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  • Is it possible to print to a Brother MFC-490CW that is conected to a LAN

    - by Johan Poelsma
    I have a Brother MFC-490CW printer that is connected to my LAN (wireless) and on which I can print with fine from Windows. From Ubuntu however, it does not seem to be possible. I downloaded and installed cups and lpd drivers from the Brother site and installed them. I get a Brother printer that says it is connected via USB. If I search for a network printer, my printer is shown. If I select it and select the correct driver, I can submit test pages. These pages are however not printed. What could be wrong. Should it really be that much harder then it is on Windows?

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  • Suddely internet is not accessible

    - by user189708
    I am going crazy here. One day everything was working fine. I turned pc off and went to sleep. Next day turn pc on and cannot access internet (from any browser). The situation is: I cannot open any webpage from browser (tried Firefox and Epiphany) and cannot receive emails in thunderbird. BUT if I run firefox from console as sudo, I can use it as usual. I can access Skype and pretty much any other network stuff (like installing software with apt-get etc.), also if I use Astrill VPN software I can access webpages even running without sudo. I haven't install any software or anything like that for several days = I have not a clue what could cause this. Just by the way, other Win PC in our home has no issue. Here is what I have tried to fix this: I have tried to restart my pc, router, modem - multiple times I have tried to change permissions to my firefox profile I have tried to completely re-install firefox and start with blank profile, thus no addons I have tried to change /etc/resolv.conf to an IP of my router (it was 127.0.1.1) I have tried to change my hostname (from tomino-NB to tominoNB) I think I might try even more stuff. None of it works. Can someone please try to help me. Thank you UPDATE 1: I have tried this: Removing resolv.conf - Didn't help Also "ping" and "dig" commands cannot resolve host UPDATE 2: I have tried to edit nameservers in resolv.conf but still no effect. I can ping router as well as I can ping outside IP. So definitely just some DNS issue. Is it possible that something is rewriting path to resolv.conf and using different file? UPDATE 3: I have just restarted PC and everything works now... resolv.conf went back to nameserver 127.0.1.1 . I have no clue what happened that it works again...

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  • I have 20 Ubuntu 12.04 LTS machines Some are unable to network with other machines , they all have same workgroup viz. Ubuntu

    - by Gaurang Agrawal
    During installation I updated my workgroup to "Workgroup" , after installation I changed it to ubuntu as I was unable to access computers in network . What changes do I need to make in samba configuration ? I don't know if this is related , shared@shared:~$ testparm Load smb config files from /etc/samba/smb.conf rlimit_max: increasing rlimit_max (1024) to minimum Windows limit (16384) Processing section "[printers]" Processing section "[print$]" Loaded services file OK. Server role: ROLE_STANDALONE Press enter to see a dump of your service definitions [global] workgroup = UBUNTU server string = %h server (Samba, Ubuntu) encrypt passwords = No map to guest = Bad User obey pam restrictions = Yes pam password change = Yes passwd program = /usr/bin/passwd %u passwd chat = Enter\snew\s\spassword:* %n\n Retype\snew\s\spassword:* %n\n password\supdated\ssuccessfully . username map = /etc/samba/smbusers unix password sync = Yes syslog = 0 log file = /var/log/samba/log.%m max log size = 1000 name resolve order = bcast host dns proxy = No usershare allow guests = Yes panic action = /usr/share/samba/panic-action %d idmap config * : backend = tdb [printers] comment = All Printers path = /var/spool/samba create mask = 0700 printable = Yes print ok = Yes browseable = No [print$] comment = Printer Drivers path = /var/lib/samba/printers smbclient -L 192.168.1.108 Enter shared's password: Connection to 192.168.1.108 failed (Error NT_STATUS_HOST_UNREACHABLE)

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  • Frequent disconnects with oneiric server 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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  • Problem connecting to isp server using xl2tpd as client. Ubuntu server 13.04

