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• Ubuntu 12.04 boot freezes

  - by Lajos Soukup

  I installed win7 on one of my machines. It works without any problem. Now I can not install Ubuntu 12.04 (11.10, 11.04) because the installation process stops in a very early stage: I can see that ISOLinux was loaded, then I can see some very simple icons, then I can see text messages of the kernel. The last message I can see: [6.177983] sr 5:0:0:0: attached scsi general ss1 type 5 At that point the system stops. I tried different versions (11.04) , I disabled, and then disconnected the hdd, but the same problem occured independently from my actions. I can boot a gparted live cd, but that system can not see my hdd. On the other hand, I can boot the installation cd of the latest stable Debian distribution without any problem, but I would prefer to use Ubuntu, because I use that distribution on all of our machines.s Configuration: Asus P8H61-MLE motheboard, Gigabyte GTS 450, Intel i5, 4gb ram, wd 1T sata hdd Any idea? Best regards, Lajos

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• In this context with views in a tree, which class should perform the task?

  - by Jhonny 8

  Imagine that I have this context: A main view containing a table containing some cells. Each one of them with their own controller and view files. In the main view, I have an object "Person", with 3 different IDs. Depending on certain conditions (let say, time of the day), I have to choose one of them and display it in the cell. My question is, should the main view pass the whole object to the table, and this one to the cell, and the cell will calculate the ID that it will be shown? or, The main view calculates this parameter, and send the result to the table and this to the cell? Is a question focused on OO design, which one of this approaches is more suitable in an OO design and why?

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• How to move an object using X and Y coordinates in JavaScript

  - by Geroy290

  I am making a 2d game with JavaScript and HTML5 and am trying to move an image that I have drawn with JavaScript like so: //canvas var c = document.getElementById("gameCanvas"); var ctx = c.getContext("2d"); //baseball var baseball = new Image(); baseball.onload = function() { ctx.drawImage(baseball, 400, 425); }; baseball.src = "baseball2.png"; I'm not sure how I would move it though, I have seen many people seem to just type something like ballX and ballY but I don't understand where the actual x and y definition comes from. Here is my code so far: http://jsfiddle.net/xRfua/ I have a different image source but it is a local source so I couldn't include it. Thanks in a dvance for any help!

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• hp XW8000 work station power supply

  - by user281745

  My power supply went up in the XW8000 and I bought a new corsair cx500. I installed it but when I hook it up and I turn the computer on I get a beeping noise from the computer. I looked at the old power supply and the new power supply. The only difference is that the new power supply has 500 watts and the old one is 450 watts and the old PSU has a brown wire and the new power supply has 2 orange wires at the end. I found out that it is a sense wire that is in a different location so I was wondering how do I fix this problem.

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• IOS 6.0.1 - 5W happiness for ALL.

  - by Barry Shulam

  In my first iPad Gen1 and iPad Gen2 I received a 10W charger.  When you plugged in your devices to a lower rated source It would display a msg box telling you the device could not charge from that source.It seem now the latest update for the iPad minis permits the larger brother iPad2 to charge from the 5w charger.I will take longer!  However you are no longer stranded by a limited division of which charger can charge the apple devices -  as they all can, just at different rate now.Try it yourself and let me know if you charge the 3 and 4 with the 5w iphone ipod adapters.Peace,Kosher Koder.

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• How do I stop Ubuntu Precise freezing/hanging

  - by artfulrobot

  At least once a day I lose work on my (2 different) Intel i5 machines running Ubuntu 12.04. The entire system will freeze/lock-up/hang, and never return. At this point nothing works; even the caps lock key doesn't toggle the light on the keyboard; Ctrl-Alt-F1 won't do anything either. askubuntu.com is apparently where I'm directed for support. I suspect this is a kernel bug. But I simply can't keep losing work like this, so I'm anxious to try whatever it takes to get the thing reliably working. Can you suggest something I can try to fix the problem an existing bug I can follow progress on and contribute to (from users/tester's POV) the most constructive way I can contribute to helping fix the problem, keeping in mind that I do need the computer (so can't do things that might "brick" it!)

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• Application development : method to manage backgound process

  - by Simon Dubois

  I am developing an application with different behavior depending on the arguments : - "-config" starts a Gtk window to change options, start and close the daemon. - "-daemon" starts a background process that does something every X minutes. I already know how to use fork/system/exec etc... But I would like to know the main logic of such application to : - restart or refresh the daemon when configuration change. - keep only one instance of the daemon. I have red that killing the daemon to restart it is not a clean way to do. How other applications do ? (ubuntuone, weather forecast, rss feed working with notification area) Thanks for your help. PS : I don't want to create a system-wide daemon, just a user application with a background process.

