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• Can I get some advice on graphics cards please?

  - by Victor9098

  I know that Steam for linux is on the way and have been seen a lot of games appearing in the Ubuntu Software Centre of late but my system lacks a decent graphics card and was hoping I could get some recommendations. The desktop is a Packard Bell Imedia S1800 (or Imedia D3526 UK) with the following specs; Memory: 3.8 GiB Processor: Pentium(R) Dual-Core CPU E5800 @ 3.20GHz × 2 The system lists the graphics as 'unknown', though I think its just an integrated Intel card From what I can see there is a free PCI-E x16 slot. Any advice would be great, thanks!

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• (Phaser) Preload Future States in Create?

  - by Brian

  I'm a first time user of Phaser, been trying to make a simple point and click type game. I'm trying to keep things very modular, so I'm defining a list of levels (states) in a JSON, and then every level has its own JSON containing the objects within that level. However, I'm encountering an issue in that, when changing states, I get a black flash while the assets for the next state load (this happens whether I iterate through the JSON list or define everything manually). From what I've read, all sprites should be loaded in the preload stage, however, by doing this I'm causing that tiny but noticeable black pause. I know one way would be to simply load every asset at the start of the game, but that seems incredibly inefficient (wouldn't that fill up the memory immensely?). I would rather load a state's assets from the "parent" state. However, in my quick test (which maybe I did wrong) it seems that game.load doesn't work properly if done within the create stage? What is the best approach to doing this?

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• Kernel Error When Upgrade 12.10 - VMWare has install in 12.04

  - by sepdau

  I have already upgraded Ubuntu 12.10 from 12.04. I have remove old kernel 3.2.21 in 12.04 ver. On my starting up it have error before login I see a error "vmware ...." In 12.04 I have install vmware 9.0 and in 12.10 when I open vmware workstation to start a virtual machine it error my monito going to black and I must logout and login angain. How to fix it? I related to vmware and kernel or not. Thank for helping!

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• Coherence on YouTube

  - by jeckels

  As we're busy preparing the next version of Coherence for you to enjoy, don't forget you can always take a peek at our YouTube channel for customer testimonials, how-to tutorials and a plethora of content around the #1 in-memory solution across conventional and cloud environments. Spoiler alert: we have a bunch more coming very soon. Stay tuned... Also, don't forget to join us at Oracle Open World in September for in-depth sessions on Coherence and other Fusion Middleware products. We look forward to seeing you there! 

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• How does a linked library combined with the main executable program file interact with a kernel?

  - by I ask Questions For a Reason

  I was attempting to find an answer to this, and I did to some degree, but definitely not anywhere good enough to form a respectable, sensible and clear answer. If I am using Windows, Mac, Linux, or nearly any modern made OS for desktop IBM-compatible PCs, laptops, even tablets and smartphones, there's virtual memory. Clearly, compiling, at least on Windows I know this, an executable object file, such as a simple C "Hello World" output to a terminal, will be linked with the standard library, and several other Window's system software, dynamic linked libraries, and the like. However, how does linking all of these executables together or resources form a connectable interaction with, say, a device driver or any other stuff on the lower level?

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• Wait random number of minutes

  - by TiborKaraszi

  Why on earth would you want to do that? you ask. Say you have a job that is scheduled to start at the same time over a number of servers. This might be because you have an SQL Server Master/Target server environment (MSX/TSX) or you quite simply script a job and execute that script on several servers. You probably want to spread the load on your SAN and virtual machine host a bit. This is the exact reason I use this procedure. I frequently use MSX servers and I usually add a job step (executing this...(read more)

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• Missing Firefox app icon

  - by frozenkoi

  I'm using Ubuntu 11.04 (upgraded from LTS 10.04) and Firefox (version 11) doesn't show it's icon in the Window List panel, in the Firefox window top left corner (system menu) nor when using ALT+TAB to switch applications. I'm using unity 2D since I'm running ubuntu as a guest in a VMWare virtual machine (Host is windows 7) Instead of the Firefox icon I get what appears to be a generic icon that looks like an app window in the window list and a black rectangle with a curl in the bottom right corner in the ALT+TAB window. How do I fix this so that the proper Firefox icon gets displayed? EDIT: Depending on the icon set chosen in the Appearence settings window sometimes I get the icon, sometimes I don't. When using Ubuntu classic none of the icon sets provide the icon for Firefox.

