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  • Can't boot Ubuntu 12.10 32 or 64 Bit, only Ubuntu 12.04 32 Bit [closed]

    - by Alexander
    Possible Duplicate: My computer boots to a black screen, what options do I have to fix it? i tried to install Ubuntu 12.04 64Bit, 12.10 32 and 64Bit, but it doesn't work. I'm used the Ubuntu 12.04 32Bit Start Disc Creator and also Unetboot on Win7, the installation-process are finished and i restart without the Stick. I can choose for example 12.10 and it starts writing "start ... [OK], ...", but then it hangs most on "Stop Kernel Messages [OK]". Then i can only shutdown normal the system and it writes stopping, shutdown and something like that. I am use an Aspire One D270 Netbook with Intel Atom N2600. It also doesn't work to try Ubuntu 12.10 from running on USB Stick. It starts, but then its black and the cursor blink on the left upside. Please can you help me? :(

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  • How to use UILongPressGestureRecognizer with sprite drag & wait?

    - by ganesh
    May be it's asked before also but I couldn't find any good answer. Please tell me how this can be implemented with UILongPressGestureRecognizer? A user drags a sprite from X location to Y location. Then it waits at Y location (touch is not ended yet) for 1 or 2 secs and release the touch i.e touch is ended. In this case, shouldn't following states be triggered in below order for UILongPressGestureRecognizer: UIGestureRecognizerStateBegan UIGestureRecognizerStateChanged UIGestureRecognizerStateEnded ? My problem is if UIPanGestureRecognizer is also implemented to handle drags, UILongPressGesture is never triggered even after Long waits. Any thoughts?

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  • Best way to store a large amount of game objects and update the ones onscreen

    - by user3002473
    Good afternoon guys! I'm a young beginner game developer working on my first large scale game project and I've run into a situation where I'm not quite sure what the best solution may be (if there is a lone solution). The question may be vague (if anyone can think of a better title after having read the question, please edit it) or broad but I'm not quite sure what to do and I thought it would help just to discuss the problem with people more educated in the field. Before we get started, here are some of the questions I've looked at for help in the past: Best way to keep track of game objects Elegant way to simulate large amounts of entities within a game world What is the most efficient container to store dynamic game objects in? I've also read articles about different data structures commonly used in games to store game objects such as this one about slot maps, but none of them are really what I'm looking for. Also, if it helps at all I'm using Python 3 to design the game. It has to be Python 3, if I could I would use C++ or Unityscript or something else, but I'm restricted to having to use Python 3. My game will be a form of side scroller shooter game. In said game the player will traverse large rooms with large amounts of enemies and other game objects to update (think some of the larger areas in Cave Story or Iji). The player obviously can't see the entire room all at once, so there is a viewport that follows the player around and renders only a selection of the room and the game objects that it contains. This is not a foreign concept. The part that's getting me confused has to do with how certain game objects are updated. Some of them are to be updated constantly, regardless of whether or not they can be seen. Other objects however are only to be updated when they are onscreen (for example, an enemy would only be updated to react to the player when it is onscreen or when it is in a certain range of the screen). Another problem is that game objects have to be easily referable by other game objects; something that happens in the player's update() method may affect another object in the world. Collision detection in games is always a serious problem. I need a way of containing the game objects such that it minimizes the number of cases when testing for collisions against one another. The final problem is that of creating and destroying game objects. I think this problem is pretty self explanatory. To store the game objects then I've considered a number of different methods. The original method I had was to simply store all the objects in a hash table by an id. This method was simple, and decently fast as it allows all the objects to be looked up in O(1) complexity, and also allows them to be deleted fairly easily. Hash collisions would not be a major problem; I wasn't originally planning on using computer generated ids to store the game objects I was going to rely on them all using ids given to them by the game designer (such names would be strings like 'Player' or 'EnemyWeapon4'), and even if I did use computer generated ids, if I used a decent hashing algorithm then the chances of collisions would be around 1 in 4 billion. The problem with using a hash table however is that it is inefficient in checking to see what objects are in range of the viewport. Considering the fact that certain game objects move (as well as the viewport itself), the only solution I could think of in order to only update objects that are in the viewport would be to iterate through every object in the hash table and check if it is in the viewport or not, updating only the ones that are in the valid area. This would be incredibly slow in scenarios where the amount of game objects exceeds 500, or even 200. The second solution was to store everything in a 2-d list. The world is partitioned up into cells (a tilemap essentially), where each cell or tile is the same size and is square. Each cell would contain a list of the game objects that are currently occupying it (each game object would be inserted into a cell depending on the center of the object's collision mask). A 2-d list would allow me to take the top-left and bottom-right corners of the viewport and easily grab a rectangular area of the grid containing only the cells containing entities that are in valid range to be updated. This method also solves the problem of collision detection; when I take an entity I can find the cell that it is currently in, then check only against entities in it's cell and the 8 cells around it. One problem with this system however is that it prohibits easy lookup of game objects. One solution I had would be to simultaneously keep a hash table that would contain all the positions of the objects in the 2-d list indexed by the id of said object. The major problem with a 2-d list is that it would need to be rebuilt every single game frame (along with the hash table of object positions), which may be a serious detriment to game speed. Both systems have ups and downs and seem to solve some of each other's problems, however using them both together doesn't seem like the best solution either. If anyone has any thoughts, ideas, suggestions, comments, opinions or solutions on new data structures or better implementations of the existing data structures I have in mind, please post, any and all criticism and help is welcome. Thanks in advance! EDIT: Please don't close the question because it has a bad title, I'm just bad with names!

