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• How do I stop video tearing? (Nvidia prop driver, non-compositing window manager)

  - by Chan-Ho Suh

  I have that problem which seemingly afflicts many using the proprietary Nvidia driver: Video tearing: fine horizontal lines (usually near the top of my display) when there is a lot of panning or action in the video. (Note: switching back to the default nouveau driver is not an option, as its seemingly nonexistent power-management drains my battery several times faster) I've tried Totem, Parole, and VLC, and tearing occurs with all of them. The best result has been to use X11 output in VLC, but there is still tearing with relatively moderate action. Hardware: MacBook Air 3,2 -- which has an Nvidia GeForce 320M. There are two common fixes for tearing with Nvidia prop drivers: Turn off compositing, since Nvidia proprietary drivers don't usually play nice with compositing window managers on Linux (Compiz is an exception I'm aware of). But I use an extremely lightweight window manager (Awesome window manager) which is not even capable of compositing (or any cool effects). I also have this problem in Xfce, where I have compositing disabled. Enabling sync to VBlank. To enable this, I set the option in nvidia-settings and then autostart it as nvidia-settings -l with my other autostart programs. This seems to work, because when I run glxgears, I get: $ glxgears Running synchronized to the vertical refresh. The framerate should be approximately the same as the monitor refresh rate. 303 frames in 5.0 seconds = 60.500 FPS 300 frames in 5.0 seconds = 59.992 FPS And when I check the refresh rate using nvidia-settings: $ nvidia-settings -q RefreshRate Attribute 'RefreshRate' (wampum:0.0; display device: DFP-2): 60.00 Hz. All this suggests sync to VBlank is enabled. As I understand it, this is precisely designed to stop tearing, and a lot of people's problem is even getting something like glxgears to output the correct info. I don't understand why it's not working for me. xorg.conf: http://paste.ubuntu.com/992056/ Example of observed tearing::

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• Why do we move the world instead of the camera

  - by sharethis

  I heard that in an OpenGL game what we do to let the player move is not to move the camera but to move the whole world around. For example here is an extract of this tutorial: http://open.gl/transformations In real life you're used to moving the camera to alter the view of a certain scene, in OpenGL it's the other way around. The camera in OpenGL cannot move and is defined to be located at (0,0,0) facing the negative Z direction. That means that instead of moving and rotating the camera, the world is moved and rotated around the camera to construct the appropriate view. Why do we do that?

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• How do I create tileable solid noise for map generation?

  - by nickbadal

  Hey guys, I'm trying to figure out how to generate tileable fractals in code (for game maps, but that's irrelevant) I've been trying to modify the Solid Noise plug-in shipped with GIMP (with my extremely limited understanding of how the code works) but I cant get mine to work correctly. My modified code so far (Java) GIMP's solid noise module that I'm basing my code off of (C) Here is what I'm trying to achieve but This is what I'm getting So if anybody can see what I've done wrong, or has a suggestion how I could go about doing it differently, I'd greatly appreciate it. Thanks in advance. And if I'm asking way to much or if just a huge failure at life, I apologize.

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• career change : non-functional to test automation

  - by centennial

  I started my Career as core-Java developer 6 years ago and stayed as developer for 6-7 month and then moved to performance testing (actualy pushed into this for short term and later I started liking it). I have done all sort of non-functional testing like performance, load, stress, soak, compatibility, failover etc on many performance test tools accross many industries. I was doing contracting all these years which means I kept moving to new projects after every 3-6 months. Now personal situation has been changed, married man now so looking for something long term. Performance testing generally comes at the end of the development life cycle hence very short term contracts so I was wondering if I can move into functional/test automation side I can earn myself good length of contract. I had some exposure of QTP but I am sure to learn all other tools very quickly as I am quite good in programming and concept of testing. in short I want to move into functional test automation to get long term contract without leaving my love for programming . any thoughts please ?

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• How do I avoid the complexity concerns of frameworks while keeping my team marketable?

  - by Desolate Planet

  When deciding upon how to design a software project with my colleagues, most suggestions tend to be for using specific frameworks "because it's popular in the job market" or "that's the framework that gets recruiters on the phone," and never what I'm looking for which is, "because it's a good fit for the project as it makes the system more adaptive to future changes and makes life easier for developers." I didn't start looking at projects in this way until I started reading up on domain-driven design. I've found that the actual domain is hidden deep under the frameworks used and it's hard to learn the business processes that have been implemented by the software product. Is there a way to marry the two competing goals: getting exposure as a development team while still being able to avoid complexity? Are frameworks that compromise, or are there other solutions out there?