    - by Deon Pretorius
    I have followed guides found on google and ubuntu support pages and can get xl2tpd connection up but only under the following conditions: 1 - ADSL model must be configured and connected to the ISP or 2 - ADSL modem in bridge mode I must have an existing PPPoe connection established. If neither of the above are active xl2tpd wont trigger pppd and connect to the isp and thus tunnel connection fails to connect to the L2TP server of the ISP. Am I doing something wrong; /etc/ppp/options.l2tpd.axxess ipcp-accept-local ipcp-accept-remote refuse-eap refuse-chap require-pap noccp noauth idle 1800 mtu 1200 mru 1200 defaultroute usepeerdns debug lock connect-delay 5000 name (name used for ppp connection) /etc/ppp/pap-secrets # * password (name used for ppp connection as above) * (ppp password supplied by isp) /etc/xl2tpd/xl2tpd.conf [global] ; Global parameters: auth file = /etc/xl2tpd/l2tp-secrets ; * Where our challenge secrets are access control = yes ; * Refuse connections without IP match debug tunnel = yes [lac axxess] lns = 196.30.121.50 ; * Who is our LNS? redial = yes ; * Redial if disconnected? redial timeout = 5 ; * Wait n seconds between redials max redials = 5 ; * Give up after n consecutive failures hidden bit = yes ; * User hidden AVP's? length bit = yes ; * Use length bit in payload? require pap = yes ; * Require PAP auth. by peer require chap = no ; * Require CHAP auth. by peer refuse chap = yes ; * Refuse CHAP authentication require authentication = yes ; * Require peer to authenticate name = BLA85003@axxess ; * Report this as our hostname ppp debug = yes ; * Turn on PPP debugging pppoptfile = /etc/ppp/options.l2tpd.axxess ; * ppp options file for this lac /etc/xl2tpd/l2tp-secrets # Secrets for authenticating l2tp tunnels # us them secret # * marko blah2 # zeus marko blah # * * interop * vzb_l2tp (*** secret supplied by isp) ^ isp server host name Any help will be greatly appreciated

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  • Multiplayer Game Listen Servers: Ensuring Integrity

    - by Ankit Soni
    I'm making a simple multiplayer game of Tic Tac Toe in Python using Bridge (its an RPC service built over a message queue - RabbitMQ) and I'd like to structure it so that the client and the server are just one file. When a user runs the game, he is offered a choice to either create a game or join an existing game. So when a user creates a game, the program will create the game and also join him as a player to the game. This is basically a listen server (as opposed to a dedicated server) - a familiar concept in multiplayer games. I came across a really interesting question while trying to make this - how can I ensure that the player hosting the game doesn't tamper with it (or atleast make it difficult)? The player hosting the game has access to the array used to store the board etc., and these must be stored in the process' virtual memory, so it seems like this is impossible. On the other hand, many multiplayer games use this model for LAN games.

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  • not detecting wireless networks

    - by pac
    i'm a new linux user and i cannot add or edit any network connections, nor is the system detecting any wireless networks when i try to access additional hardware from system, it doesn't even open...so i'm stuck. lspci | grep -i wireless comes out with 06:0a.0 Network controller: Intel Corporation PRO/Wireless 2200BG [Calexico2] Network connection (rev 05) lspci -n -s 06:0a.0 comes out with 8086:4220. i dont know if that info was relevant but any help on this would be appreciated.

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  • Reconstruct a file from a TCP stream

    - by Abhishek Chanda
    I have a client and a server and a third box which sees all packets from the server to the client (but not the other way around). Now when the client requests a file from the server (over HTTP), the third box sees the response. I am trying to reconstruct the file there. I am using libpcap to capture TCP datagrams and trying to reconstruct the file there. Here is what I did Listen for packets on an interface Group all packets which have the same ACK number Sort the group based on SEQ number Extract data from each packet and combine them and write to the disk The problem is, the file thus generated is not exactly the same as the original file. Does everything sound correct here? Some more details: I am using C++ The packet data is being stored as std::vector<char> I did change the byte order while reading the ack number and seq number from the packet using ntohl I am not sure if I need to change the byte order for the data as well. I tried to reverse the data from each packet before combining them, even that did not work. Is there something I am missing?

