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• Triple Boot Question

  - by Rick

  I have successfully set up a a win7,win8 and Ubuntu 12.10 system. Windows 8 and Ubuntu are located on the same SSD, while windows 7 is located on another SSD. All went great and I can continue playing around with all 3 OS's. My only annoyance is, while restarting, windows 7 boot loader runs first. If I select ubuntu in the win7 manager it then runs grub2 and asks me to select an os. I used easy bcd to add entries into win8's boot manager and was hoping to just use that one. I installed ubuntu's loader on to its own partition. Any suggestions to just use Win8 loader and still be able to choose between all 3?

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• Gaming with ATI open-source drivers

  - by user7174

  I have recently bought humble bundle 2 ( http://www.humblebundle.com/ ). Is there a way to run Braid using ATI's open-source drivers? The game always crashes. When do get it to start in windowed mode once i go to the first level it will crash. I am using the lastest version of Braid (ST3C ignored) When I use the proprietary drivers Braid works flawlessly and World of Goo performance is increased. However there is terrible screen tearing with the ATI propritary drivers. So my question is: How do I play Braid if I want to use the proprietary drivers?

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• Putting Ubuntu Server on to a networked HDD

  - by SimplySimon

  Firstly, I know very little about servers and secondly the 1Tb HDD I have has network capabilities, but no software is installed on it, so when connected to the computer it is seen as a network connection, but not as a drive. Any advice on how to get started would be great. Up until now, I have been using it as a USB drive which worked well, but when this is sorted, I would like it to be connected directly to our BT HomeHub accessible through the WiFi for all the family to use as a film and back up repository. I would then be able to set up individual accounts for each family member to use and may be, if possible, make it accessible from outside locations. The First question then is: How can I install Ubuntu server on the 1Tb HDD attached directly to the computers network port but which doesn't show up in Nautilus? HDD Western Digital 1.0Tb LBA 1953525168 Model: WD10EACS-00DB0 DCM: DHRNHT2CF

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• Is client side JavaScript capable of replicating the Node.JS module loading system?

  - by jt0dd

  I like the Node.JS style of JavaScript, where I can write all of my functionalities into smaller files and then require those neatly from within my code. I'm even thinking about trying to write a framework to mimic that behavior in client-side JS. My goal would be to implement the module loading system as accurately as possible - See Module docs. For require(), I can use things detailed in answers to this question, most notably JQuery's $.getScript(). It seems to me that other aspects of the module loading system should be possible as well. So I'm asking more experienced programmers here first, before I waist my time: Is there something that I'm missing that's going to cause such an attempt to fail miserably, or can this be successfully done?

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• Type Conversion in JPA 2.1

  - by delabassee

  The Java Persistence 2.1 specification (JSR 338) adds support for various new features such as schema generation, stored procedure invocation, use of entity graphs in queries and find operations, unsynchronized persistence contexts, injection into entity listener classes, etc. JPA 2.1 also add support for Type Conversion methods, sometime called Type Converter. This new facility let developers specify methods to convert between the entity attribute representation and the database representation for attributes of basic types. For additional details on Type Conversion, you can check the JSR 338 Specification and its corresponding JPA 2.1 Javadocs. In addition, you can also check those 2 articles. The first article ('How to implement a Type Converter') gives a short overview on Type Conversion while the second article ('How to use a JPA Type Converter to encrypt your data') implements a simple use-case (encrypting data) to illustrate Type Conversion. Mission critical applications would probably rely on transparent database encryption facilities provided by the database but that's not the point here, this use-case is easy enough to illustrate JPA 2.1 Type Conversion.

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• Windows 7 won't boot? Tried Boot Repair (dual-boot)

  - by user206870

  I downloaded Ubuntu and installed it so that my computer was dual boot. The first day, Ubuntu and Windows both worked great. Unfortunately, the next day, after messing around on Compiz Config Settings Manager to get the rotation cube, I tried booting into windows 7, and it wouldn't boot. It just goes to the screen where the Windows logo comes up and says Windows 7, and then reboots without even displaying an error message. I tried boot repair and it didn't work, the problem's still there. How can I fix this? PS: here's the link that boot repair gave to me: http://paste.ubuntu.com/6287090

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• Ubuntu fail to start on a dual boot with Windows 7 on Vaio

  - by user94628

  I followed the instructions for the Ubuntu windows installer on my Sony Vaio laptop (model SVT131A11M). Upon restart I was prompt to choose the OS for boot (Win7 or Ubuntu), but then I shut down the machine and from the next boot, every time I choose to boot into Ubuntu, the GNU GRUB terminal appears with a grub> prompt. Now I'm able to boot into Win7, but can't boot into Ubuntu properly. Why does it happen and how come I was able to start Ubuntu successfully the first time?