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• Updates to Silverlight Code Browser

  A couple of bits of news. I did a number of updates to the HackingSilverlightCodeBrowser here:http://www.hackingsilverlight.net/HackingSilverlightCodeBrowser.html including things like MEF and IsolatedStorage. As to the community edition of the book, I'm still trying to get some contributors to finish. I've been slammed with 60 hour weeks so chapter 2 and 4 and appendix a still need edits. maybe a weeks worth of work pending time which tends to be limited in my life. :)...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Foreign key restrictions -> yes or no?

  - by This is it

  I would like to hear some”real life experience” suggestions if foreign key restrictions are good or bad thing to enforce in DB. I would kindly ask students/beginners to refrain from jumping and answering quickly and without thinking. At the beginning of my career I thought that stupidest thing you can do is disregard the referential integrity. Today, after "few" projects I'm thinking different. Quite different. What do you think: Should we enforce foreign key restrictions or not? *Please explain your answer.

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• Ubuntu for Phones / Touch vs Android, IOS and BlackBerry OS

  - by Ome Noes

  Currently I have a LG Google Nexus 4 with lots of issues because of the latest android 4.3 update. Since the update my battery drains within 7 hours when in it's standby / idle and even faster when I use it normaly! Before the Nexus 4 I had an Iphone but got sick of IOS because for me it's to much of a closed operating system and I dislike having to work with either Windows or Itunes. At this point neither Google or LG is willing to provide me (and all the others that have similar Nexus 4 problems) with a solution or even a reaction... Also i'm not very fond of the idea that the NSA (and maybe others) can and is currently monitoring millions of Android, IOS and BlackBerry OS devices all over the world. Since i've been using Ubuntu now very happily for almost 5 years I see Ubuntu for Phones / Touch as the only remedy for all this BS. Please be so kind to let me know when you will have a fully functioning version of your Ubuntu for Phones / Touch ready for consumer use. I'm realy sad that the Ubuntu Edge campaign didn't work out and hope to see lots and lots of future smartphones outfitted with Ubuntu a.s.a.p.! Keep up the good work!

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• How To Remotely Copy Files Over SSH Without Entering Your Password

  - by YatriTrivedi

  SSH is a life-saver when you need to remotely manage a computer, but did you know you can also upload and download files, too? Using SSH keys, you can skip having to enter passwords and use this for scripts! This process works on Linux and Mac OS, provided that they’re properly configured for SSH access. If you’re using Windows, you can use Cygwin to get Linux-like functionality, and with a little tweaking, SSH will run as well.What is a Histogram, and How Can I Use it to Improve My Photos?How To Easily Access Your Home Network From Anywhere With DDNSHow To Recover After Your Email Password Is Compromised

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• Reasons to disable game save during combat (e.g. Mass Effect 2)

  - by Steve V.

  So I've been playing Mass Effect 2 (PC) and one of the things I've noticed is that you can only save your game when you're not engaged in combat. As soon as the first enemy shows up on your radar, the save button is disabled. Once combat is over, save functionality reappears. It seems reasonable to assume that Mass Effect 2 is a state machine, and therefore, the internal state of the program at any moment can be captured and reloaded later. This is basically a solved problem - games have been designed this way since the Half-Life era. It also seems reasonable to assume that BioWare knew what they were doing when they made the decision not to follow this model - it's a tried and true system; BioWare wouldn't have done it the way they did without some good reason. What reasons are there to disable game save functionality during combat?

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• Is this a pattern? Proxy/delegation of interface to existing concrete implementation

  - by Ian Newson

  I occasionally write code like this when I want to replace small parts of an existing implementation: public interface IFoo { void Bar(); } public class Foo : IFoo { public void Bar() { } } public class ProxyFoo : IFoo { private IFoo _Implementation; public ProxyFoo(IFoo implementation) { this._Implementation = implementation; } #region IFoo Members public void Bar() { this._Implementation.Bar(); } #endregion } This is a much smaller example than the real life cases in which I've used this pattern, but if implementing an existing interface or abstract class would require lots of code, most of which is already written, but I need to change a small part of the behaviour, then I will use this pattern. Is this a pattern or an anti pattern? If so, does it have a name and are there any well known pros and cons to this approach? Is there a better way to achieve the same result? Rewriting the interfaces and/or the concrete implementation is not normally an option as it will be provided by a third party library.

