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  • Simple Math Multiplayer game - is Ajax sufficient?

    - by Christian Strang
    I'm planning to create a simple math multiplayer game and I plan to just use Ajax for the server/client communication but I'm not sure if this is sufficient or if I need a socket server. The game will look like this: 2-4 users all get a simple math task (like: "37 + 14") they have to solve it as fast as possible first user who solves it is the winner I will track the time for each user, since the game started, on the client side and everytime a user gives an answer, the answer and the passed time will be send to the server. Additionally I'll add a function which will check every 3 seconds if the other users finished, how much time they needed and who won. Do you think this is possible just using Ajax? What alternatives are there?

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  • How does timeseal work? [on hold]

    - by Simon Meyer
    I know the the fics (free internet chess server: www.freechess.org/) does use a program called timeseal to measure the time that a user needed to take a move. This timeseal is some time measurement on the client. Measuring on the client is much better and fairer than measuring the time on the server since you don't lose time just by having a bad connection. But since fics has a lot of interfaces to play on - what prevents rogue interfaces to say that they always only used 0.1 seconds for any move? Does anyone know how this is handled? Just a sidenote: i don't want to build a rogue interface, but i'm trying to build something similar that is measuing client side time but should not be easy to cheat on.

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  • How to prevent Gnome desktop from crashing?

    - by nixnotwin
    I have ubuntu 10.10 32bit running on my Asus EEEPC 1005PX. I am experiencing frequent desktop crashes. When I turn on my netbook at least once in 5 times the defualt ubuntu theme disapears and the classic gnome theme appears. Many times while doing some work, the desktop crashes and the CLI gets shown, and after a few seconds the login screen appers. I am not using any widgets or dock bars, I just have a single gnome panel with default menus. The crashes also happen when using the default bundled ubuntu apps. Is there any way to avoid these crashes?

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  • My ASUS U32U with fresh Xubuntu install shows a black screen 50-80% of the startups

    - by Jona Ekenberg
    I have recently installed Ubuntu 12.10 with Xubuntu-package on my ASUS U32U notebook (Radeon HD 6320 GPU). The issue I have is that more often than not, after the GRUB-select screen I get a black screen, and three times total white lines (kind of) flashes very quickly (with maybe 5 seconds between each flash). I'm not even able to get to the login-screen (nor the Xubuntu loading screen). At first I thought it was simply me having installed something dumb or messed up some settings, but even after reformatting the partition and installing ubuntu again, the problem remains. Before I formatted it xfce4's window manager wouldn't start either, but it does now (when I am able to see anything). I can access the virual consoles (ctrl+alt+f1), but I can't see anything, but I've managed to shutdown the computer by using it (sudo shutdown -h now).

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  • Redirect AFTER Initiating download

    - by mashup
    I have a question - is there any way to initiate a download and AFTER the user has confirmed the download then redirect to another site? Is something like that possible via ASP or another language commonly used for websites? Bad PHP "user experience" scenario (In use right now) a) User comes to site, clicks download button b) Users sees "download" landing page, gets redirected after 5 seconds c) Download starts on Thankyoupage Good "user experience" scenario: (my dream solution, what I want) a) User comes to site, clicks download button b) Download starts immediately on landing page c) Download confirmed, redirects now to thank you page Any programming language is a go for this.

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  • How do I design a game framework for fast reaction to user input?

    - by Miro
    I've played some games at cca 30 fps and some of them had low reaction time - cca 0.1sec. I hadn't knew why. Now when I'm designing my framework for crossplatform game, I know why. Probably they've been preparing new frame during rendering the previous. RENDER 1 | RENDER 2 | RENDER 3 | RENDER 4 PREPARE 2 | PREPARE 3 | PREPARE 4 | PREPARE 5 I see first frame when second frame is being rendered and third frame being prepared. If I react in that time to 1st frame it will result in forth frame. So it takes 3/FPS seconds to appear results. In 30 fps it would be 100ms, what is quite bad. So i'm wondering what should I design my framework to response to user interaction quickly?

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  • ubuntu 12.04 returns to login screen on resume from suspend. Is there a fix?

    - by Chad
    When I resume from a suspend, Ubuntu 12.04 will come back ok for about 10 seconds, and then the screen blanks out. After about another second or so, it returns to the login screen for Unity 2d. It normally runs Unity 3d. How can I fix this? I've lost a lot of work from this problem. I sometimes get a error report window asking me to report a Compiz crash after rebooting. I think it may be Compiz or the Xorg server causing the problem. I'm not really sure. Thanks if you can provide help.