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  • How can I force the (re)discovery of PulseAudio network sound devices?

    - by Christian
    I'm using the PulseAudio feature of network sound devices (not Multicast/RTP) to play sound from my netbook on the audio equipment connected to the HTPC when at home. This creates a virtual sound device that I can then use instead of the physical built-in one. Most of the time this works just fine. Sometimes however, the virtual sound device just doesn't appear. Disconnecting from and reconnecting to the network helps sometimes but not always and it's annoying and potentially bad for existing TCP connections. So my question basically is: Is there some way to tell PulseAudio "Hey, just look again if you really can't find a network sound device."? Edit: Unloading and reloading the module-zeroconf-discover with pacmd does not help either and it doesn't appear to be an avahi problem per se since avahi-browse -t --all | grep PulseAudio shows lots of right-looking stuff, even when the devices aren't listed in pavucontrol or pacmd list-sinks. Edit 2: I'm using Ubuntu 12.04 on both boxes for all the difference it might make.

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  • Changes to 'resolveconf' discarded when connecting to a new network

    - by sudheer
    I have upgraded to 12.10 from 12.04 recently and I am having issues with connecting to the Internet. I got an IP address and am able to ping other LAN IPs in the local network but I am unable to connect to the Internet and am even unable to ping www.google.com from a terminal. Somehow making changes in /etc/resolv.conf and restarting resolvconf service and rebooting works but I need to do this every time I connect to a new network. How do I make these changes permanent? Can someone suggest a solution to this issue?

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  • I don't know how to connect to the internet

    - by Michiel
    I'm having some trouble finding an answer to my problem. I have a dell desktop (studio hybrid) and i have windows vista on it. The internet on windows vista works great, no problem. But now i downloaded Ubuntu 11.10 and I'm having problems. I can't find how to connect to my wireless network, when i click the network icon, it shows a list of things but I can only click 'enable wireless network' or something like that and 'edit connections'. But in this list it also says ( in a grey collor and i can't click it ) : 'No wireless connection, device not ready (firmware missing)" Or something like that. Now i tried several things i read on the internet (using my vista OS cause i can't use ubuntu for the internet, which is really enoying). But none of them helped me. I would like someone to tell me what my problem is or what information I have to give you to get an answer. So tell me if i have to edit a connection, or tell me how i have to get the wireless connection to work and to repair the 'firmware missing problem'. I hope someone can/is willing to help me. Bye

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  • No wireless network recognized on a Dell Vostro 3560

    - by Itai
    I just installed Ubuntu 12.04 along with Windows 7 on the same laptop - Dell Vostro 3560. Now, on Windows 7 I can access to different wi-fi networks. However, when I am logging onto the Ubuntu section (after re-starting my laptop) - an error message appears: Disconnected - you are now offline When I take a look at my network menu (in the upper bar on the screen), I see that no network is found (and I have a few of them in the area. ). I tried to look around but really could not find a concrete practical solution to this specific problem, would appreciate any solution from anyone out there that had this problem and solved it.

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  • Unable to connect to wireless network

    - by Mike
    A real newbie here. Just downloaded Ubuntu 12.10, put on USB stick and have booted it on my other PC after modifying the boot sequence to boot from USB before hard drive where Windows XP lives. Have no problems with Windows and my wireless but not with Ubuntu. The PC is a Dell Latitude D630 laptop. According to Windows XP , the wireless card is a Dell Wireless 1490 Dual Band WLAN Mini-Card, my IP address is 192.168.0.193, subnet mask is 255.255.255.0, assigned by DHCP, SSID is HOME , type 802.11 and default gateway is 192.168.0.1. Ok, back to booting from USB and TRY option, I am Editing Network connections, I have created/configured "Wireless connection 1" with SSID of HOME and the only other thing I have changed is on the "Editing IPV4 routes for Wireless connection 1 I have enterred 192.168.0.193 , netmask 255.255.255.0 and gateway 192.168.0.1 Anyways , no go. Could use some help. Thanks, Mike from Montreal

