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• Switching between Discrete and Integrated GPUs

  - by void-pointer

  Hello everyone, I develop CUDA applications on my Alienware M17x portable back-breaker, which has two discrete GTX 285M GPUs and one integrated GeForce 9400M GPU. I can currently switch between them using NVIDIA's software, but I would like the ability to do so within my applications for purposes of benchmarking and general convenience. Apparently this requires the "NDA version" of NVIDIA's Driver API, which I know not how to obtain. Would using this API be the only way to accomplish what I seek, and if so, how would I obtain it? A solution using Windows APIs would also be acceptable, though less preferable to one which would leverage a cross-platform API. I have created a similar thread concerning the matter on NVIDIA's forum, which is down at the time of this writing. Thanks for reading my question; it is much appreciated!

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• Trying to update Asus BIOS: FreeDOS crashes

  - by ZekeDroid

  My UX31 zenbook is experiencing some weird shutdown behavior when the battery drops below 50% and the internet seems to agree that updating the BIOS is a good step forward since there were issue with the kernel before. I downloaded both the correct BIOS file and the windows 7 utility tool and now need to boot FreeDOS to run, however, I've tried every method out there and they all fail (or so I think): Using unetbootin's FreeDOS 1.0 image I get to an error saying it couldn't run drivers then I get to a command line on disk A:. I assumed a dead end. Using unetbootin but with the FreeDOS 1.1 version image downloaded directly: get an error of "bad or missing command interpreter". I looked online and the solutions didn't work either. So, is there an alternative to FreeDOS or to installing a BIOS that I could use?

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• Questions before I revamp my rendering engine to use shaders (GLSL)

  - by stephelton

  I've written a fairly robust rendering engine using OpenGL ES 1.1 (fixed-function.) I've been looking into revamping the engine to use OpenGL ES 2.0, which necessitates that I use shaders. I've been absorbing information all day long and still have some questions. Firstly, lighting. The fixed-function pipeline is guaranteed to have at least 8 lights available. My current engine finds lights that are "close" to the primitives being drawn and enables them; I don't know how many lights are going to be enabled until I draw a given model. Nothing is dynamically allocated in GLSL, so I have to define in a shader some number of lights to be used, right? So if I want to stick with 8, should I write my general purpose shader to have 8 lights and then use uniforms to tell it how many / which lights to use? Which brings me to another question: should I be concerned with the amount of data I'm allocating in a shader? Recent video cards have hundreds of "stream processors." If I've got a fragment shader being used on some number of fragments in a given triangle, I assume they must each have their own stack to work on. Are read-only variables copied here, or read when needed? My initial goal is to rework my code so that it is virtually identical to the current implementation. What I have in mind is to create my own matrix stack so that I can implement something along the lines of push/popMatrix and apply all my translations, rotations, and scales to this matrix, then provide the matrix to the vertex shader so that it can make very quick vertex translations. Is this approach sound? Edit: My original intention was to ask if there was a tutorial that would explain the bare minimum necessary to jump from fixed-function to using shaders. Thanks!

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• Creating your own computer! [closed]

  - by AntonioCS

  I recently found this article on a guy that built his own computer. It's just a bunch of wire (as far as I can tell any way) and I was just wondering what would I have to learn/read/do to make such a thing (or at least to have a really basic understanding of what he did). He also made his own operating system, which I find really impressive. I know it will take a while and I am in no hurry. Note: I am a web programmer and also have done some desktop apps (a few years ago).

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• How Is My Computer Able to Restart Itself?

  - by Jason Fitzpatrick

  It’s such a common place activity that most of us have likely never stopped to even think about it: the automatic restart. Whether user or application-initiated, what exactly happens when your computer cycles its own power? Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-drive grouping of Q&A web sites. How Hackers Can Disguise Malicious Programs With Fake File Extensions Can Dust Actually Damage My Computer? What To Do If You Get a Virus on Your Computer

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• Install a i386 printer driver into an amd64 distribution or how can I find a good printer based on features?

