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• Do I need to uninstall lxde before installing kde-standard?

  - by A Roy

  I have ubuntu 12.04 (upgraded from 10.04) and since I disliked the default desktop, I installed lxde (sudo apt-get install lxde). This was good except that occasionally there would be trouble with Firefox (blinking on panel) so that finally I had to close it and then a error message from Ubuntu was issued. I had asked about it before but there was no useful response so now I want to move to another desktop which will hopefully not create the problem I have now. My doubt is, should I first uninstall lxde and then install kde (sudo apt-get install kde-standard) or is it enough to install kde without uninstalling lxde? In case it is necessary to uninstall, should I use the command sudo apt-get remove lxde or is there a better command for it? You may also help me with choice of desktop. I installed lxde since this is simple and lightweight. I am assuming that kde will not be as simple but hopefully not create problem like above. But I hate if it takes too long to log in or to launch a program like Firefox etc and also there should not be icons fixed on the left part of terminal (I hate to keep icons on desktop since these are distracting). Some of these issues were present with default Ubuntu 12.04. So is my choice of kde-standard appropriate or are there better desktop alternatives?

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• Fixed-Function vs Shaders: Which for beginner?

  - by Rob Hays

  I'm currently going to college for computer science. Although I do plan on utilizing an existing engine at some point to create a small game, my aim right now is towards learning the fundamentals: namely, 3D programming. I've already done some research regarding the choice between DirectX and OpenGL, and the general sentiment that came out of that was that whether you choose OpenGL or DirectX as your training-wheels platform, a lot of the knowledge is transferrable to the other platform. Therefore, since OpenGL is supported by more systems (probably a silly reason to choose what to learn), I decided that I'm going to learn OpenGL first. After I made this decision to learn OpenGL, I did some more research and found out about a dichotomy that I was somewhere unaware of all this time: fixed-function OpenGL vs. modern programmable shader-based OpenGL. At first, I thought it was an obvious choice that I should choose to learn shader-based OpenGL since that's what's most commonly used in the industry today. However, I then stumbled upon the very popular Learning Modern 3D Graphics Programming by Jason L. McKesson, located here: http://www.arcsynthesis.org/gltut/ I read through the introductory bits, and in the "About This Book" section, the author states: "First, much of what is learned with this approach must be inevitably abandoned when the user encounters a graphics problem that must be solved with programmability. Programmability wipes out almost all of the fixed function pipeline, so the knowledge does not easily transfer." yet at the same time also makes the case that fixed-functionality provides an easier, more immediate learning curve for beginners by stating: "It is generally considered easiest to teach neophyte graphics programmers using the fixed function pipeline." Naturally, you can see why I might be conflicted about which paradigm to learn: Do I spend a lot of time learning (and then later unlearning) the ways of fixed-functionality, or do I choose to start out with shaders? My primary concern is that modern programmable shaders somehow require the programmer to already understand the fixed-function pipeline, but I doubt that's the case. TL;DR == As an aspiring game graphics programmer, is it in my best interest to learn 3D programming through fixed-functionality or modern shader-based programming?

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• Domain transfer and New Hosting Management

  - by Anubhav Saini

  I wanted to migrate from my older registrar to GoDaddy. Main reason because current registrar/hosting provider doesn't support .NET. My old registrar gave me control over the domain and hosting account. So, basically I have everything I would need. ( I know theory only ) I applied for Transfer of domain, bought a hosting package from GoDaddy and uploaded new web site. So, I am waiting for domain transfer and it tells me that I have to wait for 5-7 days for approval. Okay. But today, my old registrar told/taunted me that I really didn't need to apply for transfer. What could possibly I have done differently? My domain expires on this 15th. Now I don't know much about how all of this really works, but I am guessing he meant, "you should have waited for 15 days and let it expire after which you should buy the domain as it is expired". Is it really so(I doubt) or there are some other ways I could have got same result but without transferring domain? (like, changing DNS entries) I have read like all of the documentation available on namecheap/GoDaddy/Whois about domain transfers. But maybe because I am new to this it is all confusing to me. I would also like to know what to do with DNS settings after transfer succeeds. I want to kill the old website. So, what nameserver settings I need to change, new one or old one or both? I have old host+old domain registrar + old working site on one hand, on the other hand, new site + pending domain transfer + new DNS settings.