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  • Is there now any way to convert mp3 files to m4a or aac 192kbit?

    - by piedro
    Since about two years now I am trying to find a way to convert high quality mp3 files to m4a or aac files with a fixed bitrate 192k. Please don't suggest using another format - i thought this through as far as it goes. The problem here is: ffmpeg obvioulsy can't convert to a higher bitrate than 152k. Even when it says it does so the resulting files still have 152k instead of 192k. ffmpeg also has/had a bug not writing the bitrate into the audio file tags which means when testing you have to calculate the bitrate manually by dividing the filesize by the length of the audio in seconds (resulting in 152k - see above) choosing faac as converter gets me the same results other programs don't work reliably (see this thread Howto convert audio files to *.m4a? I know that this is not an original new problem but I am wondering if there is still no way to convert with ubuntu/kubuntu 12.04 after a lot time passed and I can't find some of the bug issues mentioned in the other thread anymore. So: Is there a solution after all?

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  • How to detect whether an Object came to sleep at a specific position?

    - by Nils Riedemann
    I'm currently writing a small game with box2dweb and I need some direction for this: I'm throwing a Box and have to hit a specific place and trigger an event when the object that's been thrown isn't moving anymore, "fell asleep" so to say. What's the proper way / best practice for this? I'm currently thinking of asking the b2World whether an Object is within a specific AABB and then wait a few seconds, check if it's still there and then trigger the event. But this seems to me like the roundabout way and the object might still be moving inside of that AABB and eventually even drop out of the AABB.

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  • Windows 7 Service Pack 1 is Released: But Should You Install It?

    - by The Geek
    Microsoft has just released the final version of Service Pack 1 for Windows 7, but should you drop everything and go through the process of installing it? Where can you get it? We’ve got the answers for you. If you’ve never installed a service pack before, it’s just a big collection of fixes and changes for your operating system, bundled into a big fat download to make it more convenient if you reinstall—if you’ve kept Windows updated, it should have most of the fixes already installed through Windows Update Latest Features How-To Geek ETC How To Make Hundreds of Complex Photo Edits in Seconds With Photoshop Actions How to Enable User-Specific Wireless Networks in Windows 7 How to Use Google Chrome as Your Default PDF Reader (the Easy Way) How To Remove People and Objects From Photographs In Photoshop Ask How-To Geek: How Can I Monitor My Bandwidth Usage? Internet Explorer 9 RC Now Available: Here’s the Most Interesting New Stuff Never Call Me at Work [Humorous Star Wars Video] Add an Image Properties Listing to the Context Menu in Chrome and Iron Add an Easy to View Notification Badge to Tabs in Firefox SpellBook Parks Bookmarklets in Chrome’s Context Menu Drag2Up Brings Multi-Source Drag and Drop Uploading to Firefox Enchanted Swing in the Forest Wallpaper

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  • Why is Thunderbird pegging a core at 100%?

    - by david6
    I have experienced 2-3 unexplained lockup over last 10 days. Today, I had a random lockup (no mouse, keyboard response, 100% CPU). But, when I finally switched (Ctrl-Alt-F1) to command line (it took several minutes) it told me that thunderbird-bin had locked a CPU. I ran this to resolve: pidof thunderbird-bin sudo kill #### However, after saving other work, I tried restarting Thunderbird. It went to 90%+ CPU, and within 20 seconds it locked again. Once I have more detail I will raise a bug (on Ubuntu Forums). Does anyone have any other suggestions, advice? UPDATE Thunderbird 13.0.1 is quite stable in safe mode. Still working to resolve ..

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  • How to convert an XFS file system to HFS+

    - by user219350
    I have repeatedly convinced of the reliability of the XFS file system , and I was more than satisfied . I was happy with everything in Ubuntu 14.04 ( great software) , but there is a little "but ! " Basically, I work on OSX-Mavericks 10.9.3, which sees very Windows 8.1 and works wonders with NTFS, but does not see Ubuntu! Briefly describe the equipment: ASRock B75 Pro3-M i5 3330 GeForce GTX 650 Ti SATA 500GB running OS X Mavericks + Clover - a boot disk Toshiba 2TB running Windows 8.1 (x64) and Ubuntu 14.04 (amd64) If you boot from the Toshiba (where there is Ubuntu and boot Windows + GRUB) after restart boot from Clover, it is impossible. Tried a lot of options - as Clover installation and boot priority, and various settings for GRUB, but have not found an acceptable option and have no desire to reinstall again Clover (Mavericks reboots 20 seconds - excellent!) So please help on the file system - how to convert from XFS to HFS+ journaled. Mavericks to saw it all synced on Mac. Thank you for the sensible answer and help! Originally in Russian.

