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  • Need new developers-laptop, with ubuntu. Multiple ext displays, ssd, dock, NO DVD [closed]

    - by Ole Morten Amundsen
    I'm having a really hard time finding a great alternative for Macbook Pro (I have a MB pro '08). I'd like to return to ubuntu and need a kick-ass laptop. If you help, you've lead me back to linux :) Req: ubuntu friendly lots of memory 8G+ ssd 160GB+ great processor (intel sandy?) connect up to three external displays. this triple display looks cool No optical drive, NO DVD 13-17" dock. In place of the ridiculous optical drive (It's like having a floppy drive IMO): extra battery? 2nd ssd? extra graphics card? your suggestion The laptop should be designed for not having dvd. I can't find many, unless they are tiny 11"... I'm exited to know your answers!

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  • Scrambled screen on 12.04 with Radeon HD 7670M/2GB when scrolling the page

    - by Mihkel
    I have Ubuntu 12.04 LTS 64 bit and I have installed proprietary drivers for my Radeon HD 7670M with 2GB memory. But if I scroll page or do anything like move a window then I get blurred screen (more like scrambled maybe) for a second and if I try to take PrtScr of it, it is goes to normal. I have tried other drivers and it does not solve my problem. And I do not want to go over 32 bit Ubuntu because I have 6 GB ram and I would lose so much of it. Also if it helps, my processor is Intel® Core™ i5-3210M CPU @ 2.50GHz × 4.

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  • Bare-metal mode for Ubuntu

    - by user1071136
    I'm interested to benchmark a console-mode application, and would like to reduce to a minimum any interferences from other processes in the system. Is there an easy way to boot into Ubuntu 12.04 in a "bare-metal" mode ? I'm still interested in casually booting a "desktop" version of Ubuntu (so will prefer to avoid permanent changes), and would like to avoid installing a separate Ubuntu-server version. My use-case is the following - Application is single-thread and console-mode only. Test-box has 12GB of memory. I ssh into the test-box. Seems I can skip at least Unity, X-server and their dependents.

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  • Humble Bundle Gives You DRM-Free Games at Pay-What-You-Want Prices

    - by Jason Fitzpatrick
    The Humble Bundle is back–score cross-platform games at a pay-what-you-want price and even send the proceeds to charity in the process. Between now and April 2nd, score great independent games like Zen Bound 2 and Avadaon: The Black Fortress with a name-your-price deal courtesy of The Humble Bundle. You pay what you want and specify how you want the money divided among the developers and the Electronic Frontier Foundation/Child’s Play charities. Check out the video above to see the games included in the bundle. All games are cross-platform, available for Windows, Mac, Linux, and Android, and DRM-Free. The Humble Bundle The HTG Guide to Hiding Your Data in a TrueCrypt Hidden Volume Make Your Own Windows 8 Start Button with Zero Memory Usage Reader Request: How To Repair Blurry Photos

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  • ssrs: the report execution has expired or cannot be found

    - by Alex Bransky
    Today I got an exception in a report using SQL Server Reporting Services 2008 R2, but only when attempting to go to the last page of a large report: The report execution sgjahs45wg5vkmi05lq4zaee has expired or cannot be found.;Digging into the logs I found this:library!ReportServer_0-47!149c!12/06/2012-12:37:58:: e ERROR: Throwing Microsoft.ReportingServices.Diagnostics.Utilities.ReportServerStorageException: , An error occurred within the report server database.  This may be due to a connection failure, timeout or low disk condition within the database.;I knew it wasn't a network problem or timeout because I could repeat the problem at will.  I checked the disk space and that seemed fine as well.  The real issue was a lack of memory on the database server that had the ReportServer database.  Restarting the SQL Server engine freed up plenty of RAM and the problem immediately went away.

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  • Computer Science Fundamentals - Recommended books

    - by contactmatt
    Hey, I'm looking to see if anyone can recommend any books in fundamentals of computer science. I obtained my associates degree as a programmer/analyst a couple years ago and I know a good amount about programming on the .NET framework. I'm even certified on the .NET 4 framework as a web application developer. However, since I was only able to obtain my associates degree, I was deprived at my college on the low-level basics and operations of computers and basic computer science information. I'm really interesting in learning about the low-level operations of a computer and in programming (bytes, bits, memory management, etc.) Can anyone recommend any good computer science books for someone who is decently experienced in programming? Thank You

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  • How do you navigate and refactor code written in a dynamic language?

