Ubuntu Installation :: 10.04 Has Shut Down All Network Communication?

May 1, 2010

I upgraded to 10.04 yesterday and Firefox, or rather something I don't know that's replaced it called "Namoroku", worked fine. Today Firefox won't work and Thunderbird and Evolution won't work, either with wifi or with a direct Ethernet link. When I did the System Test, it claimed that the internet connection was fine, but I can't get anything in or out. This is on an Acer Aspire One that I have configured as dual boot with Windows 7. Under Windows Firefox works fine on the wifi. I haven't checked on the Ethernet connection, but assume it works if the wifi does.

Ubuntu also tells me that my battery is "broken", although that's a lesser problem. I can ignore that. Windows has no problem with the battery, either.

Here's the sudo lshw -c net output...

description: Ethernet interface
product: Atheros AR8132 / L1c Gigabit Ethernet Adapter
vendor: Atheros Communications
physical id: 0


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Red Hat / Fedora :: Multiple Interface On Network Using Same NIC For Communication

Apr 6, 2011

My setup is as follows,
- Two network interface cards on same network with different MAC say MAC-1 and MAC-2
- IP and
- Firewall IP tables empty iptables -F
- One NIC with IP
- both machines are connected to common switch and can ping happily.

when I send ping request from Machine-2 to Machine-1 arp tables are initialized for IP MAC pair. Surprisingly both IP are get resolved to one MAC i.e MAC-1. general observation is, MAC of first interface which has route in kernel route table. I cross checked this on Suse11 and RHEL5 same result. but In suse10 I am getting expected behavior [i.e IP1-MAC1 and IP2-MAC2 pair in arp cache]. Do any one know why kernel is using same NIC for two different interfaces?

Output for Suse11 and RHEL 5
Code: ? ( at 00:0c:29:34:e7:6f [ether] on eth3
? ( at 00:0c:29:34:e7:6f [ether] on eth3 Output for Suse10
Code: ? ( at 00:0c:29:02:9a:7c [ether] on eth3 <-------- Suse 10 machine-1
? ( at 00:0c:29:34:e7:6f [ether] on eth3
? ( at 00:0c:29:02:9a:72 [ether] on eth3 <-------- Suse 10 machine-2
? ( at 00:00:0c:07:ac:07 [ether] on eth3

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Fedora X86/64bit :: Running F11 I586 On Laptop / System Shut Off (not A Normal OS Shut Down, But A Sudden Power Off Without Warning)?

Oct 13, 2009

Offlate I installed F11 i586 on my laptop. F11 shares the hard disk with Vista Home Premium 32-bit. The problem is that when running F11 (or even Ubuntu), my system shut off suddenly(not a normal OS shut down, but a sudden power off without any warning). This could have been a hardware trouble(heating) but it doesn't happen with Vista.
Machine specifications:
Maker: Toshiba
Model: Satellite L305D-S5881
AMD Turion X2 Dual Core Mobile Processor RM-70
3072 MB 800 MHz SDRAM
I don't want to open up my machine unnecessarily, if it isn't a hardware issue.
I am not sure how to verify the bit length of the machine and the OS and does it create a compatibility issue ?
Your advise would be highly appreciated.


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Fedora :: Wanted To Shut Down The System.waited But Not Going To Shut Down?

Nov 20, 2009

I installed Fedora 12 and after I wantd to shut down the system. I waited but fedora not going to shut down. I got black screen with Power Down

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Ubuntu Installation :: Laptop Randomly Shut Down During Installation

May 16, 2011

Ubuntu was working perfectly fine, then I used the Update Manager to update ubuntu, but my laptop randomly shut down during the installation (which my laptop has never done before and hasnt done since). When I turned the laptop back on, and booted Ubuntu, a white box appears in the middle of the screen but rather than asking for my login details, it just says what I named my computer. I am unable to move my mouse or type anything on my keyboard at this stage..

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Ubuntu Installation :: 11.04 Unable To Shut Down?

Apr 29, 2011

I upgraded to 11.04 (loving it so far) and just toying around with it a bit. However, whenever I try to shut it down or restart it takes an abnormally long time. Unfortunately I have not waited long enough for it to shut down properly (waited 10 mins) and it still hasn't turned off

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Ubuntu Installation :: Computer Doesn't Shut Down

Dec 28, 2010

I have installed Linux Mint 10 on a HP Pro Book 4720s, see here: [URL]

After the installation I wanted to shut down the PC and used the button in the menu. Then appears the Linux Mint Screen and nothing happens.

