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• 12.04 Black screen with blinking cursor

  - by Junaid

  I have read this post My computer boots to a black screen, what options do I have to fix it? UBUNTU 12.04 works well with livecd but fails to start after complete installation, black screen with a blinking cursor. I tried holding shift key and edit grub options but holding shift did not do anything. I give up, any suggestion. I have built in intel graphics card and an nvidia card in PCI. I have tried by removing nvidia card as well. All I see is a black screen with a blinking cursor. My system is Dell optiplex GX260 with 1GB ram and 2.4 GHz P4 processor

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• How do I fix an overheating problem with an HP ENVY-4 ultrabook?

  - by ashutosh jain

  I have bought a new HP ENVY-4 ultrabook. It has an i5 processor, preinstalled windows7 and 2GB radeon graphics card. What happened was when I started using ubuntu it showed overheating. I ignored it but after a few days it burnt my laptop battery to 0% capacity. It was just one month old so I got the battery replaced for free. I tried installing linux mint but it also showed overheating. I tried fedora17 but it didn't installed fine. On windows it is running perfectly fine and it's not even heating a bit. Now anyone please suggest whats the problem with ubuntu and how can I overcome with it. I am a computer science guy so I can't work without linux and this machine is then like a waste for me.

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• Why do [flush-8:16] and [jbd2/sdb2-8] occasionally use 99.99% disk IO?

  - by ændrük

  Approximately twice a week, the entire graphical interface will lock up for about 10-20 seconds without warning while I am doing simple tasks such as browsing the web or writing a paper. When this happens, GUI elements do not respond to mouse or keyboard input, and the System Monitor applet displays 100% IOWait processor usage. Today, I finally happened to have GNOME Terminal already open when the problem started. Despite other applications such as Google Chrome, Firefox, GNOME Do, and GNOME Panel being unresponsive, the terminal was usable. I ran iotop and observed that commands named [flush-8:16] and [jbd2/sdb2-8] were alternately using 99.99% IO. What are these, and how can I prevent them from causing GUI unresponsiveness? Here is dumpe2fs /dev/sdb2, if it's relevant.

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• Drawing territories border in 2d map

  - by Gabriel A. Zorrilla

  I'm programming a little web strategy game. In the country map I pretend to display each country with a national color. The issue is how to render the borders in a simple and efficient way. Right now I'm planning to set a field to each tile called "border" with values from 0 to 8. The algorithm would check for EVERY tile is its adjacent has a different "owner". If the tile is inside the territory, the border value would be 0, because would not have adjacent any tile with different owner, if not, would vary between 1 (north) clockwise to 9 (north-west) and then draw the border. I find this simple but too processor-intensive. Are there any other "pro" choices to render territories borders?

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• SPARC M7 Chip - 32 cores - Mind Blowing performance

  - by CarylTakvorian-Oracle

  Now that we've just announced our Next Generation Processor at the HotChips HC26 conference , my colleague Angelo Rajadurai has a great write-up on what was announced and what this could mean for our ISV partners, covering in particular the SPARC M7 new Software-in-Silicon features such as Application Data Integrity and the In-Memory Query Accelerator. During the same presentation we also introduced the SPARC Accelerated Program to provide our partners and third party developers access to all the goodness of the M7's SPARC Application Acceleration features. Please get in touch with us if you are interested in knowing more about this program.

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• How can I prevent [flush-8:16] and [jbd2/sdb2-8] from causing GUI unresponsiveness?

  - by ændrük

  Approximately twice a week, the entire graphical interface will lock up for about 10-20 seconds without warning while I am doing simple tasks such as browsing the web or writing a paper. When this happens, GUI elements do not respond to mouse or keyboard input, and the System Monitor applet displays 100% IOWait processor usage. Today, I finally happened to have GNOME Terminal already open when the problem started. Despite other applications such as Google Chrome, Firefox, GNOME Do, and GNOME Panel being unresponsive, the terminal was usable. I ran iotop and observed that commands named [flush-8:16] and [jbd2/sdb2-8] were alternately using 99.99% IO. What are these, and how can I prevent them from causing GUI unresponsiveness? Details $ mount | grep ^/dev /dev/sda1 on / type ext4 (rw,noatime,discard,errors=remount-ro,commit=0) /dev/sdb2 on /home type ext4 (rw,commit=0) /dev/sda is an OCZ-VERTEX2 and /dev/sdb is a WD10EARS. Here is dumpe2fs /dev/sdb2, if it's relevant.