  - by Yanick Rochon

  Hi, I just bought a Lexmark Interpret S408 all-in-one printer. The box said that it supported Ubuntu 8.04, but I told myself it should work with Lucid... well no. The only driver I have found is for i386 while I have a amd64 image installed; the architecture is incompatible. So, the quesiton is : Is it possible to install that driver anyway, somehow? Or do I need to take that printer back to the store and buy another one? If the latter is the only alternative, I need a printer that has wireless connection capability can do color printing is of good price (less than $200 CAD) Thank you for your answers, help, and tips. ** UPDATE ** The driver was given in the form of deb package (for Debian distributions) and I managed to extract the actual deb package driver out of the install program. I ran sudo dpkg -i --force-all lexmark-inkjet-09-driver-1.5-1.i386.deb and the driver installed, and I was able to print something out. But that pretty much ends there; I cannot access anymore of the printer settings, etc. (i.g. scanner, fax, wifi settings, etc.) I should suffice for now as I'm satisfied with the printer's features (and size, and prince), but if I could have a full-linux-supported printer like that one, I would return this one in exchange for the other.

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• What Exactly Does the Wattage Rating on a Power Supply Unit Mean?

  - by Jason Fitzpatrick

  Your PSU is rated 80 Plus Bronze and for 650 watts, but what exactly does that mean? Read on to see how wattage and power efficiency ratings translate to real world use. Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-drive grouping of Q&A web sites. How To Use USB Drives With the Nexus 7 and Other Android Devices Why Does 64-Bit Windows Need a Separate “Program Files (x86)” Folder? Why Your Android Phone Isn’t Getting Operating System Updates and What You Can Do About It

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• How to install a Logitech webcam?

  - by Agnese

  I'm having problems with installing a webcam: Archive: /media/LWS_2_0/Setup.exe [/media/LWS_2_0/Setup.exe] End-of-central-directory signature not found. Either this file is not the last disk(s) of this archive. zipinfo: cannot find zipfile directory in one of /media/LWS_2_0/Setup.exe or /media/LWS_2_0/Setup.exe.zip, and cannot find /media/LWS_2_0/Setup.exe.ZIP, period. How do I solve this?

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• For business information and web traffic T4 and Solaris 11 stand head and shoulders above the crowd

  - by rituchhibber

  Everyone is talking about encryption of business information and web traffic. T4 and Solaris 11 stand head and shoulders above the crowd. Each T4 chip has 8 crypto accelerators inside the chip - that means there are 32 in a T4-4.  These are faster and offer more algorithms than almost all standalone devices and it is all free with T4!  What are you waiting for?Please contact Lucy Hillman or Graham Scattergood for more details.Your weekly tea time soundbite of the latest UK news, updates and initiatives on the SPARC T Series servers. T4 good news, best practice and feedback is always welcome.

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• Product Launch: Oracle Optimized Storage: Solutions for Simplifying IT

  - by swalker

  On July 18, 2012 at 10am PT 17pm UK Time, Oracle is hosting an online storage launch event featuring Mark Hurd, John Fowler, and several other Oracle executives.  This event will consist of 3 different webcasts, all detailing our latest messaging, momentum, and product innovations. Highlights include: Even in the most advanced data centers, outdated and inefficient storage management techniques are stifling business innovation. But now you can deploy Oracle’s optimized storage, the industry’s most advanced, easy-to-use, and cost-effective enterprise storage solutions. Learn about the benefits of Oracle’s latest storage innovations, including: How you can take on the biggest enterprise storage infrastructure challenges—including reducing costs and increasing data management efficiency A deep-dive discussion into Oracle’s storage innovations, featuring the leaders of Oracle’s storage development organizations A first look at Oracle’s newest scalable storage solution for midsize businesses Join Mark Hurd and John Fowler for this important online launch event. Register NOW

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• Please Help to bring back power to my machine

  - by Acess Denied

  I Have a samsung N150plus netbook That I have been using for a while now. I left it on and plugged to a wall outlet and went to bed. I dual boot ubuntu and win7. I tried to update the win7 to sp1 and I dozed off. I woke up and saw the machine has been booted to ubuntu and logged in as guest, which translate to mean one of my room mates have tried to use the machine and they all have denied using my machine. I tried to reboot to windows and then it appears to have no cpu, hard disk and cpu fan activity. only one led seems to come on when i plug it in. its only the led that indicate the machine is powered on powers steadily. I really cant afford to buy a new machine now and I need the machine to complete my last project in school for my last year. Help Please