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• Problem with DirectX scene-graph

  - by Alex

  I'm trying to implement a basic scene graph in DirectX using C++. I am using a left child-right sibling binary tree to do this. I'm having trouble updating each node's world transformation relative to its parent (and its parent's parent etc.). I'm struggling to get it to work recursively, though I can get it to work like this: for(int i = 0; i < NUM_OBJECTS; i++) { // Initialize to identity matrix. D3DXMatrixIdentity(&mObject[i].toWorldXForm); int k = i; while( k != -1 ) { mObject[i].toWorldXForm *= mObject[k].toParentXForm; k = mObject[k].parent; } } toWorldXForm is the object's world transform and toParentXForm is the object's transform relative to the parent. I want to do this using a method within my object class (the code above is in my main class). This is what I've tried but it doesn't work (only works with nodes 1 generation away from the root) if (this->sibling != NULL) this->sibling->update(toParentXForm); D3DXMatrixIdentity(&toWorldXForm); this->toWorldXForm *= this->toParentXForm; this->toWorldXForm *= toParentXForm; toParentXForm *= this->toParentXForm; if (this->child != NULL) this->child->update(toParentXForm); Sorry if I've not been clear, please tell me if there's anything else you need to know. I've no doubt it's merely a silly mistake on my part, hopefully an outside view will be able to spot the problem.

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• Can anyone recommend an AI sandbox?

  - by user19433

  I'm passionate person, who has been around AI from a long time [1] but never going in deep enough. Now it's time! I've been really looking for some way to concentrate on AI coding but couldn't succeeded to find an AI environment I can focus on. I just want to use an AI sandbox environment which would let me have tools like: visibility information character controller able to easily define a level, with obstacles of course physics collider management triggers management don't need to be a shiny, eye candy graphical render : this is about pathfinding, tactical reasoning, etc.. I have tried : Unreal Dev Kit : while the new release announce is about C++ coding, this is about external tools and will be released in 2013 Cry Engine : really interesting as AI is presents here but coding with it appears to be an hell: did I got it wrong ? Half Life source, C4, Torque, Dx Studio : either quite old, not very useful or costly these imply to dig in documentation (when provided) to code everything, graphics included. Unity 3D : the most promising platform. While you also need to create your own environment, there are lot of examples. The disadvantage is, in addition to spend time to have this env. working, is the languages choice : C#, Javascript or Boo. C# is not that hard, but this implies you'll allways have to convert papers (I love those from Lars Linden) books codes, or anything you can have in Aigamedev are most often in C++. This is extra work. I've look at "Simple Path", the very good Arong Greenberg work but no source provided and AngryAnt work. AI Sandbox : this seems to be exactly what as AI coder I want to use. I saw some preview but from 2009 we still don't know what it will be about precisely, will it be opensource or free (I strongly doubt), will I be able to buy it? will it really provide me tools I need to focus on AI ? That being said, what is the best environment to be able to focus on AI coding only, is it even possible?

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• An adequate message authentication code for REST

  - by Andras Zoltan

  My REST service currently uses SCRAM authentication to issue tokens for callers and users. We have the ability to revoke caller privileges and ban IPs, as well as impose quotas to any type of request. One thing that I haven't implemented, however, is MAC for requests. As I've thought about it more, for some requests I think this is needed, because otherwise tokens can be stolen and before we identify this and deactivate the associated caller account, some damage could be done to our user accounts. In many systems the MAC is generated from the body or query string of the request, however this is difficult to implement as I'm using the ASP.Net Web API and don't want to read the body twice. Equally importantly I want to keep it simple for callers to access the service. So what I'm thinking is to have a MAC calculated on: the url, possibly minus query string the verb the request ip (potentially is a barrier on some mobile devices though) utc date and time when the client issues the request. For the last one I would have the client send that string in a request header, of course - and I can use it to decide whether the request is 'fresh' enough. My thinking is that whilst this doesn't prevent message body tampering it does prevent using a model request to use as a template for different requests later on by a malicious third party. I believe only the most aggressive man in the middle attack would be able to subvert this, and I don't think our services offer any information or ability that is valuable enough to warrant that. The services will use SSL as well, for sensitive stuff. And if I do this, then I'll be using HMAC-SHA-256 and issuing private keys for HMAC appropriately. Does this sound enough? Have I missed anything? I don't think I'm a beginner when it comes to security, but when working on it I always. am shrouded in doubt, so I appreciate having this community to call upon!