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  • Xubuntu Mail Watcher (XFCE Plugin) Won't Connect To IMAP

    - by Xophmeister
    I am trying to get the XFCE Mail Watcher panel plugin to check my IMAP mail, but it won't connect to my server. I have entered the details correctly -- they're exactly the same as those I use in Thunderbird -- but nothing! When I go to select the "New mail folders..." it returns with "Failed to get folder list". If I change my username from name@domain to name, I still get this error, but it takes a few seconds longer to appear. Nothing shows up in the log. If it makes a difference, my mail is hosted by Microsoft, in some way. Like I say, I can access it through Thurderbird using the IMAP credentials; but I have the Exchange 2010 web app, if I use webmail. Could this be the problem? (Thunderbird often complains with "Command Error. 12" with what it gets back from the server, but carries on regardless.)

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  • Creating my own kill cam

    - by DalexL
    I plan on creating my own kill cam system for a sandbox tool set. After thinking about the mechanics of the kill cam itself, however, I'm quite lost. I'm trying to recreate the ones commonly seen in call of duty games that show, from the view of the killer, the actual killing scene. My Thoughts: -I can't just keep in memory when people kill others because I wouldn't know when to start the 'recording process'. There is on way for me to accurately determine when somebody is 'about' to kill someone. -My only real idea so far is to have a complete duplicate of everything loaded off to the side copying all the movement from the original world but with a 10 second delay. That way, all the kill cams would be 10 seconds long and the persons camera would just be moved to the second world of their killer. My Questions: Is there already an accepted way to do this? Does anybody have any good ideas for something like this? Thanks if you can!

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  • Kernel Panic Fatal Machine Check

    - by 0x4a6f4672
    I have got a new Samsung Series 7 laptop with dual boot setup for Windows 8 and Ubuntu 12.10. The Ubuntu installation was quite a hassle, but with the help of Boot Repair finally it seemed to work. Or so I thought. Windows 8 starts fine, but if I want to start Ubuntu regularly the following error occurs, quite similar to this one [Hardware Error] CPU 1: Machine Check Exception: 5 Bank 6 [Hardware Error] RIP !inexact! 33 <00007fab2074598a> [Hardware Error] TSC 95b623464c ADDR fe400 MISC 3880000086 .. [similar messages for CPU 2,3 and 0] .. [Hardware Error] Machine Check: Processor context corrupt Kernel panic - not syncing: Fatal Machine Check Rebooting in 30 seconds Kernel panic does not sound good. Then it starts to reboot, and the second boot trial often works. Is it a Kernel or driver problem? The laptop has an Intel Core i7 processor. I already deactivated Hyperthreading in the BIOS, but it does not seem to help :-(

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  • Are there plans for system-wide smooth scrolling?

    - by Matt
    As Ubuntu seems to be making strategic preparations for a tablet-like experience, I wondered what priority smooth scrolling is for the team. A use case: I read PDFs on a netbook on a daily basis. Even with fullscreen, I have to scroll about every 10-15 seconds. Without smooth scroll, I have to spend a half second or so to "find" my place. Even though it seems like a small inconvenience, the increments add up quite fast. As a result, I look enviously at owners of a certain well-known tablet far too often. Related bug: https://bugs.launchpad.net/gtk/+bug/868510

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  • Google locking on Ubuntu

    - by user170534
    Problem I'm facing is that Google doesn't respond well timed to connection requests send from any browsers known to Linux. As far as I can tell, this was existent in Mint, which is Ubuntu based. I have no debug or guess about cause but I'm sure there are people with the same problem. ping of terminal is untouched but any other browser keeps unloaded, for example; google loads fine, I search for something. Then I decide to search for something else and ta daa: You gotta wait for 30 seconds for Google server to respond. I tried using google's public DNS without success. Flare the suggestions & ideas!?

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  • Page Load Time - "Waiting on..." taking ages. What part of page request process is hung?

    - by James
    I have a new cluster site running on Magento that's on a development server that is made up of 2 x web servers and 1 x database server. I have optimized the site in all areas I know (gzip, increasing php memory limits, increasing database memory limits etc) but sometimes the page loading gets stuck on 'waiting for xxx.xx.xx.xxx' (Chrome and other broswers, chrome just shows it that way). It can sit there for 40 + seconds, sometimes it just never loads and I close it in frustration. What part of the page loading process is this hung at? Is it a server issue, database issue, platform issue? I need to know where to start or whether to push the hosting provider about it.