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  • How do I run a 64-bit guest in VirtualBox?

    - by ændrük
    I would like to have an Ubuntu 11.04 64-bit test environment. When I try booting the Ubuntu 11.04 64-bit installation CD in VirtualBox, the following message is displayed by VirtualBox: VT-x/AMD-V hardware acceleration has been enabled, but is not operational. Your 64-bit guest will fail to detect a 64-bit CPU and will not be able to boot. Please ensure that you have enabled VT-x/AMD-V properly in the BIOS of your host computer. What am I doing wrong? Details: VBox.log, ubuntu-test.vbox, and /proc/cpuinfo. Kernel: Linux aux 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:24 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux The Virtualization setting in the BIOS is set to Enabled.

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  • Compiz antialiasing with xserver-xorg-video-radeon?

    - by eXtractor
    Windows previews are ugly on my computer. Is there any solution to make them smooth? BTW windows previews in Metacity with compositing enabled (/apps/metacity/general/compositing_manager) are looking much better than in Compiz. I am using the open source radeon driver, so I can't configure my videocard preferences via AMD's GUI, and I've tried all options like a texture filter, bicubic filter or mipmapping I found in ccsm with no result. How to make windows previews in Compiz be as smooth as they are in Metacity? And sorry, my English sucks just like these windows thumbnails in Compiz.

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  • What should my "code sample" look like?

    - by thesunneversets
    I've just had quite a good phone interview (for a CakePHP-related position, not that it's especially important to the question). The interviewer seemed to be impressed with my resume and personality. At the end, though, he asked me to email him a code sample from my existing work project, "to check you're not secretly a terrible programmer, ha ha!" I'm not too worried that my code can't stand on its own two feet, but I'm very much an intermediate programmer rather than an expert. What obvious pitfalls should I make sure my code sample doesn't fall into, in case they rule me out on the spot? Secondly, and this is probably the harder part of the question to answer, what features in a code sample would be so impressive that they would instantly make you much more favourably inclined towards the programmer? All ideas or suggestions welcomed!

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  • error of pdf2djvu: "Bogus memory allocation size"

    - by Tim
    I am using pdf2djvu to convert a pdf file into a djvu file, but got this error while trying to convert to either bundled or indirect multi-page djvu file: $ pdf2djvu 1.pdf -o 1.djvu 1.pdf: - page #1 -> #1 Bogus memory allocation size $ pdf2djvu 1.pdf -i 1.djvu 1.pdf: - page #1 -> #1 Bogus memory allocation size I was wondering what is wrong here and how I shall fix the problem? You can suggest another application other than pdf2djvu. My pdf file can be downloaded from here , in case that you may wonder what is special about it. Thanks and regards!