    - by Philippe Beaudoin
    I love that writing Python, Ruby or Javascript requires so little boilerplate. I love simple functional constructs. I love the clean and simple syntax. However, there are three things I'm really bad at when developing a large software in a dynamic language: Navigating the code Identifying the interfaces of the objects I'm using Refactoring efficiently I have been trying simple editors (i.e. Vim) as well as IDE (Eclipse + PyDev) but in both cases I feel like I have to commit a lot more to memory and/or to constantly "grep" and read through the code to identify the interfaces. As for refactoring, for example changing method names, it becomes hugely dependent on the quality of my unit tests. And if I try to isolate my unit tests by "cutting them off" the rest of the application, then there is no guarantee that my stub's interface stays up to date with the object I'm stubbing. I'm sure there are workarounds for these problems. How do you work efficiently in Python, Ruby or Javascript?

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  • Virtual Newsstand Displays Comic Books by Date

    - by Jason Fitzpatrick
    If you’re a comic book aficionado (or just want to take a stroll down memory lane), this virtual newsstand shows you all the comics published for any month and year going all the way back to the 1930s. Courtesy of Mike’s Amazing World of Comics, the virtual newsstand lets you dial in a month, year, sorting style, and shows all publishers or select publishers. The covers are displayed in a grid where you can click through to see a larger version of the cover and read additional information about the comic. It’s a really neat way to check out trends in comic design and artwork over the years. Hit up the link below to take it for the spin. Have a cool comic book resource to share? Sound off in the comments. The Newsstand [via Boing Boing] Why Enabling “Do Not Track” Doesn’t Stop You From Being Tracked HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference

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  • Help slecting dedicated server with good disk I/O & network

    - by JP19
    Hi, I am looking for a cheap dedicated server. (I was earlier happy with VPS, untill I realized that the disk I/O is not at all reliable and depends on what your neighbours are upto at the moment). I was browsing through http://www.lowenddedi.net/the-database I don't understand memory speed and NIC speed columns at all. What will be their affect? Do I need to worry about them? Also, can someone help suggest a provider, with following criteria: 1) Good & reliable Network 2) Price <= $60/month. Thanks JP

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  • Problem with dash - there are no programs on the list

    - by sky
    As I said. There are no programs on the dash list (seacher on appmenu). Yesterday I logged into my account and I tried to find some program but there wasn't any! Additionaly, I tried to view installed programs and manually find program which I looked for, but nothing was displayed :( And today, when I want to turn on Ubuntu Software Center, it just don't turn on .< I'm using Ubuntu 11.10 (64bit). I installed "fresh" O.S. few days ago. Ubuntu is updated and has many Gigabytes of disk memory available. Please help me and my unfortunate O.S. Thank you for all answers.

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  • How To Properly Scan a Photograph (And Get An Even Better Image)

    - by Eric Z Goodnight
    Somewhere in your home, there’s a box of old analog photographs you probably want digital copies of. Unless you know how to use your scanner correctly, the image quality can turn out poor. Here’s how to get the best results. If your memories are important to you, then it’s worth taking the time to do them right. Today we’re going to look at the largely overlooked tools and methods that’ll give you the best possible quality out of a scan of a less than perfect photo. We’ll see how to make the most of the scanning software and how to use graphics programs to make the image look better than the original photograph. Keep reading! How To Properly Scan a Photograph (And Get An Even Better Image) The HTG Guide to Hiding Your Data in a TrueCrypt Hidden Volume Make Your Own Windows 8 Start Button with Zero Memory Usage

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  • When attempting to install ubuntu 12.04 from CD, I am stuck on black streen with "loading bootlogo..."

    - by Jessica K
    I downloaded Ubuntu 12.04 to my desktop and burned to a CD using Infra Recorder and instructions on ubuntu website. Restarted PC to boot from CD receive black screen with "Loading bootlogo..." then nothing happens and I have to restart with windows. The CD seems to be correct. Folders include .disk, boot, casper, dists, install, isolinux, pics, pool, preseed, autorun file, md5sum text file, readme.diskdefines file, wubi app. System Information Operating System: Windows Vista™ Home Premium (6.0, Build 6002) Service Pack 2 (6002.vistasp2_gdr.120824-0336) System Manufacturer: TOSHIBA System Model: Satellite L305 BIOS: Default System BIOS Processor: Intel(R) Pentium(R) Dual CPU T2390 @ 1.86GHz (2 CPUs), ~1.9GHz Memory: 3062MB RAM Page File: 1553MB used, 4772MB available Windows Dir: C:\Windows DirectX Version: DirectX 11 DX Setup Parameters: Not found DxDiag Version: 7.00.6002.18107 32bit Unicode Drive: D: Model: PIONEER DVD-RW DVRKD08L ATA Device Driver: c:\windows\system32\drivers\cdrom.sys, 6.00.6002.18005 (English), 4/11/2009 00:39:17, 67072 bytes