I could just shut down the PC by pressing the power button for a few seconds, but that isn't a solution.

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Ubuntu Installation :: How To Shut Off 'auto Ethernet'

Jan 17, 2011

After so recent updates, I find the network connections has changed.

I see now that it connects to the network (dsl) by default. I unchecked the box 'connect automatically', yet it still is connected by the time the monitor turns on when awakened from sleep or hibernation.

How can I get the auto network connection turned off without physically pulling the plug?

I'm running 10.10 Ubuntu desktop edition

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Ubuntu Installation :: Computer Shut Off During Upgrade?

Aug 2, 2011

Last night I decided to upgrade to Natty Narwhal 11.04 from MM10.10. I tried to leave it to install overnight.

Some bright spark turned off the power supply to my computer.

I don't know exactly what stage the installation was at, but it must have been installing the upgrade at least, because I'm now locked out of my computer.

Boot up progresses until the ubuntu loading screen. At this point is says,

'Ubuntu 10.10'

The disk drive for / is not ready yet or not present Continue to wait; or press s to skip mounting or M for manual recovery.

(If I press 'S', it says something like 'cannot find /tmp folder')

I don't know if the upgrade installation was completed, but I suspect not, because the power was turned off just an hour into the installation. Also it still tries to load Ubuntu 10.10.

Anything I can do besides formatting for a fresh 11.04 install? If only to save some files?

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Ubuntu Installation :: 9.10 Won't Fully Shut Down After Kernel Update ?

Feb 14, 2010

Ubuntu 9.10 on my dual boot HP laptop won't shut down completely (my screen goes blank but the laptop doesn't power off just hangs with no screen display showing anything). I never had this problem before. It appeared after the 2.6.31-19 update.

After I push the power/reboot button and then restart the laptop, I am able to shut down.

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Ubuntu Installation :: On Shut Down Hard Drives Offline?

Mar 13, 2011

I installed Ubuntu 10.04 in a Raid 0. The install went fine. When I shut down my machine then boot it back up it shows no raid volumes defined and my hard drives as offline. Then the Disk boot error message. I am new to Unbuntu and I am sure the solution is simple I just need to know what to do.

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Ubuntu Installation :: Software Center Won't Shut Down Properly?

Apr 11, 2011

I'm runnning the Desktop x64 version of Maverick on my Laptop, and every time I use "Ubuntu Software Center" I have to 'kill' it with either the command line or System Monito

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Ubuntu Installation :: Acer Aspire 5610 Random Shut-off

Apr 22, 2010

I have an Acer Aspire 5610 and since installing Ubuntu 9.10, the computer tends to shutdown by itself while I'm using it. Does this happen to anyone else? I would like to know what's causing this so I can either fix/solve it. I never had this problem on Ubuntu 9.04, 8.10 or 8.04. Checking the system log file viewer hasn't given me any clues to what's causing this. I just know the issue started when I installed 9.10.

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Ubuntu Installation :: Automate Shut Down Computer After Cron-apt Job Finished?

Jul 9, 2010

Hopefully a simple question but one I have had a hard time finding:I am using cron-apt to automate updates as follows:

graham@graham-desktop:~$ sudo cat /etc/cron.d/cron-apt


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Ubuntu Servers :: Machine Shadowing Crashes With Message "The Connection With Remote Server Was Shut Down, Please Check Your Network Settings And Try Again."

Sep 5, 2010

I am using debian testing on my office pc, but i need to access it's desktop from time to time. So i need No machine/teamviewer software that can provide me with possibility to interact my desktop. The problem is, that i want to run shadowed session type, because teamviewer is not good for me. So, when i run no machine in shadowed mode, it crashes with message "The connection with remote server was shut down, please check your network settings and try again." The log is here:


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SUSE :: PC Shut Off In The Middle Every-time During The Installation?

May 20, 2010

When I install Crossover Linux 9.0 Pro (from 2010) onto OpenSuse 10.2 (2k6), why does the PC shut off in the middle every-time during the installation? The motherboard gives a long beep too. Works fine when I don't install anything.

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Ubuntu :: HP Psc 1300 5012 Communication Error?

Jan 13, 2010

Just installed Ubuntu 9.10 after vista I never want to go near windows again, I want to make it clear I am a complete novice at this, wouldn't know what a command line was if it jumped up and bit me on the bum, let alone how to edit one.

Installed an HP PSC 1300 all in one printer, system sees it, installs it without any trouble, as soon as I try to print it just hangs there in pending till it defaults and I get communication error 5012, also the message /usr/lib/cups/backend/ hp failed.