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  • Volume indicator issue after xubuntu 13.10 upgrade

    - by misterjinx
    Last night I decided to upgrade my system to the latest version of Xubuntu, 13.10. The process went fine, but now I'm facing this strange issue. There is no sound settings available in the settings manager window and the volume indicator looks like when the volume is muted, clicking the indicator being broken as well. The indicator looks like this: I tried to do a alsa force-reload followed by a restart of the computer, but didn't help. Any thoughts ? l.e. After some digging I found out that the volume control exists, so this must be a volume indicator issue.

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  • Flattening a Jagged Array with LINQ

    - by PSteele
    Today I had to flatten a jagged array.  In my case, it was a string[][] and I needed to make sure every single string contained in that jagged array was set to something (non-null and non-empty).  LINQ made the flattening very easy.  In fact, I ended up making a generic version that I could use to flatten any type of jagged array (assuming it's a T[][]): private static IEnumerable<T> Flatten<T>(IEnumerable<T[]> data) { return from r in data from c in r select c; } Then, checking to make sure the data was valid, was easy: var flattened = Flatten(data); bool isValid = !flattened.Any(s => String.IsNullOrEmpty(s)); You could even use method grouping and reduce the validation to: bool isValid = !flattened.Any(String.IsNullOrEmpty); Technorati Tags: .NET,LINQ,Jagged Array

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  • Recover files from NTFS drive with bad sectors

    - by Martin
    A few nights ago I have created a backup of my data on an external 500 GB NTFS USB hard drive. I have then formatted my computer, reinstalled Ubuntu and started transferring back the data from the external HDD. Unfortunately some files have became corrupted and Ubuntu is unable to copy them over. The same issue happens if I login using Windows 7. Disk Utility detects with SMART that there are "a few bad sectors". Some of files are perfectly intact, but other files cannot be accessed (nor read, copied...) although they are displayed within nautilus and show the correct file size. Is there anything I can do to recover this data? I have thought of using TestDisk but this utility seems more useful for repairing lost partitions or deleted files. I have also thought of using ddrescue so I could at least have a low level copy of the disk but I am not sure what use to make of it in order to recover the data!!!

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  • How to install Perl Switch.pm module required to build WebKit-GTK?

    - by Sameer Naik
    I noticed that the perl version (5.14) shipped with 12.10 does not include the Switch.pm module needed while building WebKiT-GTK. Looking around on the internet I found few suggestions indicating that I should install something call p5-switch from ports. I have looked around and was not able to get this done. I am not a perl guy and have no idea where i can get this package. Can someone please help me as to Where to download the package for ubuntu 12.10 In case it is not a .deb, How do i install it.

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  • Can somebody guide me asto how I can make a game for playing cards [closed]

    - by user2558
    In college me and my friends use to play cards all the time. I want to make a game for that. It's quite similar to hearts, a kind of modified hearts which we made up. I want to make a multiplayer game which could be played over the internet. Plus there should also be an option for computer to play if less players availiable at the time. I don't want to make a exe. I want to play in browser. How should I go about it.

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  • HTG Explains: Why Do Hard Drives Show the Wrong Capacity in Windows?

    - by Chris Hoffman
    If you’ve ever purchased a computer with a hard disk capacity of 500 GB and opened Windows Explorer only to find that its capacity looked more like 440 GB, you may be wondering where all those gigabytes went. There are several reasons Windows could display the wrong amount of available space, from invisible shadow files, formatting overhead, and hidden recovery partitions to misleading (though technically accurate) storage capacities advertised by hard drive manufacturers. Image Credit: Norlando Pobre HTG Explains: Why Do Hard Drives Show the Wrong Capacity in Windows? Java is Insecure and Awful, It’s Time to Disable It, and Here’s How What Are the Windows A: and B: Drives Used For?