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• TODAY! Partner Webcast: SPARC Marketing And Go-To-Market

  - by swalker

  THURSDAY, JUNE 21ST, 2012 AT 2:00 PM GMT (3:00 PM CET) Dear partner Oracle is pleased to invite you to our new webinar series on "Sparc Marketing and Go-to-Market" intended for our partners. Please join our second session in a series of new monthly webinars focused on everything related to SPARC and specifically designed to provide insights and selling guidance for channel partners worldwide on Thursday, June 21. Agenda: This month's guest speaker will focus on SPARC / T4 Marketing: a review of current assets and where we are going into FY13. Our presenter will be Bud Koch, Sr Principal Product Marketing Director. Please mark your diaries for this date and be sure to join. JOINING INFORMATION International Toll Free Dial-in Conference call ID: 90617465 Password: sparc To join the WebEx Conference Meeting Number: 590 744 943 Meeting Password: sparc REGISTER Delivery Format This FREE online LIVE eSeminar will be delivered over the Web and Conference Call. Duration 1 hour For assistance 1. Go to https://oraclemeetings.webex.com/oraclemeetings/mc 2. On the left navigation bar, click "Support". Note: Please join the call 10 minutes before the scheduled start time. We look forward to your participation. Best regards, Cinzia Mascanzoni EMEA Partner Marketing Director Giuseppe Facchetti EMEA Partner Business Development Manager

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• How do I install drivers for an AMD Radeon HD 6450?

  - by vanysha

  Hi everyone! I bought new computer. The Graphics card is AMD Radeon HD 6450, on Windows 7 it works fine but I try to install driver on Ubuntu, and it says that "No supported adapters detected". I downloaded the driver from here. After installing "Aditional drivers" says that driver is installed. Also my screen resolution in Ubuntu is not maximum. Can you help me install proper driver, please? Thanks in advance!

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• How to disable integrated webcam and still be able to use an external one

  - by alikasundara

  I am looking for a way to disable the webcam that is integrated into my laptop. The webcam is using uvcvideo module but I do not want to blacklist it since it is also being used by an external webcam I have. Is there any way of disabling the device itself without touching the modules list? This is how the webcams are listed by lsusb. The first one is an integrated one (It is identified by some apps as BisonCam NB Pro), the second one is the external Logitech C525: Bus 002 Device 004: ID 5986:0361 Acer, Inc Bus 003 Device 002: ID 046d:0826 Logitech, Inc. I have already checked BIOS - there is no way of disabling the webcam from there. Besides I would love to learn how to disable the device by ID anyway. Thanks!

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• How is Logitech C510 HD Webcam

  - by Ashfame

  I am going to buy Logitech C510 HD webcam and I just checked on other questions here on AskUbuntu that it works out of the box with cheese. Jorge's response also confirm this and I feel confident buying it now. My question is can it be limited in any functionality that I would like to do with it? I would like it to be used with everything - Skype, Gtalk video chat, Facebook, Youtube etc. Also this may sound lame but I need to know whether I could record or do a video call in lesser resolution video (its a 720p one)? Edit: Ported part of this question to another question to make it more specific.

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• How to reduce fan noise with some latest Dell laptops, Desktop PC's?

  - by YumYumYum

  I have a few new Dell laptops and desktop PC's. Some of them have extremely noisy fans. The technicians who are sent by Dell refuse to attempt to fix things when they see that the OS is Ubuntu. They seem to be comfortable dealing with machines running MS Windows. For Linux, is there any way to slow or lower the fan speed? Please can anyone advise how it should be done. I have tried lm_sensors but failed.