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• Framework Folders and Duplicate File Names

  - by Kevin Smith

  I have been working with Framework folders a little bit in the past few days and found one unexpected behavior that is different from Contribution Folders (Folders_g). If you try and check a file into a Framework Folder that already exists in the folder it will allow it and rename the file for you. In Folders_g this would have generated an error and prevented you from checking in the file. A quick check of the Framework Folder configuration settings in the Application Administrator’s Guide for Content Server does not show a configuration parameter to control this. I'm still thinking about this and not sure if I like this new behavior or not. I guess from a user perspective this more closely aligns Framework Folders to how Windows handle duplicate file names, but if you are migrating from Folders_g and expect a duplicate file name to be rejected, this might cause you some problems.

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• Cannot access BIOS on a Lenovo U410

  - by Michael

  I recently took a step into Linux on my Lenovo Idea pad U410; after a couple hours I managed to get it installed with the drivers. However now I no longer have the ability to access the BIOS. I tried the usual FN+F2, F2,F1,Del,Tab,F12,F11; all to no avail. I was wondering is there something different to be done running Ubuntu? I know that the BIOS would generally not be affected by the OS. Does anyone have any suggestions?

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• How can a domain use its own nameservers?

  - by Thomas Clayson

  I have to change the MX DNS records for our company domain name and I've come across this odd situation: A whois search shows up that the nameservers for ourcompany.com are ns1.ourcompany.com and ns2.ourcompany.com. In the DNS settings at the registrar there are no A/Cname records at all. However the nameservers are defined in the DNS settings for the domain on our dedicated server. (Registrar and host are two different companies). Using the DNS lookup on http://www.mxtoolbox.com/ shows that ns2.ourcompany.com is reporting the correct IP for our dedicated server. Its all very odd... the DNS on the dedicated server doesn't seem to have much effect, but its odd that the dns at the registrar's end doesn't have any records. thanks for your help.

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• How to modify VBO data

  - by Romeo

  I am learning LWJGL so i can start working on my game. In order to learn LWJGL I got the idea to implement the map builder so I can get comfortable with graphics programming. Now, for the map creation tool I need to draw new elements or draw the old one's with different coordinates. Let me explain this: My game will be a 2D scroller. The map will be consisting of multiple rectangles ( 2 strip triangles). When I click my left-mouse button i want to start the rectangle and when I release it I want to stop the rectangle bottom-right at that position. As I want to use VBOs I want to know how to modify data inside the VBO based on user input. Should i have a copy of a vertex array and then add the whole array to the VBO at each user input? How is usually implemented the VBO update?

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• "The system is running in low graphics mode", unable to connect to the Internet

  - by Blah

  When I try to log onto Ubuntu, I get a notice that reads: The system is running in low graphics mode. I searched for a solution and there are a slew of answers. However, many of them seem to suggest reinstalling different things. After pressing Ctrl+Alt+F1 and getting to a terminal, I attempt commands like sudo apt-get install example. Upon doing so I get notices that say things such as could not resolve host which I am assuming means I'm not connected to the Internet. Since I can not connect to the Internet, none of these responses are helpful to me. What can I do?

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• Why the overhead when allocating objects/arrays in Java?

  - by Gnijuohz

  How many bytes an array occupies in Java? Assume It's a 64bit machine and also assume there are N elements in an array, so all these elements would take up 2*N, 4*N or 8*N bytes for different types of array. And a lecture in Coursera says that it would occupy 2*N+24, 4*N+24 or 8*N+24 bytes for a N element array and the 24 bytes is called overhead, but didn't explain why the overhead is needed. Also objects have overheads, which is 16 bytes. What exactly are these overheads? What are these 24/16 bytes composed of? Also, do these overheads only exist in Java? How about C, C++ and Python?

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• Is it bad practice to use the same name for arguments and members?

  - by stijn

  Sometimes I write constructor code like class X { public: X( const int numberOfThingsToDo ) : numberOfThingsToDo( numberOfThingsToDo ) { } private: int numberOfThingsToDo; }; or in C# class X { public X( int numberOfThingsToDo ) { this.numberOfThingsToDo = numberOfThingsToDo; } private int numberOfThingsToDo; } I think the main reason is that when I come up with a suitable member name, I see no reason to use a different one for the argument initializing it, and since I'm also no fan of using underscores the easiest is just to pick the same name. After all it's suitable. Is this considered bad practice however? Any drawbacks (apart from shooting yourself in the foot when forgetting the this in C#)?