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• Does low latency code sometimes have to be "ugly"?

  - by user997112

  (This is mainly aimed at those who have specific knowledge of low latency systems, to avoid people just answering with unsubstantiated opinions). Do you feel there is a trade-off between writing "nice" object orientated code and writing very fast low latency code? For instance, avoiding virtual functions in C++/the overhead of polymorphism etc- re-writing code which looks nasty, but is very fast etc? It stands to reason- who cares if it looks ugly (so long as its maintainable)- if you need speed, you need speed? I would be interested to hear from people who have worked in such areas.

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• nicstat update - version 1.92

  - by user12608033

  Another minor nicstat release is now available. Changes for Version 1.92, October 2012 Common Added "-M" option to change throughput statistics to Mbps (Megabits per second). Suggestion from Darren Todd. Fixed bugs with printing extended parseable format (-xp) Fixed man page's description of extended parseable output. Solaris Fixed memory leak associated with g_getif_list Add 2nd argument to dladm_open() for Solaris 11.1 Modify nicstat.sh to handle Solaris 11.1 Linux Modify nicstat.sh to see "x86_64" cputype as "i386". All Linux binaries are built as 32-bit, so we do not need to differentiate these two cpu types. Availability nicstat source and binaries are available from sourceforge. History For more history on nicstat, see my earlier entry

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• What is the primary use of Vertex Buffer Objects?

  - by sensae

  From what I've read, it seems VBOs are purely for performance. I'm working on a very rudimentary learning project in lwjgl and I'm just trying to figure out what more advanced features of the library I should be delving into, and what their use is. My understanding is that VBOs allow a person to keep vertexes in VRAM while they aren't currently being drawn in a scene. In my case, I'm just drawing quads and performance probably isn't a concern at all, but I'm trying to piece together what's happening under the hood. If I'm drawing quads directly, I'm drawing from the CPU memory, correct? Also, if I'm not doing any checks for visibility, does that mean I'm rendering absolutely everything in the "scene", regardless of whether its in view? Are VBOs a way to store objects and only render what's needed?

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• Why is it good not to rely on changing state?

  - by Slomojo

  This question arises out of the question Is Haskell worth learning? Generally a few often repeated statements are made, about how Haskell improves your coding skills in other languages, and furthermore, this is because Haskell is stateless, and that's a good thing. Why? I've seen someone compare this to only typing with the left hand, or perhaps closing your eyes for a day and just relying on touch. Surely there is more to it than that? Does it relate to hardware memory access, or something else which is a big performance gain?

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• How to access variables of uninitialized class?

  - by oringe

  So I've gone with a somewhat singleton approach to my game class: #include "myGame.h" int main () { myGame game; return game.Execute(); } But now I need to define a class that accesses variables in the instance of myGame. class MotionState { public: virtual void setWorldTransform (...) { VariableFromMyGameClass++; //<-- !? ...} }; I'm trying to integrate this class into my project from an example that just uses globals. How can I access variables of myGame class in the definition of new classes? Should I give up on my singleton approach?

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• Virtualbox Kernel driver not installed

  - by Cyndi

  I tried to use my Virtual Box and this is the error I received - (I just updated to the new Ubuntu also) and I am VERY new at this Linux OS :) Kernel driver not installed (rc=-1908) The VirtualBox Linux kernel driver (vboxdrv) is either not loaded or there is a permission problem with /dev/vboxdrv. Please reinstall the kernel module by executing '/etc/init.d/vboxdrv setup' as root. Users of Ubuntu, Fedora or Mandriva should install the DKMS package first. This package keeps track of Linux kernel changes and recompiles the vboxdrv kernel module if necessary.

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• Rendering trillions of "atoms" instead of polygons?

  - by Baring

  I just saw a video about what the publishers call the "next major step after the invention of 3D". According to the person speaking in it, they use a huge amount of atoms grouped into clouds instead of polygons, to reach a level of unlimited detail. They tried their best to make the video understandable for persons with no knowledge of any rendering techniques, and therefore or for other purposes left out all details of how their engine works. The level of detail in their video does look quite impressive to me. How is it possible to render scenes using custom atoms instead of polygons on current hardware? (Speed, memory-wise) If this is real, why has nobody else even thought about it so far? I'm, as an OpenGL developer, really baffled by this and would really like to hear what experts have to say. Therefore I also don't want this to look like a cheap advert and will include the link to the video only if requested, in the comments section.

