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• How to send a popup message to unknow computer connected to my WLAN?

  - by Leandro

  Is there any way to send a popup message from a Linux systen to a "random" laptop/tablet/mobile linked to my Wireless network ? For example, if I let my WLAN open and I see a not recognized computer connected to it, is there anyway to send to that device a message ? On the other hand, if I am connected to someone else open network and they may or may not be aware that their network is open, can I send them a message warning that I am accessing their network? Probably for a completely "random" device the answer should be no. But if we restrict to laptops with Win7 or Linux SO is there any service running by default on such systems that allows one to send such popup messages ? PS: I have no practical motivation for this question. This is only a curiosity.

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• Re-enabling audio on an iMac

  - by Warren Seine

  Hello guys, I know Super User is not a 'tech support' forum, so I will try to make it short: my computer's sound does not work anymore. I have asked for support on the Apple board but I feel a bit on my own. To summarize, the Sound Panel of my iMac does not display any outgoing channel (headphones or internal speakers). It does not work on Windows either. Contrary to what it may seem, I have the feeling that it is not a hardware issue (and that GarageBand is somehow interfering). If you have an idea to solve the problem, please share. Making it work again is a lost cause without sending it back to Apple, so the question I'm asking is: What is the best workaround (cheap Firewire sound card?) for getting my sound back? Thanks.

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• Flash player, HD videos and games are choppy

  - by Aimad Majdou

  I have a problem with flash player. HD videos from Youtube or Vimeo and flash games do not play smoothly. I'm using Flash player 11, Windows 7 Sp1, and my graphic card is Intel GMA 4500. Device Manager shows me that all drivers are installed on my computer, so i don't have any problems with drivers. When I run Google chrome, Resource Monitor shows me 15% ~ 40 % of CPU Usage and 40% used Physical Memory, but when I watch a video on Youtube or play a Flash game, the Resource Monitor shows 70% - 90% CPU Usage. Also, when I run some HD Video (Frame width : 1920, Frame height : 1080) on my computer, Device Manager shows me 80% ~ 100% of CPU Usage. before I Reinstall Windows 7, HD Videos and flash games were play smoothly I hadn't any problem with them !! I hope all these informations are enough to answer my question.

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• Spoof user agent for GoGo Inflight Internet?

  - by AndyL

  Is it possible to trick the GoGo Inflight WiFi on airlines into thinking that you have a mobile device instead of a laptop? It seems like most airlines that offer in flight wireless these days use GoGo. They offer different pricing for mobile and laptops. It seems like they are checking the browser's user agent. Out of curiosity, is it possible to use a Firefox extension like this one to spoof the user-agent and allow a laptop to access the internet under a GoGo mobile plan? How would GoGo handle something like an IMAP email client, like Thunderbird. Do IMAP clients have a user-agent field as well that would normally identify whether the mail client is running on a laptop or mobile device?

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• Freezing with black screen after booting OS with AMD Catalyst driver

  - by Oleg

  I have ATI Mobility Radeon HD 5470 on my HP laptop. A few weeks ago I was confused with a weird trouble in proprietary drivers for my graphics card. When I start X server (or just boot Windows) system sometimes totally hangs up with black screen. The most annoying thing is that issue appearing is absolutely random (2 success, 3 fails, 1 success, 7 fails, etc.). It appears both on Linux (Arch, Debian 7) and Windows XP. I've tried reinstalling OS, drivers, etc. I've also tried updating BIOS. Then boot was successful for the next few times and issue appeared again (probably it was just a coincidence, because another BIOS updates gave no results). I really don't know what to do. Any ideas?

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• In Ubuntu, MoBlock makes it take a while to actually start using internet

  - by Matchu

  When connecting to wireless internet in Ubuntu (tested with two different networks), I connect nearly instantly. However, to actually load a page, I need to wait a few minutes, at which point I can actually use a web browser or Pidgin. Until then, various applications try to connect until they time out. I've discovered that, if instead of waiting a few minutes, I open Terminal and run sudo /etc/init.d/blockcontrol stop, everything suddenly is able to load. I can then start MoBlock again with no ill effects. Why is this happening? What is it that would cause MoBlock to take a few minutes to start letting traffic in, but only when started on bootup? Thanks!

