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• Wired connection problem through router

  - by tommypincha

  I'm having trouble to connect my Ubuntu 11.10 to internet through ethernet. I installed a router to get Wi-Fi and now (by a wired connection) I can't have internet with ubuntu (but I can with Windows 7). I see several attempts per minute of the network-manager to get a connection, but after a minute it stops trying. Here are a couple of outputs from key files: cat /etc/network/interfaces auto lo iface lo inet loopback and ifconfig -a eth0 Link encap:Ethernet HWaddr 00:16:76:e4:a6:e8 inet6 addr: fe80::216:76ff:fee4:a6e8/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:117 dropped:0 overruns:0 frame:117 TX packets:50 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:12221 (12.2 KB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:582 errors:0 dropped:0 overruns:0 frame:0 TX packets:582 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:46024 (46.0 KB) TX bytes:46024 (46.0 KB) I tried reconnecting the modem and the router and reconnecting the ethernet cable but nothing... I tried other solutions from other posts (this one has a similar issue Wired connection not working) but again nothing. My IP is dynamic. A couple of things I see and did: I see no inet addr, only inet6. I ignored ipv6 from the internet connections, and restarted the network-manager service and nothing. A difference with the post I mentioned is the RX packets with errors I have, is this a clue of the problem? Any help would be appreciated, Thanks!

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• Problems with microphone and network

  - by AnoonymoouS

  Hello... very good day everybody! I'm having some problems regarding the Ubuntu 12.4.01 LTS. For this reason, cordially i ask everyone's help. Such problems can be summed up in network (01) and audio (02)! 01) I can not set a DSL network settings in the "upper bar" (on side the clock). When i create the connection, the system says that the cables modem are disconnected! I can only use the internet if i set up a connection at terminal through the command "pppoeconf". Follows the print screen of what i mentioned above:. http://i.imgur.com/8nTrF.png Obs.: Note that even after the connection "created", it does not appear there! 02) The sound is reproduced; however, can not be captured! I can not make recordings, obviously i can't use the microphone. I believe that something is giving interference or the settings are wrong! Follows the video of what i mentioned above:. http://dl.dropbox.com/u/41085750/Projeto%20Padr%C3%A3o.mp4 Obs.: I'm listening to music, so that interference errors may appear in the video. By kindness; who can help me... help me! I sought help at various sites and forums but unfortunately, i did not get success. I wait anxiously for a direction. Regards, Anoonymoous.

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• Sending state diffs (deltas) and unreliable connections

  - by spaceOwl

  We're building a realtime multiplayer game, in which each player is responsible for reporting its state on every iteration of the game loop. The state updates are broadcasted using unreliable UDP. To minimize state data sending, we've come up with a system that will send only deltas (whatever state data that was changed). This method however is flawed, since a lost packet will mean that other players will not receive the delta, making the game behave in an unexpected way. For example: Assume that state is comprised of: { positionX, positionY, health } Frame 1 - positionX changed --> send a packet with positionX only. Frame 2 - health changed // lost ! Frame 3 - positionY changed --> send a packet with positionY only. // Other players don't know about health change. How can one overcome this issue then? sending the entire data is not always feasible.

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• Is there a way to disable a particular pci port

  - by mxdog

  I have a MB with 2 nics on it. a switch burned up and took out one of them. there is no way to turn them off individually in the bios. is there a way to turn off one of the ports. unmap it,unbind it, power it down so the system doesnt see it at after boot. they are mapped as 0000:02.08.0 and 0000:02.08.1 I want to turn the second one off somehow. Since they both use the same driver, blacklisting the module will take out both of them. Normally I would just live with it but it seems there should be a way to do that like in windows (gasp)--just disable it. I Actually have the exact same problem on another comp running XCP so this will be a 2fer if it gets figured out. the OS is 12.4 lts server with xen on it. THX

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• How do I find out which process is eating up my bandwidth?