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  • Ubuntu 12.10 over Ubuntu 11.10 seems to hang

    - by Angela Trapp
    My installation of Ubuntu 12.10 over Ubuntu 11.10 seems to hang on "saving installed packages". How long should I wait before knowing for sure that something is wrong? I stopped it once and tried re-installing but am getting the same results. I'm installing from a USB stick. I'm connected to the internet using a wired connection but I'm reading here to connect to a wi-fi network while installing. Could this possibly be the issue? I can't install using wi-fi at the moment as my router was fried in a brownout yesterday. I've ordered another router online so as soon as it gets in, I'll try again. Any suggestions are appreciated! Please let me know if you need more information. It's a 32-bit installation and I have 1 GB of memory. Thanks!

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  • Open Grid Engine or Akka/Something more fault tolerant?

    - by Mike Lyons
    My use case is that I have a pipeline of independent, stand alone programs, that I want to execute in a certain order on specific pieces of data that our output from previous pipeline stages. The pipeline is entirely linear and doesn't do anything in terms of alternate paths through the pipe. I'm currently using SGE to do this and it works OK, however occasionally a job will overstep it's memory bounds, fail, and all jobs that require that output data will fail. The pipe needs to be restarted in that case, and it seems that whatever is providing the fault tolerance in akka might solve that for me?

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  • Is it a waste of time to free resources before I exit a process?

    - by Martin
    Let's consider a fictional program that builds a linked list in the heap, and at the end of the program there is a loop that frees all the nodes, and then exits. For this case let's say the linked list is just 500K of memory, and no special space managing is required. Is that a wast of time, because the OS will do that anyway? Will there be a different behavior later? Is that different according to the OS version? I'm mainly interested in UNIX based systems, but any information will be appreciated. I had today my first lesson in OS course and I'm wondering about that now.

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  • What's up with all the updates? [closed]

    - by Bob Babb
    I use Ubuntu exclusively for my job, especially for the fact that everything works and I get the most out of my processor and memory, but you are killing me with updates! I just lost a very good opportunity from a client that installed Ubuntu but got tired of all the updates. I really can't argue the fact. In a matter of a day I had two software updates. Quote from customer: "It's sad that I come in at 6:00 in the morning to install updates from a LTS version, and then before I leave at the end of the day I have 19 new updates to install. At least Microsoft bundles them in controllable groups." Sadly I have to agree, guys you have to do something about this. Please!

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  • Ad-Driven Apps Are Sucking Your Android Battery Dry

    - by Jason Fitzpatrick
    Ads in free Android apps might be annoying but you probably never imagined they were radically draining your battery. New research from Purdue University and Microsoft highlight just how much ad-driven apps tank your battery life. What did they find? That poorly designed ad-modules in free ad-driven applications are terrible at conserving energy. In popular applications like Angry Birds and Free Chess 70% of the energy the application consumed was used to drive the ads. They also surveyed other applications and found that ad-driven apps weren’t alone in excessive battery use–the New York Times app, for example, spent 15% of its battery consumption on tracking and background tasks. Hit up the link below to read the full whitepaper for a more in depth look at the methodology and results. Fine Grained Energy Accounting on Smartphones with Eprof (PDF) [via ZDNet] Make Your Own Windows 8 Start Button with Zero Memory Usage Reader Request: How To Repair Blurry Photos HTG Explains: What Can You Find in an Email Header?

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  • Sanity checks vs file sizes

    - by Richard Fabian
    In your game assets do you make room for explicit sanity checks, or do you have some generally expected bounds which you assert? I've been thinking about how we compress data and thought that it's much better to have the former, and less of the latter. If your data can exceed your normal valid ranges, but if it does it's an error, then surely that implies you're not compressing the data well enough? What do you do to find out if your data is compressed as far as it can be, and what do you use to ensure your data isn't corrupted and ensure it's an official release? EDIT I'm not interested in sanity checking the file size, but instead, how you manage your sanity checks and whether you arrange the excess size caused by the opportunity to do sanity checks by using explicit extra data, or through allowing the data enough file space (data member size) to be out of valid range and thus able to be checked merely by looking at the asset in memory after loading.