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• XNA: SpriteFont question

  - by Zukki

  Hi everyone, I need some help with the SpriteFont. I want a different font for my game, other than Kootenay. So, I edit the SpriteFont xml, i.e: <FontName>Kootenay</FontName> or <FontName>Arial</FontName> No problem with Windows fonts, or other XNA redistributable fonts pack. However, I want to use other fonts, that I downloaded and installed already, they are TTF or OTF, both supported by XNA. My problem is, I cant use them, I got this error: The font family "all the fonts i tried" could not be found. Please ensure the requested font is installed, and is a TrueType or OpenType font. So, checking at the windows fonts folder, I check the properties and details of the fonts, I try all the names they have, and but never works. Maybe I need some kind of importing or installing in order to use them, I dont know, and I hope you guys can help me, thanks!

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• What should a game have in order to keep humans playing it?

  - by Adam Davis

  In many entertainment professions there suggestions, loose rules, or general frameworks one follows that appeal to humans in one way or another. For instance, many movies and books follow the monomyth. In video games I find many types of games that attract people in different ways. Some are addicted to facebook gem matching games. Others can't get enough of FPS games. Once in awhile, though, you find a game that seems to transcend stereotypes and appeals almost immediately to everyone that plays it. For instance, Plants Versus Zombies seems to have a very, very large demographic of players. There are other games similar in reach. I'm curious what books, blogs, etc there are that explore these game types and styles, and tries to suss out one or more popular frameworks/styles that satisfy people, while keeping them coming back for more.

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• Why 'nobody' always starts a new `find` program that always consume my memory?

  - by UniMouS

  $ ps -elf | grep ... 0 D nobody 27320 27319 2 90 10 - 353471 sleep_ 07:54 ? 00:02:19 /usr/bin/find / -ignore_readdir_race ( -fstype NFS -o -fstype nfs -o -fstype nfs4 -o -fstype afs -o -fstype binfmt_misc -o -fstype proc -o -fstype smbfs -o -fstype autofs -o -fstype iso9660 -o -fstype ncpfs -o -fstype coda -o -fstype devpts -o -fstype ftpfs -o -fstype devfs -o -fstype mfs -o -fstype shfs -o -fstype sysfs -o -fstype cifs -o -fstype lustre_lite -o -fstype tmpfs -o -fstype usbfs -o -fstype udf -o -fstype ocfs2 -o -type d -regex \(^/tmp$\)\|\(^/usr/tmp$\)\|\(^/var/tmp$\)\|\(^/afs$\)\|\(^/amd$\)\|\(^/alex$\)\|\(^/var/spool$\)\|\(^/sfs$\)\|\(^/media$\)\|\(^/var/lib/schroot/mount$\) ) -prune -o -print0 ... This job always start automatically and consumes my memory. Even after I kill it, it will starts several hours later. What's that job? EDIT Note: the pid is different from the above because I killed the above one, wait for several hours, then the second one comes. $ pstree -psl |-anacron(25920)---sh(25929)---run-parts(25930)---locate(26343)---updatedb.findut(26348)-+-frcode(26358) | |-sort(26357) | `-updatedb.findut(26356)---su(26387)---sh(26402)---find(26403) This is what it look like in a graphical tool:

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• add packages to squid-deb-proxy cache

  - by zpletan

  To save bandwidth and data on my Internet plan, I have installed squid-deb-proxy on a desktop, and the client on it and a few other machines I've got. However, based on the post that put me onto this , it sounds like if I take my laptop to a different network and update it there, the downloaded updates will NOT be automatically copied back to the squid-deb-proxy server when I get back on my network. Assuming that this is correct (I will be testing later), is there a way I can stick these packages into the cache so I don't have to download them one more time for other machines in the network?

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• NightHacking Tour Across Europe

  - by Tori Wieldt

  Java Evangelist Stephen Chin (@steveonjava) is motorcycling across Europe, and dropping in on developers and Java User Groups to talk about Java and do some hacking. What's cool is you'll be able to be a part of it too: watch via live streaming, and interact using #nighthacking on Twitter. The tour will kickoff stateside with a visit to James Gosling (Father of the Java Language) - Wednesday Oct 24 at 11AM  PST.  Some noteworthy stops on the tour include: Ben Evans (LJC Leader and Author) - Saturday Oct 27 at 8PM BST (12PM PST) Adam Bien (Java Champion and Author) - Friday Nov 2 at 11AM CEST (2AM PST) Andres Almiray (Griffon Founder and Author) - Sunday Nov 4 at 8PM CEST (11AM PST) In total, there will be over 20 different interviews, several JUG visits, and special coverage of J-Fall and Devoxx conference.You can view the full schedule and watch streaming video at nighthacking.com.