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  • How to use Mercurial's LargeFiles extension? [migrated]

    - by DuncanBoehle
    I use Mercurial for game development, and I'm trying to use the LargeFiles extension included in Mercurial 2.0 to keep track of large binary assets. Unfortunately there isn't a whole lot of documentation on the extension, so I'm not sure how people are expected to use it. For example, is there any way to safely clean out the .hg/largefiles directory? If I'm on the tip revision, and expect to always have internet access, then I don't need the old versions of largefiles cluttering up the repository, since that's the whole point of using the LargeFiles extension. Also, how do I have more fine-grained control over where the largefile store is? I can only assume that it's created somewhere on the computer that ran hg init, but I have no idea about the details. Thanks!

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  • Right click menu stopped working in firefox

    - by umpirsky
    Right click menu stopped working in firefox as well as address bar auto completion. I have tried removing and installing firefox again from software center, but the problem persist. UPDATE: Hehum, strange. I wanted to restart in safe mode, clicked help menu, and noticed that menu is ubuntu software center menu! Then cllosed software center, and menu was gone. So now right click is working, auto complete is working, but there is no main menu! Probably unity global menu integration problem. Also, there is no firefox in launcher nor alt+tab any more. Any idea? UPDATE: For some reason, it works after computer restart :o

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  • I can't figure out how to run ubuntu .iso from thumbdrive?

    - by Judge Cole Stanley
    I downloaded Ubuntu 12.04.1 and I can't find a solid way to run it from the disk version of Ubuntu 11.04 for a clean install. I think the hard drive is messed up, or else I would install 11.04, but it won't work. So I wanna install 12.04.1 from a thumbdrive, so I can actually use this computer without using the demo and installing everything when it dies, or shuts off... Please help? I want to make it at least bootable from a thumbdrive, just so I can lightly browse the internet and what not... it doesn't have to be a hard install.

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  • Better drivers for SiS 650/740 integrated video?

    - by Bart van Heukelom
    I installed Xubuntu 10.10 on an old box today and the graphical performance is horrid. According to lspci, the video card is this: 01:00.0 VGA compatible controller: Silicon Integrated Systems [SiS] 65x/M650/740 PCI/AGP VGA Display Adapter (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. Device 8081 Flags: 66MHz, medium devsel, IRQ 11 BIST result: 00 Memory at f0000000 (32-bit, prefetchable) [size=128M] Memory at e7800000 (32-bit, non-prefetchable) [size=128K] I/O ports at d800 [size=128] Expansion ROM at <unassigned> [disabled] Capabilities: <access denied> Kernel modules: sisfb Is there a way to make it faster? Alternative drivers? The additional drivers tool shows nothing. I'm specifically interested in improving Java's Java2D rendering speed, because I'll be running a "stat screen" written in that language on it.

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  • How do I restrict my kids' computing time?

    - by Takkat
    Access to our computer (not only to the internet) needs to be restricted for the accounts of my kids (7, 8) until they are old enough to manage this by themselves. Until then we need to be able to define the following: the hours of the day when computing is o.k. (e.g. 5 - 9 pm) the days of the week when computing is not o.k. (e.g. mondays to fridays) the amount of time allowed per day (e.g. 2 hours) In 11.10 all of the following that used to do the job don't work any more: Timekpr: for 11.10 not available through the ppa. The installed version from 11.04 does not work in 11.10. Timoutd: command line alternative, but in 11.10 removed from the repositories. Gnome Nanny: Looks great but repeatedly crashes to force restarting X-server. So we can't use or recommed this program at the moment. Are there any other alternatives?

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  • Triple monitor setup with an ATI Radeon 4200?

    - by Ben Clapp
    I have a relatively new Powerspec computer (i5 quad core processor, about a year or two old) and just grabbed a new relatively inexpensive ($40?) graphics card. It has 1 DVI, one VGA, and one HDMI output. I have two (different type) monitors plugged into the DVI and VGA slots, and they work great. However, I cannot seem to be able to get a third monitor in the HDMI slot to work. I can see the monitor (and monitor info) show up in display settings. However, if I try to switch the monitor to 'on' and click apply, nothing happens. Anyone have the slightest idea what the problem might be? (It's a Radeon graphics card FYI; if I remember right I think it was the Radeon 4200?)