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• Getting Started with the SSAS Tabular Model

  SSAS Tabular models are in-memory databases that model data with relational constructs such as tables and relationships, in order to provide a rapid and powerful way of providing self-service BI to client applications such as Microsoft Excel and Microsoft Power View. You’ve deployed SSAS in tabular mode, and deployed Adventureworks into it. What next? Rob Sheldon explains all. Check SQL Server performance at a glanceWe consulted 1000 SQL Server professionals to make SQL Monitor’s UI as clear as possible. Start monitoring with a free trial.

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• Data structure for file search

  - by poly

  I've asked this question before and I got a few answers/idea, but I'm not sure how to implement them. I'm building a telecom messaging solution. Currently, I'm using a database to save my transaction/messages for the network stack I've built, and as you know it's slower than using a data structure (hash, linkedlist, etc...). My problem is that the data can be really huge, and it won't fit in the memory. I was thinking of saving the records in a file and the a key and line number in a hash, then if I want to access some record then I can get the line number from the hash, and get it from the file. I don't know how efficient is this; I think the database is doing a way better job than this on my behalf. Please share whatever you have in mind.

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• How to install texlive2011?

  - by vrx

  I just moved from Windows to Ubuntu. Software Center in Ubuntu does have texlive2009 package. There is no straightforward installation process from TUG, or from Google search result. I found some installation of Texlive2010 but it does not work. Here are the step: download an texlive2011.iso, 2.3GB and save in local drive mount to a virtual drive install perl tk (ok) "sudo ./install-tl" does not work, "perl ./install-tl" shows pre-installation setting but it does not have the write access to /usr/local/textlive/2011/ Finally, I'm stuck Please guide me with a step by step tutorial or suggest any other solution beside typing in the black screen without knowing what is going on behind the Terminal.

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• Announcing Oracle WebLogic 12c

  - by alexismp

  While this blog is mostly devoted to GlassFish, you may be interested in the Oracle WebLogic Server 12c announcement scheduled for December 1st, 2011. The launch event is called "Introducing Oracle WebLogic Server 12c, the #1 Application Server Across Conventional and Cloud Environments" and will be split into Executive Overview and Developer Deep Dive sessions. The agenda description includes the following (emphasis is mine) : • Optimized to run your solutions for Java Platform, Enterprise Edition (Java EE); Oracle Fusion Middleware; and Oracle Fusion Applications • Enhanced with transformational platforms and technologies such as Java EE 6, Oracle’sActive GridLink for RAC, Oracle Traffic Director, and Oracle Virtual Assembly Builder On a slightly less official note but on that same topic, you should check out Steve Button's blog and twitter stream.

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• Microsoft Releases Windows Server 2012

  Windows Server 2012 offers expanded virtualization capabilities and works with Windows Azure, the software company's cloud platform. It can deliver more than 200 public, private and hybrid cloud services. The goal seems to be to deliver any application on any cloud. Rand Morimoto, president of Microsoft partner Convergent Computing, sees a number of major selling points for Windows Server 2012. For instance, its deduplication features can save a company 40 to 50 percent in storage space. Its automated IT management capabilities enable it to manage a large number of virtual machines. It can eve...

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• Auth succeeded No requires line available

  - by user286223

  Upgrading to Ubuntu 14.04 (and Apache2 2.4) server I can't use MySQL as htaccess; Before upgrading I was using MySQL as htaccess in the virtual host - worked nicely: <Directory /var/www/html/tilmelding/login> AuthBasicAuthoritative Off AuthUserFile /dev/null # begin auth_mysql configuration AuthMySQL On AuthMySQL_Host localhost AuthMySQL_User ********** AuthMySQL_Password ********* AuthMySQL_DB ********** AuthMySQL_Password_Table user_info AuthMySQL_Username_Field user_name AuthMySQL_Password_Field user_passwd AuthMySQL_Empty_Passwords Off AuthMySQL_Encryption_Types PHP_MD5 AuthMySQL_Authoritative AuthType Basic AuthName "auth_mysql test" Require valid-user After upgrade it didn’t work. In the logfile I got: [:debug] [pid 31333] mod_auth_mysql.c(1578): Constructing password collection query with passfield=[user_passwd], table=[user_info], userfield=[helgoland], where_clause=[] [:debug] [pid 31333] mod_auth_mysql.c(1410): sec->dbh in /var/www/html/tilmelding/login/ is [:debug] [pid 31333] mod_auth_mysql.c(1417): Ordinary query [:debug] [pid 31333] mod_auth_mysql.c(1434): Running query: [SELECT user_passwd FROM user_info WHERE user_name='helgoland'] [:debug] [pid 31333] mod_auth_mysql.c(1522): Checking with PHP_MD5 [:debug] [pid 31333] mod_auth_mysql.c(1524): Auth succeeded [:error] [pid 31333] No requires line available I am able to do the query from CLI and get an MD5 back. What have I missed ?