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• Wifi connected but no data transfer

  - by Anuj

  I have a Desktop which runs on Windows XP and a laptop which runs in Ubuntu. Recently I have set up a wireless router in order to be able to access internet on my laptop through wifi. The laptop connects to the wifi at ease, but is unable to transfer any data. Only when I switch on my laptop for the first time, it is able to transfer some data only for around 2 mins, after which it shows Destination Host unreachable on pinging the router, and everything stops working, but the wifi still shows to be connected. Please help!

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• How to stop Windows 7 from automatically connecting to unsecure wifi network

  - by Remi Despres-Smyth

  One of my neighbors has an unsecure wifi network called WLAN. At one point in the past, I accidentally connected to it, and disconnected immediately when I noticed. Now, when I open my laptop at home, it sometimes connects to the WLAN network first, before trying my (secured) home wifi network. The information I've found regarding this issue seems to suggest this network should have a profile on the "Manage wireless networks" screen - but it does not. How do I tell Windows 7 to never connect to networks with SSIDs called WLAN? Or to never connect to unsecured networks without confirming with me first?

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• wi-fi connection drops periodically for a few seconds

  - by sergiom

  I've read the similar question on wireless connections dropping, but no answer seems to apply to my case I have configured the wi-fi lan of my router to broadcast sid and use WPA-PSK. Every few minutes my wi-fi connection drops for a few seconds and then restores. When I use two computers and run a ping -n 50000 on both computers, I see that the connection drops at different times but with almost the same rate. the router is a zyxel, one pc runs windws vista and uses a USB wi-fi device from Belkin: F6D4050 the other one runs windows 7 is a Dell PC with an Intel(R) WiFi Link 5100 AGN there are no other wi-fi lans around

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• WIFI: iPhone/iPad getting much slower bandwidth than laptop

  - by Sam

  I just got cable internet installed (Comcast). It claims that my down speed should be 25mbit. Over wifi, I get close to that on my laptop, but only about 8 on average with my iPhone/iPad. I'm using testmy.net in the browser on all devices. I have an ARRIS / Motorola SurfBoard SB6141 DOCSIS 3.0 Cable Modem and a Medialink Wireless N Broadband Router. I read somewhere that disabling WMM and the firewall on the router would help (is this even a safe idea?). I've tried both, and neither seem to make much of a difference, if any at all (sidebar: I've noticed that my download speeds vary wildly with cable internet... on my laptop, I'll get 12 down, then 22 five minutes later. Is this typical for cable internet?).

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• Rendering composite/SVideo input with GraphEdit (comp./svid. source for crossbar)?

  - by Synetech

  Does anyone know how to form a GraphEdit graph to render composite/SVideo input (especially for a Hauppauge or AIW card)? Google (and Google Images) finds only results focusing on rendering the TV tuner which is already simple enough. The tv-tuner-in pins connect to the TvTuner/TvAudio source, but nothing seems to be able to connect to the Composite/SVideo pins. I have looked through the filters and could find no sources to connect to the Composite/SVideo input pins of the crossbar; GraphEdit always complains that they are not compatible.

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• nVidia Control Panel Won't Recognize SLI

  - by Nakaan

  So yesterday I bought a brand new, 1,000W PSU to replace my 650W one and to allow for SLI. I install it and my second card (both are GTX 560 ti cards). I reinstalled my drivers and my system recognizes both cards. The control panel says "GTX 560 ti x2", I can select between them for Physx, sound output, picture output (although I only have one hooked up to my monitor), etc. But the kicker is I can't turn on SLI. Everything I've read says I'll get a balloon notification saying I can use SLI and the control panel will have a new section, etc, but none of those things happens. Anyone have any ideas? System: Win7 Professional x64 2x GTX 560 ti 3.1 GHz Intel Core i5 1,000W Xion PSU 8GB RAM (Can't think of my motherboard right now) Note: My PSU and MOBO both say they're SLI certified and I'm using an SLI bridge. Edit: Formatting changes

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• Netgear router-speed problem after XBox use

  - by John Dudley

  When my son is at my place at the weekend, he plays XBox Live over the internet, using my wireless network (Netgear 'g' type router). This usually thrashes & crashes the router to the extent I have to hard-boot it to get it working again. However, after this weekend, on my two laptops, I'm left with the problem that the router is working, but I'm only getting 0.38Mbps out of it, at all times of the day. I've tried hard-booting the router, but no difference. Could this be a knock-on effect of the Xbox use? I can't believe the router could be damaged, but working slower? Is that possible? Tiscali haven't come back to me yet on any 'network' issues. Thanks in advance

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• Spoof user agent for GoGo Inflight Internet?