  - by Bruce Connor

  I think I'm being the victim of a bug here. Sometimes while I'm working (I still don't know why), my network traffic goes up to 200 KB/s and stays that way, even tough I'm not doing anything internet-related. This sometimes happens to me with the CPU usage. When it does, I just run a top command to find out which process is responsible and then kill it. Problem is: I have no way of knowing which process is responsible for my high network usage. Both the resource monitor and the top command only tell me my total network usage, neither of them tells me process specific network info. Is there another command I can use to find out which process is getting out of hand? I've already tried killing all the obvious ones (firefox, update-manager, pidgin, etc) with no luck. So far, restarting the machine is the only way I found of getting rid of the issue. EDIT: (just to be clear) I've found questions here about monitoring total bandwidth usage, but, as I mentioned, that's not what I need. UPDATE: The command iftop gives results that disagree entirely with the information reported by System Monitor. While the latter claims there's high network traffic, the former claims there's barely 1 KB/s. Thanks

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• Network setup not working. Can't connect to the Internet in Ubuntu

  - by Clint Eastwood

  I want to know how to set-up network in 12.04 using automatic settings (DHCP). I installed Ubuntu, but I can't seen to see the network connection. What can I do? My notebook has no wireless only cable. The cable will not fit in. How can I plug it in? Do I need a special Cable? There is no router can I fix this myself, or should I call a technician? Also can I use USB to connect to the network/Internet? please can you help Thank you jamel

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• How should bots be recognised in a game?

  - by Bane

  I'm interested in how bots are usually written. Here's my situation: I plan to make an online 2D mecha game in HTML5, and the server-side will be done with node. It is intended to be multiplayer, but I also want to make bots in case there aren't enough players. How does my game logic see them, as players or as bots? Is there a standard by which I should make them? Also, any general tips and hints will be OK.

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• Network sharing for android

  - by Shagun

  I am on ubuntu 12.04 and I want to create a wifi hotspot to be used with my android device. Now I know there are so many tutorials available every where and that I have all options in network tab to use but I couldn't get it to work. Android does not work with an adhoc connection and whatever wifi network I created, my android device could not connect to it (I could connect a phone using bada to it and other computers can also be connected) I know the work around to get android on a adhoc connection but can't I have some thing as simple as connectify for windows? PS : I am not looking for workarounds involving android.

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• Use two networks at the same time?

  - by Christopher

  I want to use Ubuntu 10.10 Server in a classroom, a computer lab whose bandwidth is provided by a local cable ISP. That's no problem, though the school network has an IP printer that I want to use. I cannot reach the printer through the cable Internet. But, I have two network cards. How is it possible to use both networks at once? eth0 (static 192.168.1.254) is plugged into a four-port router, 192.168.1.1. On the public side of the four-port router is Internet provided by the cable company. I also have the classroom workstations plugged into a switch. The switch is plugged into the four-port router. The whole classroom is wired into the cable Internet. The other NIC, eth1, could it be plugged into an Ethernet jack in the wall? It uses the school network, and I might receive by DHCP an IP address like 10.140.10.100, with the printer on maybe 10.120.50.10. I was thinking about installing the printer on the server so that it could be shared with the workstations. But how does this work? Can I just plug eth1 into the school network and access both LANs? Thanks for any insight

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• How to get Wifi Working Properly - I am Noob

  - by user287853

  I'm a noob to Ubuntu, but not computers. I installed a full version of Ubuntu version 12 whatever it is. I run it on a machine that has Win7/Win8 on another hard drive. My wireless adapter is some tiny USB stick I got on eBay - it works great in Windows, but I can't get it to work in Ubuntu. More precisely, Ubuntu is providing me a list (sometimes) of wireless networks in the area and when I try to connect to mine it just keeps password prompting me even though the one I use is correct. I looked over all the settings multiple times and don't believe there is anything in error regarding what it takes to connect to my network. So, I thought maybe it is a driver issue and came across NDIS. I thought I should try installing it, but I don't know how when I can't connect the Ubuntu machine to the Internet. I tried some commands to no avail. I have the Ubuntu installation disc and it shows a NDIS common and utils .deb files in there. Can someone out there help me out to get this wireless setup so I can get online?

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• Best way to handle realtime melee AI in authoritative network environment

  - by PrimeDerektive

  So i've been working on a multiplayer game for a bit; it's a co-op action RPG with real-time combat. If you've seen or played TERA, I'd say it's comparable to that, but not an MMO, heh. I'm currently handling the AI units authoritatively, the server calculates their pathing, movement, and pursue/attack logic, and syncs the movement to the clients 15x per second, and the state changes when they happen. When I emulate 200ms ping, though, the client can perceive being out of range to an AI's attack, but still take the hit, because on the server he hadn't moved that far yet. This also plays hell with my real-time blocking. I don't really want to allow the clients to be allowed to say "that was out of range" or "I blocked that", but I'm not really sure how else to handle it.