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• Question about whether I should pursue minors or work towards a masters [closed]

  - by user75493

  I'm a sophomore about to go into my Spring semester in a few weeks and I am trying to decide some major things that will affect the next few years of my life and was looking for some guidance/advice. I'm currently working towards a Bachelors in Computer Science and my question was whether I should minor in Corporate Strategy and Math or just work towards a Masters in Computer Science? I was wondering if employers are more looking for Masters degrees in Computer Science or if those minors could be beneficial to me. Some things that may affect responses: I already have all my other requirements filled for graduating except my Computer Science classes, I've already had an internship this past summer and am already hearing back from several companies about internships for this upcoming summer. Thanks in advance! - Alex

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• Creating a Application in Winrt that requires Internet

  - by wtsang02

  I am making a paid App for Windows 8, c#. I am wondering which is better? If my application doesn't need internet connection normally but does requires internet connection for the first time to download content data. --Makes my life easier Load the default data when installing. Then ask the user if he wants to update in app. -- Making the default data will be pain. Now my big question is, is it safe to assume user has access to internet now-a-days when using application that shouldn't require internet?

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• Encryption Password help!

  - by Carlos L.

  Ok so let me summarize this up. I encrypted my Home to protect against hackers of course when I first installed Ubuntu. It loaded up the Terminal and was attempting to show me my encryption password incase it ever needed to be used. So I thought "Ehh what the heck, I can find it out later..." So I closed Terminal and went on with the (amazing!) Ubuntu life. But now I am having to install Java JDK 7.0.0.4 onto my computer to ya know, play games and such. But it is asking for my password for the encrypted Home folder but it never gave it to me... HELP!!! Does anyone remember the command for Terminal to give you you're randomly generated Encryption password pop up on the famous purple window? Please give legitimate answer and fast please!

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• B2B Customer Case Study Presentation at OOW 2012!

  - by user701307

  Real life B2B customer talking about consolidation to Oracle B2B and SOA Suite. Hear Kevin Kluggage, IT Director, Stryker and me present on consolidating legacy B2B networks on a global B2B infrastructure using Oracle B2B and SOA Suite. This session will discuss B2B industry trends, product overview, Stryker's case study and will elaborate on the benefits of using Oracle B2B to solve your partner integration needs today. Oracle B2B is Drummond Certified and has customers using the product in Supply Chain, Travel, Transport, Healthcare, Hightech and Telecom industries. We are excited about our session, and look forward to see you there! Wed, Oct 3, 3:30 PM – 4:30 PM – Moscone West – 3003CON5003 – Delivering a High-Value Global B2B Network with Oracle SOA Suite 11g

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• Help with google pages; using them in general

  - by Sugarcube

  Is there any way someone could help me with building a website using google pages? I cannot for the life of me figure out how to do much more than create a new page, and I have been up all night. I thought I knew computers and websites but apparently I need a refresher course. Please, if you can help, I would be most appreciative. -Sugarcube Edit: Seems this is too vague. But honestly, I don't even know where to begin with the way Google has it set up. I tried to set one up with a template and a layout, but the layout has pages that I did not create and that I don't know how to edit to make them suitable to my website. I guess if I had to start somewhere it would be on how to make it do what I want it to do.

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• SharePoint Saved My Puppy

  - by Mark Rackley

  The SharePoint journeys video contest ends today, and I thought I’d submit my video about how SharePoint has changed my life. The video has not been approved yet for some reason, so I thought I’d post it quickly here… When it does get approved, please be sure to rate it.  Thank you SharePoint for giving me back my puppy… Maybe we can start a write-in campaign or something???  And be nice.. it’s all in good fun.

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• Learning to program on punchcards

  - by Plutor

  I'd like to try programming with punch cards once in my life. How can I do this? I'm in my 30s, and grew up entirely in the PC era, programming on computers with screens and keyboards. I want to experience the way my father and grandfather used to work. I imagine the hardware (and probably the cards themselves) are no longer manufactured. Are there any universities or museums with functioning punch card readers anymore? I'm in Boston, but I'm willing to travel to do this. I asked MetaFilter, and I got some mixed answers (along with a lot of "no, don't do this" nay-saying). I did get a pointer to the Retro-Computing Society Of Rhode Island, but I haven't received a response to my email to them yet.

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• Are the Broadcom drivers in any new releases for my Dell with BCM4401 and BCM4311

  - by ematthe1

  I installed 12.04 on my wife's Dell laptop to replace 10.04. The code for the Broadcom drivers is broken and I am a user, not a coder. Does any available release of Ubuntu have the drivers in place so I can install and run and get my life back after days of thrashing around. I am willing to do some work, but I am not up to heavy duty command line activity. Please help if you can with any information. Thanks in advance. Matt

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• How do I implement powerups for my Breakout clone?