  - by AndyL

  Is it possible to trick the GoGo Inflight WiFi on airlines into thinking that you have a mobile device instead of a laptop? It seems like most airlines that offer in flight wireless these days use GoGo. They offer different pricing for mobile and laptops. It seems like they are checking the browser's user agent. Out of curiosity, is it possible to use a Firefox extension like this one to spoof the user-agent and allow a laptop to access the internet under a GoGo mobile plan? How would GoGo handle something like an IMAP email client, like Thunderbird. Do IMAP clients have a user-agent field as well that would normally identify whether the mail client is running on a laptop or mobile device?

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• Vista laptop won't connect to airport extreme

  - by Hutch

  Our previous router died, and to replace it I procured an apple airport extreme. My mac, my wrt54gs (with ddwrt acting as a bridge) and a linux machine have had no problem connecting to the wireless. None of the wired clients are having a problem obviously. The problem is one of my roommates can not connect. That's not strictly true. He can connect to the network, and will, infact, get a dhcp lease. However he cannot get any packets out. Can't ping the router, can't access any web sites, nothing. However he's fine if we switch to an unsecured network. Which is obviously not acceptable. The airport only allows for 'wpa/wpa2 personal' and 'wpa2 personal' (and of course the enterprise versions there of) I keep reading about this problem in multiple spots on the web, but never see any actual answers... Anyway the laptop: hp/compaq cq50-215nr vista home premium wireess card: atheros 5007 airport is simultaneos dualband II

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• Ad-hoc connection between iPhone and Macbook Pro

  - by Phil Nash

  I sometimes find it useful to connect my iPhone to my Macbook Pro by creating an ad-hoc wireless network from the MBP and connecting to that from the iPhone. However, what I find is that sometimes this works and sometimes it doesn't. When it's not working the symptoms are usually that I see the ad-hoc SSID in the list of available networks on the iPhone, can connect to it from there (including entering my WEP key), and it shows up as the wifi network in use. However I don't get the wifi symbol in the taskbar (it remains as 3G) and attempting to use the connection (e.g. trying to connect to iTunes or Keynote using their respective Remote apps) fails saying that there is so wifi connection. I've tried rebooting both the iPhone and the MBP, recreating networks with different SSIDs and tried different channels - all to no avail! I'm especially puzzled that (a) sometimes it works just fine first time and (b) the Settings app seems to think its all connected fine. Is there anything else I should be trying?

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• Unable to connect to network

  - by user33750

  Hey guys, I have a question. I have been having problems connecting a new netbook to my network at home. I have an Asus Eeepc 100HAB. I have tried to run a repair on the connection, uninstalled and re-installed the network card, made sure all of the drivers are up-to-date as well. Two caveats: I have a laptop that I recently switched to a wired connection because it wasn't connecting to the network as well, and the netbook connects to an unsecured network i found just fine, only having a problem getting into my home network. Passwords are correct, and the computer where the connection originates from is working fine as well. Any ideas?

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• Coffeeshop limits Internet connection to 30 minutes -- how does it recognize me if I delete my cooki

  - by Andrew

  I was connected to the Internet in a coffeeshop earlier today, but I was only allowed 30 minutes of access. I tried deleting my cookies after my time was up (though admittedly I didn't delete my Flash cookies -- would that have solved the problem?), but the connection still recognized that I'd already used 30 minutes, so I couldn't connect again. How did the connection recognize me still? The wireless was unprotected (no code or password), it just had a portal you had to pass through upon the initial connection. I'm not terribly familiar with web development or computer networks, so just trying to get a better idea of what's happening (and possibly to know what to do next time I use up my minutes =)).

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• How to find ip address of my Asus RT-AC86U in Access Point mode?

  - by WilliamKF

  I'm using an Asus wireless router model RT-AC68U and can connect fine to the internet using it wirelessly. I configured the router to be an Access Point, but having done so, I can no longer locate the GUI to adjust the router as I have no idea what its IP Address is anymore. The router is plugged into a cable modem and router which is a model SMCD3G is a business class gateway labeled Comcast Business IP Gateway. This gateway is assigning ip addresses in the range 10.1.10.XX and I went to the web interface at 10.1.10.1 and listed the connected devices and see my laptop which is connected to the Asus access point along with a few other devices, but none of the devices listed are the Asus router (I tried all the six ip addresses listed). How can I determine the IP Address of my Asus router in access point mode so I can see the GUI interface again to control the router other than by doing a factory reset?