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  • No dual boot option, no boot priority order

    - by Atul
    I installed Ubuntu yesterday. I partitioned my C: when it was asked to give memory allocation to Ubuntu. The version is 12.04. I was able to install Ubuntu completely: Ubuntu is successfully installed. Restart you computer. I restarted and there was no Ubuntu option. Windows 7 also asked for a boot repair. So I did that too. I then wanted to change my boot priority order to Ubuntu but couldn't find it in BIOS section. I allotted 20GB to Ubuntu and it is deducted from C: but I couldn't see the partitioned drive in Windows 7. Wubi was working fine before on PC with dual boot option. I used Linux Live key creator to boot my PC through pen drive.

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  • Dell N7110 i7 overheats and doesn't boot when anything is plugged into the USB3 port

    - by Kostyantyn
    When i plug in any devices (mouse, keyboard) into usb 3.0 system dell n7110 overheats and fan goes crazy with terrible noise. So i'm using 1 usb 2.0 slot now with a usb hub. It doesn't solve the problem completely but system stays at a low fan rate for a longer time. I've tried to lower CPU frequency, but in my case (DELL INSPIRON N7110 i7 on Linux 3.0.0-14-generic #23-Ubuntu SMP Mon Nov 21 20:28:43 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux) CPU was pretty cool (51 C) and still the same horrible fan noise. Looks like there is no such problems with ubuntu 10.04 (but there're some other problems). Ubuntu even doesn't boot if anything is plugged into usb 3.0

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  • Grub boot problems with older ubuntu

    - by denk doink
    This is my 1st post here and there are 2 problems that are inter-related. I'm not much of a Linux system person... the computer is a dedicated linux box without any windoze. 1) running 9.10 and had a boot failure last week. looks like a file was deleted or corrupted. i was unable to get it to work. realizing it was a boot issue, i took the CD and installed 9.04 to co-exist with 9.10 on the disc. 9.04 was put into a 2.5 gb ext3 partition. i was able to boot into 9.10 from grub menu selection. 9.04 was now the default in grub menu. 2) i want to remove/delete/purge 9.04 completely from my system and "clean up" the stuff so that the machine boots straight to 9.10 (no grub menu). how are these accomplished in a "safe" manner? thank you. -denk

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  • Languages/Methods to Learn for Scientific Computing?:

    - by Zéychin
    I'm a second-semester Junior working towards a Computer Science degree with a Scientific Computing concentration and a Mathematics degree with a concentration on Applied Discrete Mathematics. So, number crunching and such rather than a bunch of regular expressions, interface design, and networking. I've found that I'm not learning new relevant languages from my coursework and am interested in what the community would recommend me to learn. I know as far as programming methods go, I need to learn more about parallelizing programs, but if there's anything else you can recommend, I would appreciate it. Here's a list of the languages with which I am very experienced (web technologies omitted as they barely apply here). Any recommendations for additional languages I should learn would be very much appreciated!: Java C C++ Fortran77/90/95 Haskell Python MATLAB

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  • How can I switch between fglrx and ati drivers?

    - by Santa Maradona
    Hi there, How can I switch between fglrx and ati (open source) drivers without uninstalling fglrx? The thing is I'm using FGLRX on a daily basis, because it's better for movies--OS driver displays annoying horizontal line while playing movies. FGLRX also does this, but it's less visible. That's only disadvantage of OS driver. When I want to plug in external monitor with different resolution than my laptop's LCD I have to use open source driver, because FGLRX can't display two different resolutions at the same time. I can uninstall FGLRX, but it's rather inconvenient to do this all the time. I've noticed that when I'm using FGLRX there is xorg.conf file and when I uninstall it, then the file is missing. So my question is how to switch between them? It'll be perfect if I could do this without restarting my computer either. I'm using Ubuntu 10.10, laptop/netbook MSI U250.