I have removed and re-installed the printer and the latest version of hplip more than once but am getting nowhere, the printer and cable work fine when attached to my laptop which is running xp until i learn more about Linux.

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Ubuntu Servers :: Slow Communication With Server Using SSH?

Feb 15, 2010

Today I installed Ubuntu server 9.10 on my old sony laptop with 512MB of RAM and 2.4GH celeron CPU. I hooked up my server to the router(D-Link) using cable. Now I try to upload or download data(mostly my music) to the server the speed is no higher than 500-700 KB/s. Although at first it used to be around 1.2 MB which is still considered to be low, but is there anyone who knows what I should do? By the way, I use SSH on Ubuntu 9.10 to connect to my server.

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General :: Serial Communication In Between VM And ESX?

Apr 28, 2010

I am in verse to understand the serial communication between guest and host.I have just added a serial port through VI Client selecting "Use serial port on host"(host being ESX host).If I am on VM and run :

ll > /dev/ttyS0

I understand that it should get displayed through ESX Host. So On ESX Host, I typed:

cat /dev/ttyS0

But nothing worked !

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Ubuntu :: Open The COM1 Port To Do Serial Communication Via PHP?

Mar 15, 2010

Not really sure where to post this, so here goes... I installed apache2, php and MySQL via LAMP and everything seems to work fine but when I try to open the COM1 port to do serial communication via PHP, I get a permission denied error.

'mode com1: BAUD=9600 PARITY=N data=8 stop=1 xon=off';

I've also tried using /dev/ttyS0 instead of COM1: but no luck. Anyone out there know what I'm doing wrong? I don't know if I need to set something up in apache2 or php or if the code is just wrong. I'm on an Acer Aspire One with Ubuntu's LNR 9.10.

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Ubuntu :: Communication Between Client And Server When DHCP Is Enabled?

Sep 28, 2010

I have an embedded device which acts as a client, and a server at office. The IP address of the client is allocated by DHCP, so its IP address is actually variable. I would like to know what is the simpliest way to maintain the communication between client and server when DHCP is enabled. I once used socket many years ago to communicate between the client and the server. If I remember it right, I actually bypassed the dynamic IP issues by using the computer name to replace the IP address. Even the client is not at the same local network as the server, the scheme still worked. Correct me if my memory cheated me. if socket is still the best solution for this kind of application involving DHCP? I also heard from someone that it is necessary to implement multicast discovery protocols named BONJOUR, but I don't think it is necessary

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Ubuntu :: 11.04 Sees Wireless Card / Connect To Net But No Communication

May 20, 2011

I have just installed Ubuntu 11.04 on a new computer which also has Windows XP installed. This computer is connected to the internet via a USB Zonet ZEW2590 802.11N wireless card with the Ralink RT3070 chipset. Ubuntu sees the wireless card and it connected to my wireless router without any problems. When I look at the connection information it says the wireless card is connected at 24mb/s and one time it said it was connected at 54mb/s. The problem is that when I go into Firefox and type in a url (such as www.yahoo.com) I see a message at the bottom of the screen saying "Looking Up Yahoo and then it does nothing for several minutes. Then I get a pop-up box that says "Server Not Found".

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General :: I2C Communication From Kernel Space?

May 11, 2011

How do you interface with the Linux I2C driver from kernel space? For example, if I had LEDs connected to a GPIO expander on the I2C bus, how would I blink them twice before going down for reset from machine_reset()?

Essentially, I believe I need to call the functions i2c_smbus_write_byte(), i2c_smbus_read_byte(), etc. But these functions require I2C client data that I do not understand how to supply.

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General :: Signal Communication Between The Processes?

Sep 20, 2010

I am writing a code which communicates between 2 processes created by fork() statement. Parent reads a file and write the data into a shared memory and sends a signal to the child. The child then receives a signal from the parent to start reading. After finishing the read operation the child sends a signal to the parent asking it to resume its action. Some things are going wrong in my code.

1. segmentation error in memcpy() statement.
2. terminal hangs after running the code.
3. Synchronization problem between processes..

Code: #include <stdio.h>
#include <sys/types.h>
#include <wait.h>
#include <unistd.h>


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Programming :: Communication Between Bash And Firefox

Aug 24, 2010

I have been able to use bash to initiate a google seache via firefox. I would like to either copy the source page to a file via wget or send firefox short cuts to the other terminal's firefox search page to put the html file in a directory. I seem to remember but maybe incorrectly that there exist hexadecimal codes for each keyboard shortcut in firefox. Maybe these could be echo-ed from bash to the firefox search page.