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• Wifi networks will not show up!

  - by Kcahmadi

  I'm running Ubuntu 14.04 on an old '08 macbook. I've gone to system settingsSoftware & UpdatesAdditional Drivers and enabled the wireless driver. But when I click the wifi icon on the top toolbar no networks show up. When running lshw it clearly shows my wireless card under Network controller and it says the driver is installed. However, nm-tool only shows ethernet. And rfkill only shows bluetooth. What can I do?

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• 12.04 - why does the network icon dissapear every time my machine is turned off

  - by Howard Walker

  After spending an hour or two working out how to find the network Icon, I find that when I reboot the machine, I have to go through the whole procedure again. 1. The network menu is not there - so first I have to find the terminal. This has no particular location that I can find but usually I have to type terminal in the dash. 2. Then I have to type nm-applet in terminal 3. The network manager icon then appears, but only works if the terminal window remains open. Shut down the terminal window and the network disappears. This is a pain - plus I have to type my password in every time, which is another waste of time, thought this has always been a problem. So can anyone tell me how to make the web automatically connect at startup without any intervention from me.

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• ethernet doesn't work

  - by Grig Tanasescu

  I know that it may look pretty stupid, but that's it. I have a ethernet connection with my mom's computer, and is her's who's the source or anyway it is called. I'm new at linux, but i had before linux mint 13 and the ethernet didn't work 'till a friend went to network settings-options he clicked "add" somewhere and and introduced some numbers, after he looked somewhere in my mom's computer. I've tried neither linux nor ethernet until now. Please help and sorry for my english. P.S. I'm just 13 and I don't know much about computers so, please, talk to me as you would with a completely idiot. Thanks

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• Frequent disconnects using wlan AR9285

  - by John Neil

  I'm getting a large number of disconnects from my wireless when I switched to oneiric server (I did not see these happen with oneiric desktop) from my AR9285 wireless LAN device. Here is the syslog snippet: Oct 17 09:43:17 weather kernel: [ 1537.329138] wlan0: deauthenticated from 00:12:17:7a:8e:42 (Reason: 7) Oct 17 09:43:17 weather kernel: [ 1537.340409] cfg80211: All devices are disconnected, going to restore regulatory settings Oct 17 09:43:17 weather kernel: [ 1537.340423] cfg80211: Restoring regulatory settings Oct 17 09:43:17 weather kernel: [ 1537.340435] cfg80211: Calling CRDA to update world regulatory domain Oct 17 09:43:17 weather kernel: [ 1537.348571] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain Oct 17 09:43:17 weather kernel: [ 1537.348581] cfg80211: World regulatory domain updated: Oct 17 09:43:17 weather kernel: [ 1537.348586] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp) Oct 17 09:43:17 weather kernel: [ 1537.348594] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) Oct 17 09:43:17 weather kernel: [ 1537.348600] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm) Oct 17 09:43:17 weather kernel: [ 1537.348607] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm) Oct 17 09:43:17 weather kernel: [ 1537.348613] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) Oct 17 09:43:17 weather kernel: [ 1537.348620] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) Here is the relevant lspci output: # lspci | grep Atheros 02:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01) I have done quite a bit of searching and saw discussions for previous versions of ubuntu that recommended installing the linux-backports-modules package. However, this does not appear to be available for oneiric (just the headers are listed as a package). Any advice on how to achieve a stable wireless connection for this server? It's location mitigates against using a wired connection.

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• Ubuntu 11.10 is not detecting wired connection on Lenovo G580

  - by Dilip

  I am not able to see wired connection options in header menu. I can see wireless option but still It is not working. Could any one suggest what I am missing? Please find my ifconfig output: =================================== root@rails-dev:/home/rails_work/rdfnet# ifconfig lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:41944 errors:0 dropped:0 overruns:0 frame:0 TX packets:41944 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:4602835 (4.6 MB) TX bytes:4602835 (4.6 MB) ===================================

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• Connected to wireless, but no internet access