  - by Eva

  I'm making a simple Breakout clone in Python that will have very many powerups/powerdowns (so far I came up with 26). Some will affect the paddle (paddle missile, two paddles, short paddle, etc.), some will affect the ball (slow ball, destructo-ball, invisible ball, etc.), some will affect the bricks (brick scramble, move up, bricks indestructible, etc.), and some will affect other game aspects (extra life, more points, less points, etc.). I'm pretty sure I have the code to draw the falling powerups and test for collisions with the paddle down, but I'm confused about how to code the effects of the powerups. Since there are very many powerups, it seemed inefficient to add specific methods to each component as done in this tutorial. However, I can't think of an other ways to implement the powerups. I found a page that hints at some way to design powerup behavior using classes, but I'm at a loss for how to do that. (A short example would help.) Please give me a short code example of another way to implement the effects of the powerups.

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• Unity LifeTimeManager for WCF

  I really love DI-frameworks. One reason is that it allows me to centralize life-time management of objects and services needed by others. Most frameworks have options to control the lifetime and allows objects to be created as Singletons, ThreadStatics, Transients (a new object everytime) etc. Im currently doing some work on a project where Unity [...]...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Do you need expensive servers and fancy hosting in order to make a multiplayer game?

  - by ThePlan

  I've finished working on an RPG and it would seem so much more fun to make it multiplayer. SFML has a networking feature, I figured it's possible but then again, never in my life have I even tried something basic about networking, in fact my knowledge of it is very limited. What would it take to make a multiplayer game resource-wise? I'm not talking about an MMO, more like a co-op type of game. Do I need mountains of cash to pay for hosting and servers and many many things to make one?

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• Hiring developers - listing IDE as a requirement?

  - by suslik

  I've been looking at some job postings and noticed that a fair amount of them list IDEs under the 'required skills' section, even for senior positions. This is not localized to one company either, but rather it's something that comes up once in every few postings. I am perplexed by this job requirement, as my mentors and some of the best coders I've seen in my life were VIM/Emacs ninjas. Similarly, when I work with people I don't much care what tools they use as long as they are productive on the team. Can someone please explain the rationale behind hiring managers making IDEs an official job requirement?

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• A Dozen USB Chargers Analyzed; Or: Beware the Knockoffs

  - by Jason Fitzpatrick

  When it comes to buying a USB charger one is just as good as another so you might as well buy the cheapest one, right? This interesting and detailed analysis of name brand, off-brand, and counterfeit chargers will have you rethinking that stance. Ken Shirriff gathered up a dozen USB chargers including official Apple chargers, counterfeit Apple chargers, as well as offerings from Monoprice, Belkin, Motorola, and other companies. After putting them all through a battery of tests he gave them overall rankings based on nine different categories including power stability, power quality, and efficiency. The take away from his research? Quality varied widely between brands but when sticking with big companies like Apple or HP the chargers were all safe. The counterfeit chargers (like the $2 Apple iPad charger knock-off he tested) proved to be outright dangerous–several actually melted or caught fire in the course of the project. Hit up the link below for his detailed analysis including power output readings for the dozen chargers. A Dozen USB Chargers in the Lab [via O'Reilly Radar] 6 Start Menu Replacements for Windows 8 What Is the Purpose of the “Do Not Cover This Hole” Hole on Hard Drives? How To Log Into The Desktop, Add a Start Menu, and Disable Hot Corners in Windows 8

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• Error on /home prevents OS boot

  - by mdrg

  Ok, I'll try to explain it listing the events: motherboard battery is weak, loses config everytime I shut the PC down; system clock usually back to 1990-something; this time, it went up to 2148; ubuntu became somewhat unusable (firefox refusing certificates, dropbox blocked), so I restarted; manually set the clock to current date and restarted; during boot, ubuntu detects errors and start auto-fix, rebooting itself in the middle of it (like a hard reboot, no shutdown messages) next time, shows boot animation screen in text mode, with an error message after a while: "Errors were found while checking the disk drive or /home", with "attempt to fix, ignore, skip mounting or manual recovery" None of the options during the boot work, they just type the text to the screen, then I'm forced to physically restart. Now I'm using Mint LXDE live CD, and I can see all my partitions just fine, including /home (my home folder blocked due to encryption, the other user folder is accessible and everything in place). I'm not sure how to proceed now. I'd like to just fix ubuntu boot without reinstalling or anything like it (at least until 12.04). What should I do now? can I easily fix this somewhow? Thanks!

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