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• How to make Unity 3D work with Bumblebee using the Intel chipset

  - by EboMike

  I have a Sony VAIO S laptop with the dreaded Optimus and finally managed to get Bumblebee to work fully on Ubuntu 12.04 so that I can utilize both the hardware acceleration of the Intel chipset as well as the Nvidia one via optirun and/or bumble-app-settings. However, the desktop effects don't work. But they should, I vaguely remember that they worked for a while before I had Bumblebee installed. This is what I get with the support test: :~$ /usr/lib/nux/unity_support_test -p Xlib: extension "NV-GLX" missing on display ":0". OpenGL vendor string: Tungsten Graphics, Inc OpenGL renderer string: Mesa DRI Intel(R) Ivybridge Mobile OpenGL version string: 1.4 (2.1 Mesa 8.0.2) Not software rendered: yes Not blacklisted: yes GLX fbconfig: yes GLX texture from pixmap: yes GL npot or rect textures: yes GL vertex program: yes GL fragment program: yes GL vertex buffer object: no GL framebuffer object: yes GL version is 1.4+: yes Unity 3D supported: no First of all, I kind of doubt that the chipset doesn't support VBOs (essentially a standard feature in GL). Neither Xorg.0.log nor Xorg.8.log show any particular errors. As for the Nvidia drivers: In order to get them to work, I had to install the 304.22 drivers (older ones wouldn't work). They clobbered libglx.so, so I reinstated the xserver-xorg-core libglx.so in its original place, moved Nvidia's libglx.so to an nvidia-specific folder and specified that folder in the bumblebee.config. That seems to work and shouldn't cause the problem I see here. For fun, I tried to use the Nvidia chipset for Unity, but that didn't fly either: ~$ optirun /usr/lib/nux/unity_support_test -p OpenGL vendor string: NVIDIA Corporation OpenGL renderer string: GeForce GT 640M LE/PCIe/SSE2 OpenGL version string: 4.2.0 NVIDIA 304.22 Not software rendered: yes Not blacklisted: yes GLX fbconfig: yes GLX texture from pixmap: no GL npot or rect textures: yes GL vertex program: yes GL fragment program: yes GL vertex buffer object: yes GL framebuffer object: yes GL version is 1.4+: yes Unity 3D supported: no

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• How do I start my career on a 3-year-old degree [on hold]

  - by Gabriel Burns

  I received my bachelor's degree in Com S (second major in math) in December 2011. I didn't have the best GPA (I was excellent at programming projects and had a deep understanding of CS concepts, but school is generally not the best format for displaying my strengths), and my only internship was with a now-defunct startup. After graduation I applied for several jobs, had a fair number of interviews, but never got hired. After a while, I got somewhat discouraged, and though I still said I was looking, and occasionally applied for something, my pace slowed down considerably. I remain convinced that software development is the right path for me, and that I could make a real contribution to someones work force, but I'm at a loss as to how I can convince anyone of this. My major problems are as follows. Lack of professional experience-- a problem for every entry-level programmer, I suppose, but everyone seems to want someone with a couple of years under their belt. Rustiness-- I've not really done any programming in about a year, and since school all I've really done is various programming competitions and puzzles. (codechef, hackerrank, etc.) I need a way to sharpen my skills. Long term unemployment-- while I had a basic fast-food job after I graduated, I've been truly unemployed for about a year now. Furthermore, no one has ever hired me as a programmer, and any potential employer is liable to wonder why. Old References-- my references are all college professors and one supervisor from my internship, none of whom I've had any contact with since I graduated. Confidence-- I have no doubt that I could be a good professional programmer, and make just about any employer glad that they hired me, but I'm aware of my red flags as a candidate, and have a hard time heading confidently into an interview. How can I overcome these problems and keep my career from being over before it starts?

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• How can I "diff" two files with Nautilus?