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  • VPN disconnected: resolv.conf not refreshed

    - by cwall
    I connect to VPN using vpnc. When VPN disconnects, either via time out or the session limit is reached, VPN is terminated, but resolve.conf continues to contain references to my VPN network. resolv.conf before VPN is connected: nameserver 127.0.0.1 search mylocalnetwork resolv.conf after VPN is connected and remains once VPN is lost: nameserver X.X.X.X nameserver X.X.X.Z nameserver 127.0.0.1 search internal.mycompany.com mylocalnetwork In 10.04, when VPN lost, I'd run this script to refresh resolve.conf: 7$ cat bin/refreshResolvconf.sh #!/bin/bash #if [ -e /etc/resolvconf/run/interface/tun0 -a "`pidof vpnc`" == "" ]; then /sbin/resolvconf -d tun0; fi if [ -e /etc/resolvconf/run/interface/tun0 -a "`pidof vpnc`" == "" ] then /sbin/resolvconf -d tun0; echo "Refreshed resolv.conf" fi But, resolveconf changed in 12.04 changed, so this script is no longer applicable. To resolve, I manually edit resolve.conf or turn off/on my connection via "gnome-control-center network". Anyone else have the same problem? How can resolv.conf be updated post-VPN disconnect?

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  • Reverse WiFi to Broadcast connection coming from a USB device

    - by Daniel Clem
    I am using the app called Clockworkmod Tether. It connects using a script ( command line " gksu ./run.sh " ) on the computer. All my programs connect to the internet perfectly, minitube, midori, transmission torrents. But the network manager does not show any connection, wired or wireless. So this may cause issues? What I want to do is take this connection, and be able to share it some way, any way, by wireless. This Acer Timeline "Aspire 5810TZ" does have an Ethernet, so wired out to a router might be an option. But I would prefer to simply reverse the Wireless card to broadcast out to about 2 or 3 devices. Is this possible? Yes I have taken a look at the other questions already posted here, but the answers are 1 year old or older, and not clear at all. I am moderately comfortable (4.5 out of 10 ) on the command line. But pretty much need line by line directions for what commands are needed and what order, ect. Edit I have already tried the method of "Left click network manager, Create New Wireless Network" It is created fine, and I am able to connect to it with a tablet, but am un-able to get an outside connection with it. Using the "Shared to other computers" option because DHCP doesn't seem to work, and WEP Passphrase Security. I get an IP address on the connected device. But as I said, won't bring up any outside webpages or the like. So perhaps this is the wrong approach?

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  • slow speed transfering files to a local network device

    - by F. Ariel Jung
    I'm having troubles copying files from my pc(ubuntu 13.04 64 bits) to a Media Center(WDTV Live: with an SATA2 HDD attached) through the local network. the speed is to slow, it's up to 2.0 MB/s image: http://s11.postimg.org/g1nuai92b/Captura_de_pantalla_de_2013_06_24_07_46_55.png (I don't use image tag because it is a big image) my PC has a wifi network card Tp Link TL-WN951N and it is connected to a TP Link TL-WDR3500 router via wifi, and the WDTV Live is connected via LAN here is a iwconfig: eth0 no wireless extensions. lo no wireless extensions. wlan0 IEEE 802.11bgn ESSID:"TL-WDR3500" Mode:Managed Frequency:2.462 GHz Access Point: A0:F3:C1:6C:3B:F1 Bit Rate=39 Mb/s Tx-Power=20 dBm Retry long limit:7 RTS thr:off Fragment thr:off Power Management:off Link Quality=62/70 Signal level=-48 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:33521 Invalid misc:2245290 Missed beacon:0 if more data is required I'll post it as needed. I can't figure this out, needed help. please

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  • How do I get a Qualcomm Atheros Killer E2200 gigabit ethernet card working on a MSI Z87-GD65?