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• Services d'installation partenaire pour les Matériels Oracle

  - by swalker

  Suivant la méthodologie Oracle's Enterprise Installation Services (EIS), les installations matérielles réalisées par des partenaires OPN Specialized sont reconnues par Oracle dans le cadre de la garantie produit et du support. Les partenaires qui procèdent à des installations sont désormais tenus d'accepter l'Avenant pour les services d'installation Oracle et de signaler ces installations à Oracle.  Cliquez ici pour en savoir plus.

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• What are some tablets that can run Ubuntu?

  - by tacozmeister

  I can't believe I'm actually asking this, but what are some good, cheap tablets that can run Ubuntu? I'm considering getting a tablet, but I don't really want an expensive one like an iPad. And I love Ubuntu. So what tablets are out there that are cheap, but can also run Ubuntu 12.04 without much lag if it's installed after purchase? Personal anecdotes would be appreciated! Note: I'm not asking you to help me shop, just to formulate a list of tablets (+personal preference) that can use Ubuntu.

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• Ask the Readers: How Do You Give an Old Laptop a New Life?

  - by Jason Fitzpatrick

  That powerhouse laptop you bought back in 2006 can’t compete with the sleek ultrabook you just unboxed–but that doesn’t mean you should ship it to the dump. How do you give an old laptop a new lease on life? Whether you tear it apart and rebuild it into something brand new, put it on night duty as a backup station, or install a lightweight Linux distro before passing it on to your relatives, we want to hear all about your tools and methods for keeping old laptops out of the junk bin. However big or small your repurposing project, sound off in the comments below with your tips, tricks, and tools. Make sure to check back in on Friday for the What You Said roundup to see how your fellow readers revitalize their old laptops. How To Delete, Move, or Rename Locked Files in Windows HTG Explains: Why Screen Savers Are No Longer Necessary 6 Ways Windows 8 Is More Secure Than Windows 7

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• booth multiplication algorithm

  - by grassPro

  Is booth algorithm for multiplication only for multiplying 2 negative numbers (-3 * -4) or one positive and one negative number (-3 * 4) ? Whenever i multiply 2 positive numbers using booth algorithm i get a wrong result. example : 5 * 4 A = 101 000 0 // binary of 5 is 101 S = 011 000 0 // 2's complement of 5 is 011 P = 000 100 0 // binary of 4 is 100 x = 3 y = 3 m = 5 -m = 2's complement of m r = 4 After right shift of P by 1 bit 0 000 100 After right shift of P by 1 bit 0 000 010 P+S = 011 001 0 After right shift by 1 bit 0 011 001 Discarding the LSB 001100 But that comes out to be the binary of 12 . It should have been 20(010100)

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• Are Modern Computers Still Vulnerable to Damage via Magnets?

  - by Jason Fitzpatrick

  It’s such an oft repeated warning that it’s firmly embedded in nerd lore: bring a magnet anywhere near your precious computer and suffer the dire consequences. But is true? Is your computer one run in with a novelty magnet away from digital death? Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-drive grouping of Q&A web sites. How To Create a Customized Windows 7 Installation Disc With Integrated Updates How to Get Pro Features in Windows Home Versions with Third Party Tools HTG Explains: Is ReadyBoost Worth Using?

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• How Do Computers Work? [closed]

  - by Rob P.

  This is almost embarrassing ask...I have a degree in Computer Science (and a second one in progress). I've worked as a full-time .NET Developer for nearly five years. I generally seem competent at what I do. But I Don't Know How Computers Work! Please, bare with me for a second. A quick Google of 'How a Computer Works' will yield lots and lots of results, but I struggled to find one that really answered what I'm looking for. I realize this is a huge, huge question, so really, if you can just give me some keywords or some direction. I know there are components....the power supply, the motherboard, ram, CPU, etc...and I get the 'general idea' of what they do. But I really don't understand how you go from a line of code like Console.Readline() in .NET (or Java or C++) and have it actually do stuff. Sure, I'm vaguely aware of MSIL (in the case of .NET), and that some magic happens with the JIT compiler and it turns into native code (I think). I'm told Java is similar, and C++ cuts out the middle step. I've done some mainframe assembly, it was a few years back now. I remember there were some instructions and some CPU registers, and I wrote code....and then some magic happened....and my program would work (or crash). From what I understand, an 'Emulator' would simulate what happens when you call an instruction and it would update the CPU registers; but what makes those instructions work the way they do? Does this turn into an Electronics question and not a 'Computer' question? I'm guessing there isn't any practical reason for me to understand this, but I feel like I should be able to. (Yes, this is what happens when you spend a day with a small child. It takes them about 10 minutes and five iterations of asking 'Why?' for you to realize how much you don't know)