  - by bioShark

  I have installed Meld and found out it's a great comparing tool. Unfortunately there is no integration with Nautilus 3.2. This means, I can't right click on files and select an option to open them in Meld for comparison. I have seen in the tools comment that the tool need the diff-ext package to be installed. This package has been removed from Ubuntu universe, I am guessing because gtk 3.0. Even if I manually downloaded from source forge the diff-ext package, when I try to configure it the check fails with the message: checking for DIFF_EXT... configure: error: Package requirements (libnautilus-extension >= 2.14.0 gconf-2.0 >= 2.14.0 gnome-vfs-module-2.0 >= 2.14) were not met: No package 'libnautilus-extension' found No package 'gconf-2.0' found No package 'gnome-vfs-module-2.0' found Ok, so from this output I gather that indeed gtk 2 is being required to install the diff extension to nautilus. Now, my question is: Is there a possibility to integrate Meld into Nautilus? Or, are there any other diff based tool which integrate with current Nautilus? So gtk3 based. I am using Ubuntu 11.10 if there was any doubt so far. cheers and thanks in advance.

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• Does the google crawler really guess URL patterns and index pages that were never linked against?

  - by Dominik

  I'm experiencing problems with indexed pages which were (probably) never linked to. Here's the setup: Data-Server: Application with RESTful interface which provides the data Website A: Provides the data of (1) at http://website-a.example.com/?id=RESOURCE_ID Website B: Provides the data of (1) at http://website-b.example.com/?id=OTHER_RESOURCE_ID So the whole, non-private data is stored on (1) and the websites (2) and (3) can fetch and display this data, which is a representation of the data with additional cross-linking between those. In fact, the URL /?id=1 of website-a points to the same resource as /?id=1 of website-b. However, the resource id:1 is useless at website-b. Unfortunately, the google index for website-b now contains several links of resources belonging to website-a and vice versa. I "heard" that the google crawler tries to determine the URL-pattern (which makes sense for deciding which page should go into the index and which not) and furthermore guesses other URLs by trying different values (like "I know that id 1 exists, let's try 2, 3, 4, ..."). Is there any evidence that the google crawler really behaves that way (which I doubt). My guess is that the google crawler submitted a HTML-Form and somehow got links to those unwanted resources. I found some similar posted questions about that, including "Google webmaster central: indexing and posting false pages" [link removed] however, none of those pages give an evidence.

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• How can I make an unmounted / unmountable NTFS disk not show up in the nautilus devices area?

  - by Dennis

  I have an idea that my /etc/fstab is a real mish-mash and I don't remember how it got that way, first of all it looks like this UUID=9EB80807B807DD21 /media/Storage ntfs-3g users 0 0 UUID=a60397fd-964a-45b1-ad35-53c8a4bee010 / ext4 defaults 0 1 UUID=1764825d-b8ba-4620-b3b0-e979b6f4f5c4 swap swap sw 0 0 UUID=255DA1E406E29DBC /media/sda2 ntfs-3g defaults 0 0 UUID=2CCCF161CCF1262C /mnt/sda1 ntfs-3g umask=000 0 0 /dev/fd0 /media/floppy0 vfat noauto 0 0 I started with an old XP install on disk /dev/sda that I don't use anymore but didn't want to delete, so I shrunk the XP partition, added a NTFS partition that would be common to both systems (Labeled it "Common" in XP), then installed Lucid on an extended ext4 partition. On this disk of course the ext4 system partition comes up as /, the go between partition auto-mounts on /media/sda1 but shows up in Nautilus as COMMOM, while the XP system disk does not show up in Nautilus, but I can get to it by navigating to /mnt/sda1. A second hard drive (/dev/sdb) that I stuck in was already formatted NTFS with a bunch of stuff and labeled "Storage". It auto-mounts to /media/Storage but another un-mounted disk also shows up in the Nautilus device area called Storage but it can't be mounted (Here and in the "Places" are the only times it appears) I would primarily like this non-existant (or already mounted depending on how you look at it) disk to not show up, but I wouldn't mind an explanation of why one labeled partition auto-mounts to a /media mount point but shows up by label, one does not show up as mounted at all but mounts to a /mnt mount point and is there for navigation, and one is mounted to a directory of the same name as the label. I would love to have some consistancy / direction on what is proper in this circumstance. No doubt I caused this with the fstab but I really don't remember what my rational was if I edited it manually

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• Is it possible to to have all pre-unity effects in latest ubuntu?