    - by Travis Allen
    So I literally just built my first computer from scratch and I can't get the network card to work as I've gathered it requires getting some drivers somehow.. Motherboard : MSI Z87-GD65 CPU : Intel Haswell i7 Ubuntu Ver : 12.04 Using the on-board network port Please help I'm about to start crying into my keyboard over this (not really). Any info would be greatly appreciated, also please be very specific as to what I have to do as I have not used Ubuntu very much so talk to me like a child, I won't take offence. Also I've already tried following the instructions here : How do I get a Qualcomm Atheros Killer E2200 gigabit ethernet card working? I don't know if I'm just retarded or am missing something

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  • How to promote/market an event that needs many people?

    - by stjowa
    My team is about to launch a new web application, http://wethepixels.com, that requires a lot of people to be on the site at the same time for the concept to be successful. Our team is preparing to promote/market an event for a specific date and time, in order to try to grab a large group of people to the site at once. For those who have gone through a similar web launch, we would love to hear ideas on the best way to market for a large group in a relatively short period of time. We have created a Facebook page and a Facebook event, but it has yet to grab much attention (surprisingly to us). Is there a better way to attract a large number of users in a short period of time? Thanks

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  • Problems with wired ethernet connection Ubuntu 11.10

    - by Andrew Fielden
    After some partition shuffling, I've got a problem on my 11.10 system. The wired ethernet interface fails to come up, although the wireless interface is working. I'm using NetworkManager. I thought this may be a problem with NetworkManager, so I checked the config files, which look ok. I then tried re-installing the package, but this didn't resolve the issues. I'm not sure at this point if the problem is due to software configuration, or a hardware problem. I've also tried the cable in other router ports, but same problem. The symptoms are:- System settings - Network reports that the cable is unplugged (it isn't) ifconfig reports the following eth0 Link encap:Ethernet HWaddr f0:4d:a2:a2:a7:fe UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:10 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:792 (792.0 B) TX bytes:0 (0.0 B) Interrupt:46 Base address:0xe000 My /etc/network/interfaces file has the following: auto lo iface lo inet loopback My /etc/resolv.conf file has the following: # Generated by NetworkManager The router's red light is on for this port dmesg reports ADDRCONF(NETDEV_UP): eth0: link is not ready

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  • Why is wireless slow with Atheros AR9285?

    - by Luke
    I know there are many posts like this, however none of the fixes I have found have worked. I had the issue on 11.04, and after having no luck fixing it decided to try 12.04 however this has not fixed the problem. I'm using a Lenovo IdeaPad, the network card is a Atheros Communications AR9285. edit add outputs: sudo iwconfig lo no wireless extensions. wlan0 IEEE 802.11bgn ESSID:"NETGEAR-PLOW" Mode:Managed Frequency:2.437 GHz Access Point: E0:91:F5:7D:1B:BA Bit Rate=65 Mb/s Tx-Power=15 dBm Retry long limit:7 RTS thr:off Fragment thr:off Encryption key:off Power Management:on Link Quality=66/70 Signal level=-44 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:77 Invalid misc:63 Missed beacon:0 eth0 no wireless extensions. lspci -nnk | grep -iA2 net 06:00.0 Network controller [0280]: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) [168c:002b] (rev 01) Subsystem: Lenovo Device [17aa:30a1] Kernel driver in use: ath9k -- 07:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller [10ec:8136] (rev 02) Subsystem: Lenovo Device [17aa:392e] Kernel driver in use: r8169 Thanks

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  • How to connect to a serverside process on Ubuntu running in a VM?