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• Upload Recordings Of The Problem To Your SR

  - by Irina

  Do you find yourself trying several times to explain a problem in a Service Request? Does the support engineer ask more than once for clarification? If so, you might be interested in DITO -- Demo It To Oracle. DITO uses CamStudio (free download!) to record the exact nature of the problem, and upload the output to your SR. The following articles provide more details: Working with Support - MOSSOS (Doc ID 1265130.1) "Demo It To Oracle" (DITO) - CamStudio Help ( Doc ID 11.1) Why take up valuable time first explaining the problem, then trying to get a web conference setup to show exactly what is going on? The next time you file an SR, try including a recording showing exactly which application is failing, where it is failing, and what it looks like when it fails.

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• Silverlight 4 + RIA Services - Ready for Business: Exposing WCF (SOAP\WSDL) Services

  Continuing in our series, I wanted to touch on how a RIA Services can be exposed as a Soap\WSDL service.   This is very useful if you want to enable the exact same business logic\data access logic is available to clients other than Silverlight.    For example to a WinForms application or WPF or even a console application.  SOAP is a particularly good model for interop with the Java\JEE world as well.    First you need to add a reference to Microsoft.ServiceModel.DomainSerivves.Hosting.EndPoints...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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• How do I install Ubuntu to a USB key?

  - by badp

  If you are hurrying to reply, System ? Administration ? StartUp Disk Creator -- no, that's not what I'm talking about. I want to try Ubuntu 11.04's Unity without touching my existing Ubuntu install. To do this, I need to install the nVidia drivers first (sigh). To do this, I need changes to persist a reboot. To do this, I need to really install Ubuntu on a USB key. How do you do that? What I tried I tried to make a USB key from Testdrive, then boot from it, then choose "Install Ubuntu." The installer refused to install to the installation media itself. I tried, from my installed copy of Ubuntu: sudo kvm /dev/sdb --cdrom .cache/testdrive/iso/ubuntu_natty-desktop-i386.iso ...but the installer didn't detect the disk properly.

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• DBA Best Practices: A Blog Series

  - by Argenis

    Introduction After the success of the “Demystifying DBA Best Practices” Pre-Conference that my good friend Robert Davis, a.k.a. SQLSoldier [Blog|Twitter] and I delivered at multiple events, including the PASS Summit 2012, I have decided to blog about some of the topics discussed at the Pre-Con. My thanks go to Robert for agreeing to share this content with the larger SQL Server community. This will be a rather lengthy blog series - and as in the Pre-Con, I expect a lot of interaction and feedback. Make sure you throw in your two cents in the comments section of every blog post. First topic that I’ll be discussing in this blog series: The thing of utmost importance for any Database Administrator: the data. Let’s discuss the importance of backups and a solid restore strategy. Care to share your thoughts on this subject in the comments section below?

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• How to conduct A/B split testing with AdSense?

  - by None

  Ok so I have decided to A/B test my AdSense ads. I have run a few tests, but I don't know what conclusion to draw and how to keep track of things. Some specific questions: If I have 2 test units, 1 wins. I test that with a new and so on. How do I find if say the fifth one did better than the first one? How do I keep track of things? Do I let the variables independent of each other, because they certainly are not. In real life, font size can affect CTR even if the colors are different. I can test blue color with red color, and then test Arial font with Georgia, but how do I know which combination is the best? This would result in way too many test units. I tried Googling a lot, but I could not find answers to these questions.

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• Active PPA for latest stable chromium? [closed]

  - by trmpa

  Possible Duplicate: How to install the latest stable version of Chromium? I run chromium and used this PPA: https://launchpad.net/~chromium-daily/+archive/stable I just realized that it seems to be abandoned and I'm running a quite outdated version of this browser. There have not been any updates since the first of May this year. Do you know of any PPA thats actively maintained? Thanks, trmpa (Yes, I know, I could use google chrome but i would like to go with chromium if possible. Building from source is also not a good option. It's not my own machine and I need updates to work reliably without much intervention from the user)

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• Steps to rebuild gspca_kinect driver module?