  - by iamserious

  I've been an Ubuntu dilettante for a long, long time. It is not my primary OS but I've always had it on all my laptops and desktop machines for over 8 years now. What I really, really like(d) about ubuntu (or linux, for that matter) was the effects - desktop cube, wobbly windows and other such "cool" effects. Needless to say, I was heartbroken with Unity. I gave it the benefit of doubt and tried to like it, tried to love it. Stuck with it for over a year. But I recently came to the conclusion that unity is really not for me. I want my old ubuntu back, with all it's eye candy effects. I tried messing around with ccsm but it only seemed to make the matters worse. Now, I could just install the old version of ubuntu - but getting my bamboo pen and Nvidia to work with it is a son of a.. anyway, the point is, old version of ubuntu is outdated to work with my newer machines. I'd rather have a new version of ubuntu but without unity- I don't know what the eye candy stuff is called - and so my question is this - Is it possible to rid ubuntu of unity and get all the eye candy stuff and if it is not possible, can you please advice me what other linux supports all the effects, please? I've searched high and low for unity alternatives but didn't find any satisfactory solutions; so I think my question is mainly about what other linux flavour is better suited for the task - sorry if it is out of topic.

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• How do I (quickly) let people know that software I am providing for free is not abandon-ware?

  - by blueberryfields

  As an independent, individual programmer: How do I let people very quickly know that I have not abandoned the software I've written and given away for free? That I am putting in the effort required to maintain and support my software to a professional level? When software written by one or two developers is available for free, or marked as open-source, usually the default assumption is that it's abandon-ware. This is usually a safe assumption - check out the answers to this question if you doubt it: Why do programmers write applications and then make them free?. There are lots of programmers who provide free and/or open-source tools which are not abandon-ware, though. If we're talking about large companies, ie Google, there's no real problem telling the difference between supported, live tools and software, and those which are abandoned or discontinued. A lively git repository isn't quick - users will have to be savvy enough to understand the repository and know where to look for it. Consistent marketing and community management take more time and effort than I can put in on my own. Also, if my software becomes popular/successful, I assume those will grow on their own, and be supported by power users in the community.

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• How to stay productive? What time management software is available?

  - by andrewsomething

  So since I started using askubuntu.com I've spent entirely too much time here answering other people's questions. Now maybe someone could help me with that by answering this one. I'm looking for time management software for Ubuntu. There are a number of these programs floating around for Windows. RescueTime is one that is very popular. The key features that I'd like to see in a linux app that RescueTime has are: Automatically records what application you are using, including what websites you visit. Reports and graphs on your time usage. Notifications for when you have spent too much time on "distractions." While RescueTime doesn't officially support linux, there is an open source RescueTime Linux Uploader. Unfortunately, it seems to only support Firefox and Epiphany for website tracking. I'm a Chromium user. The other major drawback to RescueTime is that it is a web service. I'd much rather not upload detailed information about how I spend my time to some third party. Google already knows too much about me as it is. Project Hamster, a GNOME time management app, comes so close. Sadly, it does not automatically track what you are doing. If I had enough discipline to manually report to an applet what I was up to, I doubt I'd need this. (How cool would it be if they provided some Zeitgeist integration to handle that part?)

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• Naming your website longname.com vs shortcatchy.net vs shortcatchy.info

  - by jskye

  I'm designing a website that will basically be a social network for sharing information. I have the domain $$$$d.net and the same domain $$$$d.info where $$$$ is a word (that runs into the d) pertaining to the purpose of the site . The .com of this domain was already taken, but they've got nothing showing. They only have a not reached google error showing ie. dont seem to be trying to sell it either. I also have the long name of the site $$$$------&&&&&&&&&.com where the words $$$$ and &&&&&&&&& would contribute relevant seo to the site. In fact the word $$$$------ would also if a one letter spelling mistake is recognised at all by google, which i doubt but am unsure about. But as a brandname the $$$$------ word still works relevantly. Which do you think is a better choice to use? The short catchy name with the .info for relevance to information The .net which is more familiar than .info but slightly less relevant maybe. (But i think net as in network still works cos as i said it will be a social networking site). The long, .com domain which has more SEO plus a pun albeit on a spelling mistake. I know its kind of a subjective question and also hard to answer without knowing the name (which I've obfuscated because I'm only in initial design stage) but nevertheless im interested in what some of you guys think.

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• Offshoring: does it ever work?