    - by Jenko
    I am running Ubuntu 11.10 in VirtualBox, on Windows 7. I'm trying to setup a serverside process like Apache on it. How do I configure VirtualBox to allow access to the Ubuntu server process from other computers on the network? I can access the internet from Ubuntu. The Windows 7 computer is on a WiFi network using DHCP. The WiFi network has a dynamic IP with the network provider. This is my current configuration:

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  • Moving AI in a multiplayer game

    - by Smallbro
    I've been programming a multiplayer game and its coming together very nicely. It uses both TCP and UDP (UDP for movement and TCP for just about everything else). What I was wondering was how I would go about sending multiple moving AI without much lag. At first I used TCP for everything and it was very slow when people moved. I'm currently using a butchered version of this http://corvstudios.com/tutorials/udpMultiplayer.php for my movement system and I'm wondering what the best method of sending AI movements is. By movements I mean the AI chooses left/right/up/down and the player can see this happening. Thanks.

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  • Can't connect to or see my wifi ssid

    - by ant
    Today I installed ubuntu 12.04 on my laptop. I am unable to see my home SSID or even connect to it. I've tried to connect as a hidden SSID but I always get prompted for authorization although my key is correct. I'm in in Europe but my laptop is from US. I'm not sure if that is relevant. I've read around this site and saw something that has to do with setting the channel above 11. I'm not sure I did that correctly I did this : How to use Wi-Fi channels above 11? Did't help. I'm able to connect with cable but not via wifi either windows or linux. Other devices in my home can connect without any issues, even the kindle. Here is the screenshot from my router : Here is some additional info : lspci | grep -i network 08:00.0 Network controller: Qualcomm Atheros AR9285 Wireless Network Adapter (PCI-Express) (rev 01) lspci -nnk | grep -A2 0280 08:00.0 Network controller [0280]: Qualcomm Atheros AR9285 Wireless Network Adapter (PCI-Express) [168c:002b] (rev 01) Subsystem: Hewlett-Packard Company U98Z062.10 802.11bgn Wireless Half-size Mini PCIe Card [103c:303f] Kernel driver in use: ath9k m-tool NetworkManager Tool State: connected (global) Device: wlan0 ---------------------------------------------------------------- Type: 802.11 WiFi Driver: ath9k State: disconnected Default: no HW Address: 90:4C:E5:38:79:0D Capabilities: Wireless Properties WEP Encryption: yes WPA Encryption: yes WPA2 Encryption: yes I'm not sure what to do next. Any suggestions?

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  • RPC protocols comparison

    - by Ricardo
    I have to select a protocol/technology to use for communicating a client-server architecture, with support both for Python and C. The main requirements are: Symmetrical communication in between ends: clients establish a connection and servers can send data back to clients through the same connection. Avoid excessive overhead by using HTTP or a big stack (if possible, TCP direct communication). TLS/SSL support for secure communications. Ease of implementation. For that, I evaluated the following protocols/communications technologies. Is the information on this table accurate and correct? (*1) TLS support for RPyC is based in a no-longer supported Python library.

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  • Multiplayer Network Game - Interpolation and Frame Rate

    - by J.C.
    Consider the following scenario: Let's say, for sake of example and simplicity, that you have an authoritative game server that sends state to its clients every 45ms. The clients are interpolating state with an interpolation delay of 100 ms. Finally, the clients are rendering a new frame every 15ms. When state is updated on the client, the client time is set from the incoming state update. Each time a frame renders, we take the render time (client time - interpolation delay) and identify a previous and target state to interpolate from. To calculate the interpolation amount/factor, we take the difference of the render time and previous state time and divide by the difference of the target state and previous state times: var factor = ((renderTime - previousStateTime) / (targetStateTime - previousStateTime)) Problem: In the example above, we are effectively displaying the same interpolated state for 3 frames before we collected the next server update and a new client (render) time is set. The rendering is mostly smooth, but there is a dash of jaggedness to it. Question: Given the example above, I'd like to think that the interpolation amount/factor should increase with each frame render to smooth out the movement. Should this be considered and, if so, what is the best way to achieve this given the information from above?

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