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• Handling & processing credit card payments

  - by Bob Jansen

  I'm working on program that charges customers on a pay as you go per month modal. This means that instead of the customers paying their invoices at the start of the month, they will have to pay at the end of the month. In order to secure the payments I want my customers credit card information stored so that they can be charged automatically at the end of the month. I do not have the resources, time, or risk to handle and store my customers credit card information on my servers and am looking for a third party solution. I'm a tad overwhelmed by all the different options and services that are out there and was wondering if anyone with experience have any recommendations and tips. I'm having difficulty finding services that allow me to to store my customers credit card information and charge them automatically. Most of them seem to offer an invoice styled approach.

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• Where do my programs get installed?

  - by Micah

  Coming from windows I'm used to having everything installed in c:\program files\company\product. On Ubuntu I'm totally stumped. It seems like everything I install winds up somewhere different. Somethings are in /bin some in /home/myuser and others in /etc or /usr. I can't seem to figure this out. In particular I'm trying to find where they're located so I can either setup shortcuts on the task bar or associate them with other programs (like my greasemonkey editor) but I'm not having any luck.

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• Unity and games don't work on new Thinkpad T420

  - by Clay Smalley

  Here's my setup: Lenovo ThinkPad T420, brand new NVIDIA Graphics Card 4GB of Ram 128GB Solid State Drive Intel Core i5 Processor Given these specs, there's no reason games and Unity shouldn't be working. The strange thing is that both do work when I run from a live USB, but not when Ubuntu is installed to the hard drive. Is there something different with the 3D capabilities of running from the computer as opposed to running from the live USB? Edit: Some more information: When I log in for the first time when running from the hard drive, Ubuntu says "It seems that you do not have the hardware required to run Unity. Please choose Ubuntu Classic at the login screen and you will be using the traditional environment."

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• Technique to Display Multiple Browser Windows Tiled at Same time?

  - by Kendor

  I have a separate monitor that I use for Toodledo (a web-based task managment app), in which I like to display various views (Next Action Status, Waiting Status, Planning Status, and Overdue Due-Date items). I've been playing around with some add-ons on Firefox that allow you to split the browser, but they are cumbersome. I'm now trying Chrome, and opening 4 different browser windows that I've tiled on the screen in quadrants (I use the Compiz grid applet for this). This is not ideal as each browser replicates the URL bar and the tab, and I don't have opening ths windows automated upon restart. Chrome is great in managing screen real estate, but this is not ideal. In Firefox I tried various extension to hide interface elements, but it was very clunky... Am wondering whether anyyone has tried to do similar with TD, and how they achieved what I'm going after? Am wondering whether someone has a good technique for accomplishing what I'm looking for?

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• Changing DisplayMode seems not to update Input&Graphic Dimension

  - by coding.mof

  I'm writing a small game using Slick and Nifty-GUI. At the program startup I set the DisplayMode using the following lines: AppGameContainer app = new ... app.setDisplayMode( 800, 600, false ); app.start(); I wrote a Nifty-ScreenController for my settings dialog in which the user can select the desired DisplayMode. When I try to set the new DisplayMode within this controller class the game window gets resized correctly but the Graphics and Input objects aren't updated accordingly. Therefore my rendering code just uses a part of the new window. I tried to set different DisplayModes in the main method to test if it's generally possible to invoke this method multiple times. It seems that changing the DisplayMode only works before I call app.start(). Furthermore I tried to update the Graphics & Input object manually but the init and setDimensions methods are package private. :( Does someone know what I'm doing wrong and how to change the DisplayMode correctly?

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• How to disable the Mount notification in Gnome 3.4?

  - by Thompson

  How to disable those annoying notifications when you plug a new disk in, or connect to a network and so on.... I know that if I add a device to a mount script they will be mounted on boot thus not showing me the notification, which I did for my hard drives, but it doesn't help with all those flash disks I have... I can't add them all that would be silly. I looked at: How can I disable gnome-shell's notification area? ... but they didn't help, since the code was different I also looked at configuration editor, but I think it can only disable auto-mount when inserted, it doesn't disable notification...

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