  - by DanSingerman

  I know there has been a fair amount of discussion on here about outsourcing/offshoring, and the general opinion seems to be that at best it is difficult, and at worst it fails. I have direct experience of offshoring myself; a previous company where I was a dev manager wanted to send some development offshore, and we ran a pilot scheme to see how well it would work. Of course it was a complete failure, although it is not completely clear to me whether this was down to the offshore devs being less talented, the process, or other factors (no doubt it was really a combination). I can see as a business how offshoring looks attractive (much lower day rate), but as far as I can see, the only way it could possibly work is if you do exceptionally detailed design up front, with incredibly detailed specifications; and by the time you have invested in producing that, you have probably spent as nearly as much as if you had written the actual code locally (which I think is an instance of No Silver Bullet) So, what I want to know is, does anyone here have any experience of offshoring actually working ever? Especially if there are any success stories of it working in a semi-agile way? I know there are developers here from all over the World; has anyone worked on an offshore project they consider successful?

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• Are there any real-world cases for C++ without exceptions?

  - by Martin

  In When to use C over C++, and C++ over C? there is a statement wrt. to code size / C++ exceptions: Jerry answers (among other points): (...) it tends to be more difficult to produce truly tiny executables with C++. For really small systems, you're rarely writing a lot of code anyway, and the extra (...) to which I asked why that would be, to which Jerry responded: the main thing is that C++ includes exception handling, which (at least usually) adds some minimum to the executable size. Most compilers will let you disable exception handling, but when you do the result isn't quite C++ anymore. (...) which I do not really doubt on a technical real world level. Therefore I'm interested (purely out of curiosity) to hear from real world examples where a project chose C++ as a language and then chose to disable exceptions. (Not just merely "not use" exceptions in user code, but disable them in the compiler, so that you can't throw or catch exceptions.) Why does a project chose to do so (still using C++ and not C, but no exceptions) - what are/were the (technical) reasons? Addendum: For those wishing to elaborate on their answers, it would be nice to detail how the implications of no-exceptions are handled: STL collections (vector, ...) do not work properly (allocation failure cannot be reported) new can't throw Constructors cannot fail

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• Hello PCI Council, are you listening?

  - by David Dorf

  Mention "PCI" to any retailer and you'll instantly see them take a deep breath and start looking for the nearest exit.  Nobody wants to be insecure, but few actually believe that PCI does anything more than focus blame directly on retailers.  I applaud PCI for making retailers more aware of the importance of security, but did you have to make them PAINFULLY aware?  POS vendors aren't immune to this pain either as we have to undergo lengthy third-party audits in addition to the internal secure programming programs.  There's got to be a better way. There's a timely article over at StorefrontBacktalk that discusses the inequity of PCI's rules, and also mentions that the PCI Council is accepting comments until April 15th. As a vendor, my biggest issue with PCI is that they require vendors to disclose the details of any breaches, in effect "ratting out" customers.  I don't think its a vendor's place to do this.  I'd rather have the trust of my customers so we can jointly solve the problem. Mary Ann Davidson, Oracle's Chief Security Officer, has an interesting blog posting on this very topic.  Its a bit of a long read, but I found it very entertaining and thought-provoking.  Here's an excerpt: ...heading up the list of “you must be joking” regulations are recent disturbing developments in the Payment Card Industry (PCI) world. I’d like to give [the] PCI kahunas the benefit of the doubt about their intentions, except that efforts by Oracle among others to make them aware of “unfortunate side effects of your requirements” – which is as tactful I can be for reasons that I believe will become obvious below - have gone, to-date, unanswered and more importantly, unchanged. I encourage you to read the entire posting, Pain Comes Instantly, and then provide feedback to the PCI Council.

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• Joining a company to get experience vs. going alone [closed]

  - by daniels

  My goal is to build a successful web startup, say the next Digg or Twitter, and I am in doubt regarding what is the best route to follow as a programmer. I see basically two options: Get an internship/job with an established online company, so that I could get a mentor and learn from more experienced programmers, learn their processes, methodology and so on. I could do this for 1-2 years, and then quit to start working on my own stuff. Start working on my own projects right away, starting with small ones and moving up gradually. This would give me more control on the things I would be working with, but I would lack contact with more experienced people, so I would need to figure basic things on my own. Doing both is not an option in my opinion, cause I would need to put a lot of effort/time into each if I was to learn/improve as a programmer. So is one route definitely better than the other? Is there a third one I am not considering? Background: I already work by myself developing content-based websites and doing SEO, and I am decent at it so money is not a problem. Last year I started learning to program, first by myself and now I enrolled in a CS degree on a good university.