  - by boogaloo

  After installing Ubuntu 12.04 a week ago wireless internet had been working fine. It stopped working yesterday, however, and I'm at a loss for what to do even after scouring replies to similar posted problems. I have tried using Google's public DNS and turning off proxy settings on Firefox. I have used nm-tool and lshw to make sure my wireless device and driver are connected. If anyone can help me resolve this issue I would be extremely grateful! @kregerjd $ ping -c3 www.google.com ping: unknown host www.google.com @Alaa: $ route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 wlan0 169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 wlan0 192.168.1.0 0.0.0.0 255.255.255.0 U 2 0 0 wlan0 $ ping -c4 192.168.1.1 PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data From 192.168.1.104 icmp_seq=1 Destination Host Unavailable From 192.168.1.104 icmp_seq=2 Destination Host Unavailable --- 192.168.1.1 ping statistics --- 4 packets transmitted, 0 received, +2 errors, 100% packet loss, time 2998ms pipe 4

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• How to prevent WLAN connection from dropping permanently?

  - by Chris

  I have a desktop with a Fritz USB WLAN N stick and tried Ubuntu 12.04. Installation went fine and WLAN is working. However, connection drops permanent. Reconnecting manually fixes it but after a few minutes it drops again. It's connected to a Vodafone 802 box with WLAN N fix set. It seems that it works when I switch off N mode. But I need to test. Can someone confirm this issue or is there another solution? I have another machine with 12.04 (HP 625 laptop) running where connection is stable.

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• Lag compensation of projectile shooting game

  - by Denis Ermolin

  I'm thinking about an algorithm for firing projectiles with lag compensation. Now I did find only one descent solution: Player hits fire button. Client sends input "fire". Client waits for server response. Server generates bullet then sends response to client. Client recieves response and finally fires projectile. Is this solution only "trueway"? I find it the only one that can be fair to all of the clients. Valve in this case, doesn't compensate lag from rocket shots. I am feeling that I will not compensate it, too. I think that with today's bandwidth I can close my eyes on this problem, because I don't see any solutions with fair logic. What do you think?

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• Bridge Laptop's Ethernet to Wireless

  - by Kalphiter

  The laptop wirelessly connects to my router, while the desktop is connected to the laptop with an ethernet wire. The desktop successfully can use the internet if I set the connection to be shared on the laptop. The problem is, I need the laptop to forward the desktop's packets across the link unmodified, so the desktop is on the same network as the router. The desktop needs its IP assigned by the router, so that I can access it from another computer as "192.168.1.8".

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• How to change the IP address on my Ubuntu virtual NIC

  - by DextrousDave

  I have a physical windows system, on which I run Vmware Workstation. Now on VMware I run Ubuntu 12.10. I am running a webserver on Ubuntu via LAMP, inside VMware. Problem: Now my local IP address for my virtual NIC (the one Ubuntu is using) has an address of 192.168.159.7, and my home router only issues IP addresses of the range 10.0.0.x. So if I want to port forward to the virtual NIC, which has a 192.168 address, I cannot, so my LAMP webserver cannot be accessed externally since the router does not know to send the packets on port 80 to the virtual NIC... How do I fix that? The only way I guess is to assign a 10.0.0.x ip address to the virtual NIC?? But how do I do that? I tried to do it on the host Windows machine with 'Get my IP address automatically' but it issues a 192.168 address every time... Thank you

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• How to troubleshoot ethernet port on laptop