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• The Evolution of Computer Keyboards

  - by Jason Fitzpatrick

  While the basic shape of keyboards has remained largely unchanged over the last thirty years, the guts have undergone several transformations. Read on to explore the history of the computer keyboard. ComputerWorld delves into the history of the modern keyboard, including the heavy influence IBM’s extensive keyboard research on early keyboards: As far as direct influences on the modern computer keyboard, IBM’s Selectric typewriter was one of the biggest. IBM released the first model of its iconic electromechanical typewriter in 1961, a time when being able to type fast and accurately was a highly sought-after skill. Dag Spicer, senior curator at the Computer History Museum, notes that as the Selectric models rose to prominence, admins grew to love the feel of the keyboard because of IBM’s dogged focus on making the ergonomics comfortable. “IBM’s probably done more than anyone to find [keyboard] ergonomics that work for everyone,” Spicer says. So when the PC hit the scene a decade or two later, the Selectric was largely viewed as the baseline to design keyboards for those newfangled computers you could put in your office or home. Hit up the link below to continue reading about how the Selectric influenced keyboards throughout the 1980s and what replaced the crisp clacking of early IBM-styled models. 6 Ways Windows 8 Is More Secure Than Windows 7 HTG Explains: Why It’s Good That Your Computer’s RAM Is Full 10 Awesome Improvements For Desktop Users in Windows 8

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• Elantech trackpad being identified as a logitech wheel mouse

  - by user11895

  I recently purchased a Samsung RF510 laptop computer, which I absolutely love. However, upon installing Ubuntu 10.10 onto it I couldn't get the trackpad to function properly. It worked as a basic mouse (point and click) but had no functionality for edge scrolling or any of the multitouch settings the trackpad is capable of. After doing a lot of research I discovered the reason is a known issue where the Ubuntu kernel will improperly detect an Elantech trackpad as a logitech PS/2 wheel mouse, and as such will gain none of the functionality that seems to be coded for synaptics trackpads. The question I have is: does anyone know a way to get this working properly? This is my first time trying to run Ubuntu on a laptop (actually, it's my first laptop in the last 12 years) and I'm finding the experience to be intolerable without the basic scrolling/zooming/etc I've been used to using for as long as I can remember.

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• Apple wireless mouse and keyboard doens't work

  - by drigoSkalWalker

  I paired the mouse and keyboard on ubuntu, but it seems not work. I got this error in /var/log/syslog kernel: [ 1875.935712] input: Apple Magic Mouse as /devices/pci0000:00/0000:00:12.0/usb4/4-3/4-3:1.0/bluetooth/hci0/hci0:2/input34 kernel: [ 1875.935885] evdev: no more free evdev devices kernel: [ 1875.935893] input: failed to attach handler evdev to device input34, error: -23 kernel: [ 1875.936049] magicmouse 0005:05AC:030D.0003: input,hidraw0: BLUETOOTH HID v3.06 Mouse [Apple Magic Mouse] on 00:19:5D:0F:4A:F6 kernel: [ 2334.787710] input: Apple Wireless Keyboard as /devices/pci0000:00/0000:00:12.0/usb4/4-3/4-3:1.0/bluetooth/hci0/hci0:4/input36 kernel: [ 2334.787729] evdev: no more free evdev devices kernel: [ 2334.787737] input: failed to attach handler evdev to device input36, error: -23 kernel: [ 2334.787999] generic-bluetooth 0005:05AC:0255.0005: input,hidraw1: BLUETOOTH HID v0.50 Keyboard [Apple Wireless Keyboard] on 00:19:5D:0F:4A:F6 Nothing appears in xinput --list, only the wired mouse and keyboard. How to fix that?

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