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• Dependencies not met on 12.04?

  - by Mochan

  Now I'm very aware that there are many questions out there that are quite similar to what I'm experiencing, but I have looked through many and I have not found a suitable answer. You are welcome to suggest questions that are similar, but I doubt that it will help. Getting on to the issue at hand, whenever I do anything that involves installation, whether it be codecs for videos, new programs or whatever the latter, I always get the 'Dependencies not met' error. In addition, I also get this notification in the panel: When clicked, the menu says this: "An error occurred. Please run Package Manager from the right-click menu or run apt-get in a terminal to see what is wrong. The error message was: ' Error: Broken Count 0'. This usually means your installed packages have unmet dependencies." It gives me three items to click: Show Updates Install all updates Check for Updates And then finally: Show Notifications (with a tick) Preferences When I try 'Install all Updates' (also Check Updates Install) it says this: and also this: As well as 'Ubuntu has experienced an internal error' and 'Did this error occur when moving from one version of Ubuntu to another?' (I clicked NO, because it didn't). So I took it's advice and ran sudo apt-get install -f This is what results: Reading package lists... Done Building dependency tree Reading state information... Done Correcting dependencies... Done The following extra packages will be installed: libapt-pkg4.12:i386 The following packages will be upgraded: libapt-pkg4.12:i386 1 upgraded, 0 newly installed, 0 to remove and 87 not upgraded. 1 not fully installed or removed. Need to get 0 B/941 kB of archives. After this operation, 0 B of additional disk space will be used. Do you want to continue [Y/n]? Y E: Internal Error, No file name for libapt-pkg4.12 When running sudo apt-get update it's all fine, but running sudo apt-get install -f still results in the same thing. I really have no idea what to do... can anyone help me?

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• Why does working processors harder use more electrical power?

  - by GazTheDestroyer

  Back in the mists of time when I started coding, at least as far as I'm aware, processors all used a fixed amount of power. There was no such thing as a processor being "idle". These days there are all sorts of technologies for reducing power usage when the processor is not very busy, mostly by dynamically reducing the clock rate. My question is why does running at a lower clock rate use less power? My mental picture of a processor is of a reference voltage (say 5V) representing a binary 1, and 0V representing 0. Therefore I tend to think of of a constant 5V being applied across the entire chip, with the various logic gates disconnecting this voltage when "off", meaning a constant amount of power is being used. The rate at which these gates are turned on and off seems to have no relation to the power used. I have no doubt this is a hopelessly naive picture, but I am no electrical engineer. Can someone explain what's really going on with frequency scaling, and how it saves power. Are there any other ways that a processor uses more or less power depending on state? eg Does it use more power if more gates are open? How are mobile / low power processors different from their desktop cousins? Are they just simpler (less transistors?), or is there some other fundamental design difference?

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• Gaming Community CMS, with forum integration [closed]

  - by Tillman32

  Possible Duplicate: Which Content Management System (CMS) should I use? I've had a simple website that I coded myself for a while now, the site is a gaming community. It's very forum and news driven. It was a HORRIBLE idea to take on coding this thing myself. Although we've used it for about a year now, we're just getting too big, and I need to streamline our work. I need writers to post news, etc. I've been doing it through code. ( A year ago I thought it would be a cool idea ) Anyway, I've been messing with just about every CMS out there, and I'm struggling to get something that I really like. The main issue I'm facing, is a good news system, and good forum integration. I'm sort of picky when it comes to looks, its a curse. Reading on here, I see a lot of people saying Drupal is the best for the 3 things I need, community interaction, and forums. I think the main issue that I ran into with drupal, was ease of use, and themes. I am not a web designer, and I need a good theme. For an idea of what I'm looking for, go check out http://www.clgaming.net, they have forums integrated, a nice news area on home page/news section, and nice user accounts. It looks very professional, and I doubt I'll get close to that with a free theme, but their functionality is exactly what I need. Any ideas would be greatly appreciated.