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  • Don't Call it a Comeback

    - by Chris Haaker
    I received the email like most of you about Jeff and crew stepping down and selling the blog to another company. That it is a long time associate and friend of the team we have all grown to know and love, I feel much better about the move. Who cares, Chris, you haven't blogged religiously in ages! I know, and its a crime. Blame life, Twitter, my kids, laziness or whatever else you can think of. I always tell myself I am going to make a comeback - - "Don't call it a comeback - I been here for years." But after a few posts I seem to lose my steam. Its hard to explain, hell, I can't explain it. But we'll see what happens this time. Just don't call it a comeback.  2012 rMBP 15" Quad Core 2.33 GHz 16GB Memory 258GB SSDMarsEdit 3.5 (Please Microsoft Live Team - Make LiveWriter for OS X)

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  • How do I connect a Nexus 7 to transfer files?

    - by gotqn
    I want to move some files from my PC to Nexus 7. The tablet is connected to my PC's USB port and it is successfully charging. Unfortunately, the PC is not detecting the devices - what I expected is to be shown the Nexus 7 tablet as external devices (like my USB flash memory). As the tablet is connected to the my home internet network, I have checked if it will appear in the "Networks" section but it does not. I am using Ubuntu 12.4 LTS. Is there a easy way to connect the devices to my PC and move some information between them?

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  • Verifying Office 2010 SP1 Installation

    - by Chris Heacock
    So you downloaded and installed SP1, but now you want to verify that SP1 actually installed! Looking at Outlook's Help Screen under Help->About, it isn't readily apparent that SP1 is installed. Like me, you probably expected to see 14.1.something. Perhaps 14.0.something SP1, right? If you click on that "Additional Version and Copyright Information", another window will pop up and show you a bit more useful info (if you don't have the version numbers committed to memory) That window *does* give us that comforting SP1, and now we can determine that if you have Office 14.1.6023.1000 (and beyond) you are indeed runnning Office 2010 SP1!

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  • How to "back track"?

    - by esqew
    I find that I start projects and, due to my lack of experience, find that old database structures and huge blocks of code are inefficient and memory-costly. However, by the time I realize a re-design of the entire project is needed, the project has grown to such a size that it is simply too late to go back and modify the project in its current state and requires a completely new project file and the whole shebang. How should I prevent ruts such as this one, where it is too late to go back and modify the current project to fit specifications modified far down the road from the creation of the project? (Apologies in advance for confusing grammar, it's been a long day here... as you can probably tell.)

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  • Play audio in javascript with a good performance

    - by João
    I'm developing a browser game where the player can shoot. Everytime he shoots it play a sound. Currently i'm using this code to play sounds in JavaScript: var audio = document.createElement("audio"); audio.src = "my_sound.mp3"; audio.play(); I'm worried about performance here. Will 10 simultaneous sounds impact my game performance too much? Will all audio objects stay in memory even after they are played?

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  • Subterranean IL: The ThreadLocal type