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  • How to speed up SSH login using a public key and PuTTY?

    - by BarsMonster
    Hi! I am using PuTTY to log into my local server, but it takes about 1.5 seconds to log in (from the click on 'Connect' to working command prompt, most of time is spend on "Authenticating with public key..."). I know many see even slower speeds, but I would like to have not more than 0.1 sec. login time. I already set UseDNS=no, allowed only IPv4 in the PuTTY client, and reduced key length from 4k down to 1k. Any other suggestions to speed it up even further?

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  • Movement in RPG

    - by user1264811
    I want to make an RPG game in which I move tile by tile. So when I hit up, the tile row that I am on decreases by one for example. Also, it's supposed to be a slow movement so that I can see the change in tile, i.e. I can see my sprite move from tile to tile. Currently, with the code I have, when I hit a direction on my keyboard, I move several blocks within seconds and by the time I release the button I have already gotten a nullPointerException error because I have left the map. How can I slow down the movement?

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  • How can I make KDE faster in Ubuntu 12.04. It's very slow

    - by Rizwan Rifan
    I installed the kubuntu-desktop package in Ubuntu 12.04 LTS, but the problem is KDE responses very slowly. If I click on an application's icon to run it, it appears after 10 seconds and sometimes does not appear at all. It hangs all the time. The cursor is almost impossible to follow because of the lag. I have read on the Internet that Unity uses more memory and CPU than KDE. But on my PC Unity runs smoothly and KDE does not. So what should I do to make KDE as fast, responsive and smooth as Unity? My specifications are as follows: RAM: 1.5 GB (DDR2) Processor: 3 GHz Dual Core Graphics Card: Intel HD graphics with 256 MB memory.

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  • Ubuntu 12.10 with kernel 3.5.0-18 failing to boot

    - by Chaitanya
    I had 12.04 with kernel 3.0.2. Today I have updated my system and got 12.10 with kernel 3.5.0-18. Now when I boot my machine with 3.5 kernel, it starts until the page where I enter my password. Within seconds, I get a page with looooong list of some commands or list. I can't take screen-shot of that. It looks something like: [1.2234978942837]kjsahfa;lsfksld;fkjsf;owieurwirejw/rnw;erkjwelrjw2309480432 [1.3294823498230948]as;lfjsf;iuwrijrwjlkerjw;rekwer;lkwjre;lkjRIJWEORIWE'JJA; Luckily, in my boot page, I have 3.0.2 kernel also. When I boot with 3.0.2 kernel there is no problem. But when I boot with 3.5.0, it throws that weird error. I wont be able to do anything at that time. None of the keys work. I have to forcibly shutdown the machine and restart with 3.0.2 kernel. Please help.

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  • What measures can be taken to increase Google indexing speed for a given newly created page?

    - by knorv
    Consider a website with a large number of pages. New pages are published regularly. When publishing a new page the website operator wants to get the newly created paged indexed in Google as soon as possible. The website operator wants to minimize the time spent between publication and indexing. Consider the site http://www.example.com/ with hundreds of thousands of pages. The page page http://www.example.com/something/important-page.html is created at say 12:00. How do I get important-page.html indexed as soon as possible after 12:00? Ideally within seconds or minutes. Or more generally: What options are available to try to get Google to index a specific newly created page as soon as possible?

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  • How to make Bluetooth headset appear as a sound device?

    - by torbengb
    I have an onboard VIA sound card but no speakers attached. Instead, I want to use my bluetooth headset as my only sound device, both input and output (mono). I plugged in the bt dongle and was impressed that it was ready to use within seconds. I then paired it to my Jabra BT500 headset. No problems so far. I then went to Sound Preferences but no bluetooth is listed, only the onboard VIA sound card. Question: How can I enable my headset, and make it the default all the time?

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  • Pulseaudio not detecting bluetooth headset automatically

    - by adityap174
    The Pavucontrol on my Xubuntu 13.10 detects my bluetooth headset, but only after I type the command sudo alsa force-reload After a few seconds the headset appears in the configuration tab. I have also tried inserting the line load-module module-switch-on-connect in the /etc/pulse/default.pa but it doesn't help. I have tried purging and autoremoving and reinstalling everything right from alsa to pulseaudio and pulseaudio-module-bluetooth. Nothing works. Is there a workaround to load the headset without using the command force-reload ? To make the pulseaudio daemon recognize the device automatically ?

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