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• Effect of using dedicated NVidia card instead of Intel HD4000

  - by Sman789

  Short version: Can someone please advise me of the effect of adding a dedicated NVIDIA GeForce GT 630M card to an Ubuntu laptop in terms of power consumption and performance gains/losses when doing general productivity tasks and booting up. Also, how good are the closed source, open source, and Bumblebee drivers for these newer cards compared to support for the Intel HD4000? Long version/Background, if any info here is helpful: I'm thinking of ordering a laptop from PC Specialist (a UK company who actually sell machines without Windows pre-installed) with the following specifications: Genesis IV: 15.6" AUO Matte 95% Gamut LED Widescreen (1920x1080) Intel® Core™i5 Dual Core Mobile Processor i5-3210M (2.50GHz) 3MB 4GB SAMSUNG 1600MHz SODIMM DDR3 MEMORY (1 x 4GB) 120GB INTEL® 520 SERIES SSD, SATA 6 Gb/s (upto 550MB/sR | 520MB/sW) Intel 2 Channel High Definition Audio + MIC/Headphone Jack GIGABIT LAN & WIRELESS INTEL® N135 802.11N (150Mbps) + BLUETOOTH Now, as I want this laptop mainly for work and not for games, I would be more than content with the HD4000 integrated chip which comes with the processor. However, for compatibility reasons, I am not able to get the specs I want unless I choose a NVIDIA GeForce GT 630M 1GB graphics card, which I don't have a great deal of use for. I'm willing to buy it, however, as it's still cheaper than any other laptop with the specs I want. However, I know that Linux power management isn't fantastic with open-source graphics drivers, and I don't much about Bumblebee. Basically, whilst I'm happy to 'tolerate' the card being there, I don't want to experience any negative effects on the rest of my system (battery, performance etc) and if there are likely to be any, I might reconsider my purchase. So if anyone can advise me on the effects, I would be very grateful, since I doubt I can just turn the card off. Thankyou for any assistance :)

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• Mix10 is in history, Windows Phone 7 is here!

  MIX10was really a fantastic conference for Telerik! We had great talks, many customers stopped by our booth and we've got a lot of great feedback for our Silverlight Controls. Thank you for stopping by and sharing your opinion! So now, that the MIX is over, there is one question left: What Telerik will develop for theWindows Phone 7? We had this question on the booth over and over again and it is no doubt that the WP7 development is a hot topic now. All we can sayat this momentis that Yes, we are looking into this and we actually have some of our controls already partially working with WP7 internally :) You know that the Silverlight version for WP7 is Silverlight 3 and it has some very good additions over it in order to support the phone hardware - like webcam, mic, accelerometer, etc. If you missed the conference and the sessions- here is a list of videos thatwill get you started: Building Windows Phone Applications with Silverlight, Part 1 Mike Harsh Building Windows Phone Applications with Silverlight, Part 2 Peter Torr The good thing isthat our controls will needvery few tweaks in order to be *compiled* against the WP7 Silverlight runtime. But, the more interesting part is actually what are the scenarios that our controls will be used in. How different they will be from the desktop version of the SL? This is where we need your feedback - drop as a line and let us know what are your expectations in this area. Do you need something specific, a feature or a new control that you like to use, or maybe you have a specific scenario that you want to share. Nowthe ball is in your hands - write on the forums, send us a ticket, or just leave your comment on WP7 developmentbelow! 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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• Genetic Algorithm new generation exponentially increasing

  - by Rdz

  I'm programming Genetic Algorithm in C++ and after searching all kind of ways of doing GA'a operators (selection, crossover, mutation) I came up with a doubt. Let's say I have an initial population of 500. My selection will consist in getting the top 20% of 500(based on best fitness). So I get 100 individuals to mate. When I do the crossover I'll get 2 children where both together have 50% of surviving. So far so good. I start the mutation, and everything's ok.. Now when I start choosing the Next generation, I see that I have a big number of children (in this case, 4950 if you wanna know). Now the thing is, every time I run GA, if I send all the children to the next generation, the number of individuals per generation will increase exponentially. So there must be a way of choosing the children to fulfill a new generation without getting out of this range of the initial population. What I'm asking here is if there is anyway of choosing the children to fill the new generations OR should I choose somehow (and maybe reduce) the parents to mate so I don't get so many children in the end. Thanks :)

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