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Hardware :: How To Switch To Communication Mode?

Aug 3, 2010

I'm running Fedora11 OS on my desktop.my HSPA USB modem(Prolink PHS101 HSPA modem)is not detected as communication device. it detected as a CD ROM. could you please tell me the way to make functioning of it in Fedora 11 how to switch to communication mode.

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Networking :: Communication Without Loopback Device

Jan 13, 2010

I have two ethernet card on my computer, I want to make a TCP or UDP communication between these two cards, so I disable loopback: #ifconfig lo down. but with out loopback I can't even ping an eth from another one. how should I do? I want traffic to really pass eth cards.

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Networking :: Get The USB Server 'LANSER-E1' From 'MRT Communication'

Jan 21, 2010

Has anybody tried to get the USB server 'LANSER-E1' from 'MRT Communication' working in Linux ? It works OK in Windows but I have failed to get it working in Debian Sid.

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Networking :: DMZ - No Communication Between Server And 2 Clients

Oct 28, 2010

Server--Router0--Modem0 ISP2--Modem3--Router3--Client3
Client2--Router2--Modem2 ISP3--Modem4--Router4--Client4

The Server in the above diagram can be accessed by Client3 and Client4 but not at all by Client1 or Client2. Router0 specifies the Server as a DMZ Host. I would be more specific but this is not my server. I don't use a DMZ, I forward ports when they are needed. In this case I represent ISP1 and the server belongs to a befuddled client. Client1 & Client2 can send packets to each other, no problem. Could the DMZ be breaking communication between the Server and Clients 1 & 2?

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Server :: Communication Between Apache And Resin?

May 16, 2010

I was going to upgrade apache from version 1.3 to version 2.2.15 on a test server (and later on prod servers).. i prepared really good for it by reading upgrading information, changes from 1.x - 2.x, read module documentation to check if any of the used modules had any different syntax and if it was supported for this new version of apache. Later i finally installed apache, upgraded all the used modules to be apache 2 compatible and everything seemed to go smooth. I started apache and resin and everything looked fine, the syntax was OK and everything so i reported back that it was ready.. but i got a feedback that the people that were going to use the server only got a proxy error or service unavailable error when apache was trying to send requests back to the backend resin server.. and this is the problem. I could just have told you that this was the problem, but i find it to be much easier if you have a little background information first to explain how the problem aried.

A couple of other people and myself has done quite extensive troubleshooting on this, we troubleshooted apache, mod_caucho and resin by themselves to check if it was any problems with them.. we could only find that mod_caucho didnt seem to behave correly, the caucho-status page was displaying an empty list of requests and what would be proxied back.. we are running the same version of mod_caucho and resin to be sure it would be compatible with eachother and all the software is running in 64-bit, only a 64-bit CentOS 4.4 OS (yes, the OS is really old but because of complications we are not ready to upgrade it yet).

When we try to telnet to the port where resin is listening its open and resin returns an X when you hit enter (like it should and says in Caucho' official troubleshooting tips). We have tried installing apache 2.2.11 instead of 2.2.15 and other versions of both resin and mod_caucho. Other modules has also been tried like mod_proxy to send the requests back and also the rewrite module with the P flag.. although this was not the preferred way to do it we only wanted to see if it had any difference which it didnt.

So after several hours of troubleshooting we are still not able to find the cause of why we are getting a proxy error (http 502) when apache is trying to send a request back. We have checked all the logs for apache and resin, we have also compiled the mod_caucho module with the "--enable-debug" option to get more verbose information but we didnt get any additional information this way eventhough we should according to Caucho' official site.

We have looked into both the resin and apache config and tried both ways of configuring mod_caucho.. and nothing seems to change the result.. we only get a 502 proxy error. So since it didnt work i downgraded to apache 1.3 one day and that was fine.. then it was upgraded again to apache 2.x to try to find out what the problems were but again we didnt find this.. so i was going to downgrade it again, but this time on a different test server, but after downgrading i for some very weird reason got the same proxy error i had when using apache 2 which is beyond my comprehension.. i just cannot understand this.

- has anyone had any similar experiences with or without the same setup ?

- does anyone know about any solution to this of can provide any additional advice on what to do further? Yes, we want the functionality in apache 2 so we will not settle with apache 1.3.. one of the features being the new filters to be able to capture requests for pre and post processing before they hit other modules.

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