  - by Psallas Vassilios

  I have a problem with my wired connection. To be more specific, my laptop doesn't seems to recognize that I have plugged in an ethernet cable. I tried to download new drivers for my ethernet card, but I couldn't find any solutions. Maybe because I am new to Linux, so I'm not familiar with running commands in the terminal. OK I have typed the command and here are the results: 00:04.0 Ethernet controller [0200]: Silicon Integrated Systems [SiS] 191 Gigabit Ethernet Adapter [1039:0191] (rev 02) For the second reply I don't know if the following is what you asked me: ?Memory: 3.9 GiB ?Processor: Intel Core 2 Duo CPU P8800 @ 2.66GHz × 2 ?OS type: 32-bit My Ethernet connection had some problem on Windows too. I have changed recently my internet provider, and since then my ethernet cable is not recognized by the laptop. At that time I was still on Windows. I thought that with Ubuntu the problem would be solved, but unfortunately the problem still persists. If someone can help me to solve my problem I'll be thankful. Here are the results of the three first commands you told me to run: lsmod | grep sis190 sis190 22570 0 sudo modprobe sis190 ifconfig eth0 Link encap:Ethernet HWaddr 00:90:f5:90:81:7e UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:185 errors:0 dropped:0 overruns:0 frame:0 TX packets:185 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:22672 (22.6 KB) TX bytes:22672 (22.6 KB) wlan0 Link encap:Ethernet HWaddr 00:25:d3:2c:3a:ae inet addr:192.168.1.72 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::225:d3ff:fe2c:3aae/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:260 errors:0 dropped:0 overruns:0 frame:0 TX packets:363 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:71992 (71.9 KB) TX bytes:52000 (52.0 KB) and the results of running the last two commands: dmesg | grep -e eth -e sis190 [ 0.816667] sis190: sis190 Gigabit Ethernet driver 1.4 loaded [ 0.816728] sis190 0000:00:04.0: setting latency timer to 64 [ 0.816751] sis190: 0000:00:04.0: Read MAC address from EEPROM [ 0.904032] sis190: 0000:00:04.0: Realtek PHY RTL8201 transceiver at address [ 1.416030] sis190: 0000:00:04.0: Using transceiver at address 1 as default [ 1.448235] sis190 0000:00:04.0: eth0: 0000:00:04.0: SiS 191 PCI Gigabit Ethernet adapter at f8410000 (IRQ: 19), 00:90:f5:90:81:7e [ 1.448238] sis190 0000:00:04.0: eth0: GMII mode. [ 1.448243] sis190 0000:00:04.0: eth0: Enabling Auto-negotiation [ 11.560907] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [ 16.372019] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [ 16.372265] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [ 26.424038] sis190 0000:00:04.0: eth0: auto-negotiating... nm-tool NetworkManager Tool State: connected (global) - Device: eth0 ----------------------------------------------------------------- Type: Wired Driver: sis190 State: unavailable Default: no HW Address: 00:90:F5:90:81:7E Capabilities: Carrier Detect: yes Wired Properties Carrier: off

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• help download and install and save and use my wireless stick modem and software

  - by ADAM

  i installed Linux Ubuntu after my win os went totally dead by fatal blue screen. cannot reboot or install form CD ROM or get safe mode i installed Linux Ubuntu i still unable to install my wireless stick usb modem to connect and surf the Internet wireless form my provider. i use wireless network from neighborhood And i find it difficult to download and install and save porg and application from the INTERNET like skype and real player and others. it is different form windows and not that easy to use. i click to download for example and find real player but when click on it it opens as text file only and i cannot use it as it should be used for video and download and record from you tube. how to do it. and is there with Linux Ubuntu similar prog to download and record and save from you tube as in windows? Is there any trick to restart or reboot windows OS from the dead. can i use linux to reboot windows or to import my files from the blue screen stopped windows7? Any help is highly appreciated. thanks please email me to : [email protected]

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• Would a typical corporate firewall block a Java applet having the following behaviour

  - by auser

  I'm thinking of developing a proxy-like program to forward ports on a remote PC to a local PC (for example SSH). Assume that both local and remote PCs are running behind typical firewalls (i.e. consumer broadband router firewall, Windows firewall or corporate firewalls). The program will be a Java program which the user will run on both the remote and local PC. The remote client will periodically poll a central server to determine whether there are pending client connections. A session could be initiated as follows: The local client contacts the central server and request the current connection details for a specific remote client. The central server responds with the remote server's last received IP address and port. The next time the remote server polls the central server, the client's IP address and port are returned. The remote server initiates a connection to the local client using the IP address and port returned by the central server and listens for a response on a random port. The remote server will pass the value of the port it's listening on to central server. Goto 1, if client fails to connect to server. Would this work or will a typical firewall block the interactions.

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• dhcp configuration not working ubuntu 11.10

  - by Vivek Pradhan

  I am usually behind a proxy server in college so I connect to the ethernet or wifi using manual IPv4 addresses only inside college. I have been trying really hard to get the internet work at home, there is no proxy and I have set the network to use automatic dhcp. It seems like it is not able to connect to the port, It gets disconnected after some time automatically and then tries to reconnect. The same thing is happening with wifi networks also, after some time i see a pop up asking for authentication and ultimately its not able to connect. What might be the problem here. I looked up some similar questions and checked the /etc/network/interfaces file and looks like this: auto lo iface lo inet loopback I have no idea what those lines mean but there is no configuration for eth0 or wlan0. Any help is deeply appreciated. Ubuntu loses it charms due to these small glitches.

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