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  • Some mail details about Orange Mauritius

    Being an internet service provider is not easy after all for a lot of companies. Luckily, there are quite some good international operators in this world. For example Orange Mauritius aka Mauritius Telecom aka Wanadoo(?) aka MyT here in Mauritius. The local circumstances give them a quasi-monopol position on fixed lines for telephony and therefore cable-based DSL internet connectivity. So far, not bad but as usual... the details. Just for the records, I am only using the services of Orange for mobile but friends and customers are bound, eh stuck, with other services of Orange Mauritius. And usually, being the IT guy, they get in touch with me to complain about problems or to ask questions on either their ADSL / MyT connection, mail services or whatever. Most of those issues are user-related and easily to solve by tweaking the configuration of their computer a little bit but sometimes it's getting weird. Using Orange ADSL... somewhere else Now, let's imagine we are an Orange ADSL customer for ages and we are using their mail services with our very own mail address like "[email protected]". We configured our mail client like Thunderbird, Outlook Express, Outlook or Windows Mail as publicly described, and we are able to receive and send emails like a champion. No problems at all, the world is green. Did I mention that we have a laptop? Ok, let's take our movable piece of information technology and visit a friend here on the island. Not surprising, he is also customer of Orange, so we can read and answer emails. But Orange is not the online internet service provider and one day, we happen to hang out with someone that uses Emtel via WiMAX or UMTS.. And the fun starts... We can still receive and read emails from our Orange mail account and the IT world is still bright but try to send mails to someone outside the domain "@intnet.mu" or "@orange.mu". Your mail client will deny sending mail with SMTP message 5.1.0 "blah not allowed". First guess, there is problem with the mail client, maybe magically the configuration changed over-night. But no it is still working at home... So, there is for sure a problem with the guy's internet connection. At least, it is his fault not to have Orange internet services, so it can not work properly... The Orange Mail FAQ After some more frustation we finally checkout the Orange Mail FAQ to see whether this (obviously?) common problem has been described already. Sorry, but those FAQ entries are even more confusing as it is not really clear how to handle this scenario. Best of all is that most of the entries are still refering to use servers of the domain "intnet.mu". I mean Orange will disable those systems in favour of the domain "orange.mu" in the near future and does not amend their FAQs. Come on, guys! Ok, settings for POP3 are there. Hm, what about the secure version POP3S? No signs at all... Even changing your mail client to use password encryption with STARTTLS is not allowed at all. Use "bow.intnet.mu" for incoming mail... Ahhh, pretty obvious host name. I mean, at least something like pop.intnet.mu or pop3.intnet.mu would have been more accurate. Funny of all, the hostname "pop.orange.mu" is accessible to receive your mail account. Alright, checking SMTP options for authentication or other like POP-before-SMTP or whatever well-known and established mechanism to send emails are described. I guess that spotting a whale or shark in Mauritian waters would be easier. Trial and error on SMTP settings reveal that neither STARTTLS or any other connection / password encryption is available. Using SSL/TLS on SMTP only reveals that there is no service answering your request. Calling customer service So, we have to bite into the bitter apple and get in touch with Orange customer service and complain/explain them our case and ask for advice. After some hiccups, we finally manage to get hold of someone competent in mail services and we receive the golden spoon of mail configuration made by Orange Mauritius: SMTP hostname: smtpauth.intnet.mu And the world of IT is surprisingly green again. Customer satisfaction? Dear Orange Mauritius, what's the problem with this information? Are you scared of mail spammer? Why isn't there any case in your FAQs? Ok, talking about your FAQs - simply said: they are badly outdated! Configure your mail client to use server name based in the domain intnet.mu but specify your account username with orange.mu as domain part. Although, that there are servers available on the domain orange.mu after all. So, why don't you provide current information like this: POP3 server name: pop.orange.muSMTP server name: smtp.orange.muSMTP authenticated: smtpauth.orange.mu It's not difficult, is it? In my humble opinion not really and you would provide clean, consistent and up-to-date information for your customers. This would produce less frustation and so less traffic on your customer service lines. Which after all, would improve the total user experience and satisfaction level on both sides. Without knowing these facts. Now, imagine you would take your laptop abroad and have to use other internet service providers to be able to be online... Calling your customer service would be unnecessary expensive!

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