  - by Bobby Ray

  I recently purchased a Kinect for Windows and quickly discovered that the camera drivers included in linux kernel 3.0+ aren't compatible with the Kinect for Windows hardware revision. After looking at the source code it seems like a tiny modification is all that is required for compatibility, so I've been trying to recompile the driver - to no avail. I've been referring to this article and this one as well, though they are a bit outdated. When I try to compile the module, I get an error because the header file "gspca.h" can't be found in the include path. I located the missing header in my filesystem, but the file itself is empty. I've also tried downloading the kernel source (3.2.0-24-generic), which allowed me to compile the module, but when I load the module I get an error. -1 Unknown symbol in module Is there a standard way to go about this without first building the kernel? Will building the kernel ensure that I can build the module? Thanks

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• Marching squares: Finding multiple contours within one source field?

  - by TravisG

  Principally, this is a follow-up-question to a problem from a few weeks ago, even though this is about the algorithm in general without application to my actual problem. The algorithm basically searches through all lines in the picture, starting from the top left of it, until it finds a pixel that is a border. In pseudo-C++: int start = 0; for(int i=0; i<amount_of_pixels; ++i) { if(pixels[i] == border) { start = i; break; } } When it finds one, it starts the marching squares algorithm and finds the contour to whatever object the pixel belongs to. Let's say I have something like this: Where everything except the color white is a border. And have found the contour points of the first blob: For the general algorithm it's over. It found a contour and has done its job. How can I move on to the other two blobs to find their contours as well?

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• How do you choose a programming/data structure/algorithm book?

  - by Fanatic23

  I really should not be mentioning the name of the book, but the first time I read it (during my under-grad days) I almost concluded that data structure was a bad course to pick. Which brings me to the question I am asking here. What makes a programming or data structure or algorithm book tick? Clearly, lucid explanation is one. But I also realize that organization of the material is very important and so is diagrams. What else? Some pointers would obviously help when I hang out in my neighborhood computer book shop the next time.

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• Brightness problem NC110 (Samsung)

  - by user40532

  Translated into English Hello everyone. It looks like I'm not the first person to have this problem, but since I'm new in the Ubuntu community, I don't know how to launch the terminal. There you have it; I have a NC110 (Samsung) and I'm not able to tweak the screen's brightness. What are the steps to follow? Original question in French: Bonjour à tous. Apparemment je ne suis pas le seul à avoir ce problème mais je suis tout nouveau dans la communauté ubuntu. Donc je ne sais pas comment accéder à la commande pour entrer les divers codes... Voilà, j'ai un NC110 (samsung) et je n'arrive pas à modifier la puissance de l'éclairage de l'écran. Quelle est la marche à suivre?

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• Rules of Holes #2: You Are Still in a Hole

  - by ArnieRowland

  OK. So you followed the First Rule of Holes -you stopped digging yourself in deeper. But now what? You are still in a Hole. Your situation has not changed much, but at least you are no longer making it worse. You need to redirect the digging effort into escape and avoidance efforts. The Hole has a singular purpose -consuming all of your time and effort. AND it has succeeded! But now you are going to redirect your efforts for your own survival. You have encountered the Second Rule of Holes: When you...(read more)

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• Ubuntu Variant / Linux Distros which uses least system resources (RAM, CPU)?

  - by elegantonyx

  I have a netbook (an older Asus EEEPC 1005HA) which I want to get rid of Windoze on (I like Windows, but I don't think it works well in a netbook environment). Basically, my question is which Ubuntu variant will use the least RAM and CPU running idle, and/or the same question except when running Firefox and Libreoffice Writer, say. I am also open to suggestions of non-Ubuntu Linux distros, but since this is AskUbuntu I thought the first question would be more appropriate. I have a disk drive which I can attach to the netbook, so it doesn't have to be a Ubuntu Variant / Linux Distro which solely boots from a USB drive. I have at my disposal: DVDs, DVD writer/ disk drive, 4gb flash drive, 8 gb flash drive I was thinking either Lubuntu or Archbang / Crunchbang but I would like some help from more knowledgable people Specs: Can't boot into it right now, but I think I have either Intel Atom N270 @1.60ghz OR Intel Atom N280 @1.66ghz (single core, I think) 2gb RAM 160 GB hard drive

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• Youtube showing horizontal lines when full screen in google chrome

  - by Blaze Tama

  First, im new in ubuntu so please bear with me. My google chrome shows strange behavior when playing youtube videos in full screen mode. There will be some horizontal white lines, which is exactly like when you playing the game without the vsync. I've checked firefox and the videos working perfectly in there. I also tried to play videos from my HDD using VLC player and its working fine. It seems the problem is in the google chrome alone. My version of ubuntu is 13.04, my laptop is asus n46vz and i use the latest release of google chrome. I've tried to ask google, but it seems he has no answer. Thanks for your time :D

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• Figuring out what object is closer to a certain point?