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• Windows 7 Laptops "unable to find logon server"

  - by tombull89

  In the school I work in we have a large number (500+) of Windows 7 laptops on a Meru Wireless system and Server 2008 R2 Servers. We have an appalingly large failure rate where a student or staff member tries to logon (to the laptop joined to the domain) and is met by "There are currently no logon servers available to service the logon request". I've seen this question and this one and while removing and re-joining to the domain works, it's highly time consuming, irritating, and we (I) have more important things to concentrate on. The only MS KB article I can find is regarding a read-only domain controller (which ours isn't) and I'm at my wits end. Ultimately, is there a definitve cause and answer to this or am I stuck removing and re-joining the laptops?

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• WLAN LED randomly blinking when there is no traffic

  - by mrc

  Hi, I've got a Linksys WUSB54GC WLAN USB interface (Ralink chipset) and I'm running Debian GNU/Linux 6.0. The LED very often randomly blinks although there is no traffic in the network. I checked this with Wireshark. Sometimes, but rarely, the LED stops blinking. The issue is present in Ubuntu and Fedora too. It was not present in Debian Lenny with Linux 2.6.28. I checked an old live cd with ubuntu 8.10 with kernel 2.6.27 and it was also OK. So I guess that's an issue with Linux kernel and its wireless driver or firmware. Has anybody observed a similar thing? Does anybody know how to help this annoying blinking? Thanks.

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• WiFi: Connect to a network with hidden SSID in Windows 7

  - by Dor

  I have Windows 7 with the following station: D-Link DWA-160 Xtreme N Dual Band USB Adapter(rev.A2) (driver version 3.5.0.21). I'm trying to connect to a wireless network that has an hidden SSID with the command: Netsh wlan connect name="myNetworkProfile" The profile is configured to connect even if the network is not broadcasting its name (SSID). Despite that, the command fails promptly every time with the message: The network specified by profile "myNetworkProfile" is not available to connect. Nonetheless, when trying to connect manually using the dialog box (see image below), it successfully connects to the network after about 10 or 15 seconds. Also, Please - no need to elaborate about how useless the hidden SSID feature is.

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• Netgear WNR1000 WiFi speed

  - by Kamil Klimek

  I have Netgear WNR1000 150N, Macbook Pro 13" with Broadcom BCM43xx 1.0, Network connection 60mbps When I connect through the cable I easily get around 60mbps. When I go through the WiFi it's capable to get only 32mbps at tops. Any ideas why is that? Is that my router limitation or maybe my WiFi card? If it is routers fault what router would you suggest. Best router would be with usb port for external hard drive. Forgot to add screenshot with connection details: Szybkosc transmisji == Transmission speed

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• Wpa supplicant suddenly stopped working

  - by Grzenio

  Hi, Recently my wireless stopped working on my Debian testing system. It just doesn't connect. The best I get (only after a reboot) is that it says it did connect, but failed to get IP address. But usually it just tries to connect, disconnects straight away, connects again etc. so it never manages to associate correctly. I am sure it did work about a month ago, stopped working after recent upgrades from the repository. Any ideas how to find the issue and fix it?

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• dell vostro 1310 with nVidia 8400M display problem

  - by Arthur

  Hi everyone, i hope someone can help me with this problem. I have a Dell vostro 1310 Laptop with 32 bit vista and a 8400M nVidia chip. Recently i have noticed performance issues when my girlfriend was playing Sims 3, and then one day i turned it on and all i got was a thick white line at the bottom of the screen. i heard the OS start up so automatically i thought it was a damaged screen, but i had doubts so i plugged it into an external display via the vga port. it worked but everything appart worm the OS choice menu looks distorted beyond belief. even the bios screen had multicoloured lines running down the screen. The resolution is non existant, the screen only shows a 256 colour pallette and is heavily distorted. i barely managed to get to the device manager where i found the gfx card with an exclamation mark. does anybody have suggestions? should i buy a new mobo or are repairs possible? thanks in advance

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