most threads seem to end with either a "report to launchpad" or they just end without resolution. So in case I've missed a solved thread:
Plugging my Kodak C503 in gives inability to mount due to lock issues, the infamous -60 lockout. However, I get TWO icons in metacity, neither are mounted/will mount. Turning the cam off removes both, and I can't get down to only one. Not sure if this is because it's reading the camera's internal memory + my SD card.
So, I pulled the SD card out, and jacked it into my card reader in my lappy. no dice. In fact, none of my SD cards work; leading me to believe I need to find drivers for it.
Notes: (1)It's a Pavillion ZD7000 (2)nothing pops up in fdisk (3)I really don't want to load up windows
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Jul 17, 2010
i remember back a few years ago you could partition the drive by simply sliding a slider, and now trying to install ubuntu next to xp my dad was unable to set it up. This is a big step back for the design of the partitioner. He was able to set up ubuntu 7.04 on his old computer many years ago when i was not there. He tried to set up 10.04 today and got so frustrated with ubuntu wanting to take most of his drive, that he gave up. why was the "simple slide to set space you where going to give ubuntu" taken away. he just wants to set up the space he didn't want to deal with root, swap space, and so on. he just wanted to set up a block of space that ubuntu can use however it wants. but the partitioner will not let him. this needs to be fixed. the install process must be simple to use by everyone. i do not want my friends and family getting frustrated with installing it. he was excited to try the new ubuntu till he got to dealing with the partitioner and after that he wanted nothing to do with ubuntu. the installer is the first thing they see make that the primary focus of "easy of use".
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Oct 11, 2010
How can I set my permissions so I can access my home partition? (I am the sole user.)
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Jan 26, 2011
I setup a dual boot system, with approximately 200gig planned for ubuntu 10.10. Based on the article here:[URL]..And this quote:
Quote:
# sda1 Recovery Partition, unchanged
# sda2 Windows partition, shrunk preferably from inside Windows, hopefully about 30Gb
# sda3 Primary Partition, 10Gb, file-system = ext3, in the Partitioning Section of the installer change the "Mount Point" = /
[Code]...
I assumed at that point that the "sda3" "/" would be for booting purposes. I would have to guess that I was wrong, because it is filling up very quickly. As you may be able to tell by the screen shot, "sda5", "/home" was what was assumed to be the file structure to store all of the programs and such.
I have only been running this setup for a week, and would expect to not be seeing my "boot" partition growing so quickly. Do I need to resize it? here do the standard programs that I get from the ubuntu software center install at (partition wise)? I suppose I dont mind wiping that section dry and starting over, but I would give a resize a try if possible.
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Jan 20, 2010
I've been trying to run a simple `yum update` for the last couple weeks, but it barfs before it finishes every time. For every single package it will say something similar to "('installing package libdrm-2.4.17-1.fc12.i686 needs 208KB on the /boot filesystem', (9, '/boot', 212992L))"
Here's an example of the output:
Code:
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
[Code]...
This is a machine that I recently put through several upgrades: Fedora 9-> Fedora 10 -> Fedora 12. The computer has been working well for the most part, with some minor bugs here and there. Yum updates were working just fine until this popped up.
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May 27, 2010
Just installed fedora 13. Everything is great except for the total lack of sound. I'm trying to use the onboard audio. Motherboard is asus M4A89TD. In alsamixer all of my devices are turned on to max.
Code:
$ lspci | grep Audio
00:14.2 Audio device: ATI Technologies Inc SBx00 Azalia (Intel HDA) (rev 40)
05:00.1 Audio device: ATI Technologies Inc HD48x0 audio
Code:
$ lsmod
Module Size Used by
tcp_lp 2055 0
fuse 54749 4
ipt_MASQUERADE 2208 1
iptable_nat 5420 1
nf_nat 19059 2 ipt_MASQUERADE,iptable_nat .....
When I open pavucontrol, under output devices it lists 'HDA ATI HDMI Digital Stereo (HDMI)' and 'Internal Audio Analog Stereo'. I think the correct device needs to be the the ATI SB one, but is missing from the list.
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Feb 22, 2011
I was minding my own business watching loombo and just like that the sound cut out. so I was like okay I will watch it on mega video and no such look no sound there too so I checked my ..... and that wont even load videos.so !I'm running the latest version of ubuntu on my dell insperon laptop if this helps
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Aug 25, 2010
My /proc/sys/kernel/random/entropy_avail went from 2200 to <200 after ssh-keygen. The generated key pairs also doesn't work (ie I'm asked to provide a password). Anyone knows what is the minimum before and after entropy number I should see in order to have the keys generated properly?
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Jul 19, 2011
I have a Dell XPS 15 laptop and have installed Slackware 13.0 on it. I'm not getting any sound through the speakers. I tried configuring alsa first. However, I did not have any success. Next I also tried inserting some kernel modules corresponding to sound drivers, which was present in /lib. Again, I'd no sound output.I can get sound through earphones though.I've been stuck with this problem from some time.
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Sep 9, 2009
I have one server with Jboss and Tomcat installed, I have to start these servers manually everytime I do reboot the server.How I could do to start Jboss and Tomcat automatically, when I do reboot the server?
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Mar 28, 2010
I'm having trouble installing it on a "new" computer that I found at Goodwill for $60 with no operating system on it. When I go to edit the partitions, it won't let me do anything due to an apparent lack of a root filesystem. (I know this issue has been brought up and resolved in the past, but the usual solution (going into the validation.py file) isn't working for me, as there is no line in this one that says "if not root".)
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Dec 3, 2009
I have a Toshiba Satellite L305-SP6944C, Pentium Dual Core 2.16, 2GB RAM, 160GB hard drive, DVD-RAM UJ880AS, display 15.6 TFT widescreen, ethernet Realtek RTL8101E/RTL8102E PCI Express, WLAN Realtek RLT8187, Opensuse 11.2 and KDE 4.3.1. Installation was OK and finally the wireless card is working... but I don't have conectivity bacause in the browser (Firefox) appears a message saying "the server can't be found"
I follow the howto write by Swerdna. With ndiswrapper I install the XP driver for RLT8187, KnetworkManager is in charge of connections showing both eth0 and wlan0, the wireless sign of router Dlink DIR-280 is OK, in the dialog box of network connection I put the mac address of the wlan card but I think that is not the problem.
Other thing that I missed is that I don't find boot.ini at any directory to add modprobe ndiswrapper in the boot sequence, in etc/init.d/ appears a "boot" file, is this file that I have to change to modprobe ndiswrapper??
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