  - by user1157885

  I'm trying to create fog of war, I have the visual effect created but I'm not sure how to deal with the hiding of other players if they're within the fog of war. So right now the thing I'm trying to do is if another player is hiding behind a wall then not to render that player. I was thinking of doing it by sending a ray in the direction of all the players, and then creating a list of all the obstacles that ray collides with and then trying to figure out if an obstacle was closer than the player in order to predict the distance. But then I realized I'm not really sure how to figure out if the obstacle is infact closer or not because I have to account for all the dimensions, so I'm kind of stuck. First of all is this approach the correct way to go about it and secondly how would I calculate if the obstacle was infact closer taking into account the X Y and Z. Thanks

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• JCP Elections, JUG Candidates

  - by Tori Wieldt

  The JCP elections for the JCP Executive Committee (EC) have started today. The ratified candidates are:  Cinterion, Credit Suisse, Fujitsu and HP.The elected candidates are (9 candidates, 2 open seats):  Cisco Systems, CloudBees, Giuseppe Dell'Abate, Liferay, London Java Community, MoroccoJUG, North Sixty-One, Software AG, and Zero Turnaround. For community representation, the London Java Community is running for re-election. They have helped with JUGs participation on the JCP, and they need community votes to stay there doing great work! Also, the Morroco JUG is running for election for the first time.  Learn more about the JCP Elections, read the JCP Program Office blog "2012 EC Election Ballot open; Meet the Candidates Call Tomorrow." So, please, if you are a registered JCP member, don't forget to cast your vote!

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• How to setup a wifi ap hotspot with ipv6 support?

  - by keyman

  How to setup a wifi ap (access point mode) hotspot, with IPv6 support? I've set up a hotspot according to the guide to wifi ap hotspot setup and it works fine. But via the hotspot I failed to visit IPv6 websites. How can I setup a hotspot able to share Ipv6 Internet access? Thanks! Further: Actually I've tried to setup IPv6 forwarding and masquerading. First enabling IPv6 forwarding: echo 1 | sudo tee net/ipv6/conf/default/forwarding Then I tried to execute: sudo ip6tables -t nat -A POSTROUTING -s 2001:db8:0:1::/64 -o eth0 -j MASQUERADE But it gave me an error: ip6tables v1.4.12: Couldn't load target `MASQUERADE':No such file or directory I searched through the Internet but I get confused. So I'm here for help. Thanks!

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• Announcement: Federal Financial Briefing

  - by jeffrey.waterman

  Dear Oracle/PeopleSoft Federal Financial Management Customers: Oracle is pleased to announce that we will conduct the next Federal Financial Management Briefing on Tuesday, April 17th from 8:30 am until 2:00 pm at the Oracle Campus in Reston, Virginia. The Registration Link and Agenda can be found at the web site below: Federal Financial Briefing: Register Here Directions to Oracle Reston: From the Beltway take the Dulles Toll Road (Route 267 West). Do not get on the Dulles Access Road or you will not be able to exit until you get to the airport. Take the Reston Parkway Exit (Exit 12). At the end of the exit ramp, turn right onto Reston Parkway. Make your first right onto Sunset Hills Road. Take a Right turn onto Oracle Way and park in Visitor Parking. The receptionist will direct you to the CAB.

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• Virtual hosting

  - by H3llGhost

  Hello, I want to use domains like xxx.abc.domain.tld. The xxx is my folder to access. I tried it with the rewrite rules, but I can't get it working, because I don't know how to get the part xxx from the SERVER_NAME into my RewriteRule. This was my try: UseCanonicalName Off # include the IP address in the logs so they may be split LogFormat "%A %h %l %u %t \"%r\" %s %b" vcommon CustomLog /var/log/apache2/vaccess.log vcommon RewriteEngine On # a ServerName derived from a Host: header may be any case at all RewriteMap lowercase int:tolower ## deal with normal documents first: # do the magic RewriteCond ${lowercase:%{SERVER_NAME}} ^.+\.abc\.domain\.tld$ RewriteRule ^(.*)$ /var/www/abc.domain.tld/[xxx-part]/$1 [L] Perhaps there is a better solution. In generally I want to create a dynamic login system with mod_auth_mysql and for each xxx is a seperate user database. I would prefer the domain/address syntax abc.domain.tld/xxx, but I don't know how to realize it. Thanks for any advices.

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