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• Issues with HP Mini 110-1125NR

  - by Guga Figueiredo

  Just finished installing Ubuntu 12.04 Precise Pangolin on my HP Mini 110-1125NR and im having small, but rather irritating issues. I installed it over the Windows 7 (starter) which came with the netbook. Firstly, it will only boot from the USB flashdisk. If i try to boot from the hardrive, it goes to a black screen. Second, built-in wireless wont activate. system says its enabled and on, but the light indicator is still orange (as if its off), and i cant get a signal from my home wi-fi I havent found any solved threads for inspiration, and mos of them are pretty old (1 year +) so i thought of giving a try to see if any of you guys System is: HP Mini 110-1100 1gb memory Intel Atom CPU N270 @ 1.60GHz x 2 Os - Precise Pangolin - Ubuntu 12.04 160gb Hard disk If any of you are aware of the solutions of my issues it'd be awesome Thanks in advance for any help!

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• Setting folder permission so it isn't deletable, but everything else is allowed

  - by user10324

  I want to set permissions to a folder such that, when I'm normally logged in (meaning not as root), this folder isn't deletable, but I can still change the name of this folder and move in around in my system ? IS this possible and if yes, how to set the permission ? I already tried different combinations for the permissions but couldn't figure out how to do it. Also (side question), if some folder hast some permission set and I copy this folder, along with its contents (assuming I am allowed to read it) to a memory, are these permission preserved ? I suppose not, since under Windows I could delete the folder on the stick, even if under Ubuntu it isn't allowed to delete it...

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• Implementing cache system in Java Web Application

  - by TGM

  I worked with JPA (Eclipselink implementation) and Hibernate. As I understand these two have great caching systems. I am interested in caching in a Web application and in order to better understand the process I'm trying to implement something on my own. Sadly, I cannot find any in depth documentation about this subject. I'm interested in things like high scalability, sharing memory on different machines and other important theoretical matters. Is there any tutorial or open project I could check out? Thank you! *LE: * I want to cache DB information in POJOs just like JPA or Eclipselink

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• Webcast: Extreme Analytics Without Limits

  - by Rob Reynolds

  Event Date: November 8, 2012 Event Time: 1 p.m. PT / 4 p.m. ET If you are a current Oracle Business Intelligence Applications customer, or thinking about implementing the BI Apps, please join us for this Webcast to learn how the combination of Oracle Exalytics In- Memory Machine and Oracle’s market leading analytic applications enables you to go beyond the traditional boundaries of data analysis and get the insight you need from massive volumes of data – all at the speed of thought. See how you can benefit from running your analytic applications on Oracle Exalytics to: Lower TCO Improve Operational Decision Making and Enhance Competitive Advantage Deliver Speed-of-thought Analysis – Anytime, Anywhere Click here to register.

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• What is the most secure environment for multiple CMS sites? [closed]

  - by Brian Gulino

  I wish to run about 50 Joomla or WordPress low-traffic websites on 1 server, or part of a server. Each website will be managed by its own, naive owner who will have be able to access the Joomla or Wordpress backend of the website. I am concerned about security and isolation as my users will periodically get into trouble by not protecting their sites properly. Two alternatives I know of exist: Run one Linux system with multiple websites under Apache. Follow current Joomla and WordPress security tips. Increase the isolation of the individual sites by using mpm-itk, which will allow each website to run as its own user. The alternative to this is to run virtualization software such as the Xen hypervisor. Each site would have its own, virtual Linux system. I lack the experience needed to make this decision and I am asking which path to take. Obviously, there may be other alternatives that I haven't considered.

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