    - by Simon Cooper
    I came across ThreadLocal<T> while I was researching ConcurrentBag. To look at it, it doesn't really make much sense. What's all those extra Cn classes doing in there? Why is there a GenericHolder<T,U,V,W> class? What's going on? However, digging deeper, it's a rather ingenious solution to a tricky problem. Thread statics Declaring that a variable is thread static, that is, values assigned and read from the field is specific to the thread doing the reading, is quite easy in .NET: [ThreadStatic] private static string s_ThreadStaticField; ThreadStaticAttribute is not a pseudo-custom attribute; it is compiled as a normal attribute, but the CLR has in-built magic, activated by that attribute, to redirect accesses to the field based on the executing thread's identity. TheadStaticAttribute provides a simple solution when you want to use a single field as thread-static. What if you want to create an arbitary number of thread static variables at runtime? Thread-static fields can only be declared, and are fixed, at compile time. Prior to .NET 4, you only had one solution - thread local data slots. This is a lesser-known function of Thread that has existed since .NET 1.1: LocalDataStoreSlot threadSlot = Thread.AllocateNamedDataSlot("slot1"); string value = "foo"; Thread.SetData(threadSlot, value); string gettedValue = (string)Thread.GetData(threadSlot); Each instance of LocalStoreDataSlot mediates access to a single slot, and each slot acts like a separate thread-static field. As you can see, using thread data slots is quite cumbersome. You need to keep track of LocalDataStoreSlot objects, it's not obvious how instances of LocalDataStoreSlot correspond to individual thread-static variables, and it's not type safe. It's also relatively slow and complicated; the internal implementation consists of a whole series of classes hanging off a single thread-static field in Thread itself, using various arrays, lists, and locks for synchronization. ThreadLocal<T> is far simpler and easier to use. ThreadLocal ThreadLocal provides an abstraction around thread-static fields that allows it to be used just like any other class; it can be used as a replacement for a thread-static field, it can be used in a List<ThreadLocal<T>>, you can create as many as you need at runtime. So what does it do? It can't just have an instance-specific thread-static field, because thread-static fields have to be declared as static, and so shared between all instances of the declaring type. There's something else going on here. The values stored in instances of ThreadLocal<T> are stored in instantiations of the GenericHolder<T,U,V,W> class, which contains a single ThreadStatic field (s_value) to store the actual value. This class is then instantiated with various combinations of the Cn types for generic arguments. In .NET, each separate instantiation of a generic type has its own static state. For example, GenericHolder<int,C0,C1,C2> has a completely separate s_value field to GenericHolder<int,C1,C14,C1>. This feature is (ab)used by ThreadLocal to emulate instance thread-static fields. Every time an instance of ThreadLocal is constructed, it is assigned a unique number from the static s_currentTypeId field using Interlocked.Increment, in the FindNextTypeIndex method. The hexadecimal representation of that number then defines the specific Cn types that instantiates the GenericHolder class. That instantiation is therefore 'owned' by that instance of ThreadLocal. This gives each instance of ThreadLocal its own ThreadStatic field through a specific unique instantiation of the GenericHolder class. Although GenericHolder has four type variables, the first one is always instantiated to the type stored in the ThreadLocal<T>. This gives three free type variables, each of which can be instantiated to one of 16 types (C0 to C15). This puts an upper limit of 4096 (163) on the number of ThreadLocal<T> instances that can be created for each value of T. That is, there can be a maximum of 4096 instances of ThreadLocal<string>, and separately a maximum of 4096 instances of ThreadLocal<object>, etc. However, there is an upper limit of 16384 enforced on the total number of ThreadLocal instances in the AppDomain. This is to stop too much memory being used by thousands of instantiations of GenericHolder<T,U,V,W>, as once a type is loaded into an AppDomain it cannot be unloaded, and will continue to sit there taking up memory until the AppDomain is unloaded. The total number of ThreadLocal instances created is tracked by the ThreadLocalGlobalCounter class. So what happens when either limit is reached? Firstly, to try and stop this limit being reached, it recycles GenericHolder type indexes of ThreadLocal instances that get disposed using the s_availableIndices concurrent stack. This allows GenericHolder instantiations of disposed ThreadLocal instances to be re-used. But if there aren't any available instantiations, then ThreadLocal falls back on a standard thread local slot using TLSHolder. This makes it very important to dispose of your ThreadLocal instances if you'll be using lots of them, so the type instantiations can be recycled. The previous way of creating arbitary thread-static variables, thread data slots, was slow, clunky, and hard to use. In comparison, ThreadLocal can be used just like any other type, and each instance appears from the outside to be a non-static thread-static variable. It does this by using the CLR type system to assign each instance of ThreadLocal its own instantiated type containing a thread-static field, and so delegating a lot of the bookkeeping that thread data slots had to do to the CLR type system itself! That's a very clever use of the CLR type system.

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  • Periodic clicking sound from PC speaker

    - by John J. Camilleri
    After an update some months ago, my laptop has begun making a low, repeated clicking sound every few seconds. It is not being generated through the regular sound system, as altering the volume and even muting the sound does not make any difference. My regular audio works fine, by the way, so I am guessing this is some sort of PC speaker, since I cannot hear the click when I listen through regular headphones. Strangely, when I open the sound settings dialog the click magically disappears. I don't need to change any settings; if I simply leave the dialog open in the background then the problem disappears. Any ideas what this could be? I am running regular Ubuntu 12.04, and this is the output from lspci -v | grep -A7 -i "audio": 00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio Controller (rev 02) Subsystem: Acer Incorporated [ALI] Device 0349 Flags: bus master, fast devsel, latency 0, IRQ 44 Memory at 54200000 (64-bit, non-prefetchable) [size=16K] Capabilities: <access denied> Kernel driver in use: snd_hda_intel Kernel modules: snd-hda-intel

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