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• Corrupt plymouth boot screen when using properietary Nvidia drivers

  - by Tejas Hosangadi

  I recently got the final version of Ubuntu Natty Narwhal x64 and everything is working just fine. The only thing I am having trouble with is the boot screen. After I installed the proprietary nVidia drivers, the boot screen becomes corrupt and only shows text (as it has been doing since Ubuntu 10.04). When I followed the instructions to fix the boot screen in 10.04 and 10.10, the boot screen still remains the same and the problem isn't resolved. Please give a full guide on how to fix this problem. Machine Details Computer : HP Pavilion p6240in Processor : Core 2 duo Memory : 4096 megabytes Graphics : nVidia G210 3d graphics Monitor : Dell 17 inch lcd Another question I would like to ask is whether it is possible to use this script (http://www.webupd8.org/2010/10/script-to-fix-ubuntu-plymouth-for.html) with 11.04. I am asking this question because it says that the script works only with 10.04 and 10.10.

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• I can not connect to the Internet with cable

  - by Diego Castro

  tengo un computador de escritorio (board: gigabyte h61m, procesador: intel core i3 de 64 bits, ram: ddr3 4 GB) y puedo acceder a internet normalmente desde Windows 7 (mi conexión es por cable directamente al modem (referencias del modem: D-link DSL-2640T)) e instale Ubuntu 11.04 y no puedo acceder a internet, probé con Ubuntu 10.04 (que es el que tengo actualmente instalado) y tampoco funciono no se que debo configurar ni que hacer, simplemente no se conecta, he intentado cambiando de modo automatico a modo manual en ipv4 y colocando los datos correspondientes (dirección IP, máscara de red y servidores de DNS) y no logro conectarme aún, agradezco la ayuda machine traslator Hi, I have a desktop (board: gigabyte h61m, Processor: Intel Core i3 64-bit RAM: 4 GB ddr3) and I can access the internet normally from Windows 7 (my connection is wired directly to the modem (modem references : D-link DSL-2640T)) and install Ubuntu 11.04 and I can not access the internet, I tried Ubuntu 10.04 (which is what I have currently installed) and worked either not set or that I should do, just does not connect, I tried switching from automatic mode to manual mode ipv4 and placing the data (IP address, subnet mask and DNS servers) and I can not even connect, appreciate the help

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• Good Atom Based Tablets that run Ubuntu?

  - by Anthony Papillion

  I'm starting a software project for a company that will deploy on tablet computers. They want to stick with Intel processors so they are looking for a good tablet that runs on an Atom processor. MY requirement is that it needs to also be able to run Ubuntu. It doesn't have to come with Ubuntu, I just need to be able to install it with no hassle. But, if it comes with Ubuntu preinstalled, that's even better. Can anyone make a recommend? Thanks! Anthony

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• assigning values to shader parameters in the XNA content pipeline

  - by Nick

  I have tried creating a simple content processor that assigns the custom effect I created to models instead of the default BasicEffect. [ContentProcessor(DisplayName = "Shadow Mapping Model")] public class ShadowMappingModelProcessor : ModelProcessor { protected override MaterialContent ConvertMaterial(MaterialContent material, ContentProcessorContext context) { EffectMaterialContent shadowMappingMaterial = new EffectMaterialContent(); shadowMappingMaterial.Effect = new ExternalReference<EffectContent>("Effects/MultipassShadowMapping.fx"); return context.Convert<MaterialContent, MaterialContent>(shadowMappingMaterial, typeof(MaterialProcessor).Name); } } This works, but when I go to draw a model in a game, the effect has no material properties assigned. How would I go about assigning, say, my DiffuseColor or SpecularColor shader parameter to white or (better) can I assign it to some value specified by the artist in the model? (I think this may have something to do with the OpaqueDataDictionary but I am confused on how to use it--the content pipeline has always been a black box to me.)

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• Autoscaling in a modern world&hellip;. Part 2

  - by Steve Loethen

  When we last left off, we had a web application spinning away in the cloud, and a local console application watching it and reacting to changes in demand.  Reactions that were specified by a set of rules.  Let’s talk about those rules. Constraints.  The first set of rules this application answered to were the constraints. Here is what they looked like: <constraintRules> <rule name="default" enabled="true" rank="1" description="The default constraint rule"> <actions> <range min="1" max="4" target="AutoscalingApplicationRole"/> </actions> </rule> </constraintRules> Pretty basic.  We have one role, the “AutoscalingApplicationRole”, and we have decided to have it live within a range of 1 to 4.  This rule does not adjust, but instead, set’s limits on what other rules can do.  It has a rank, so you can have you can specify other sets of constraints, perhaps based on time or date, to allow for deviations from this set.  But for now, let’s keep it simple.  In the real world, you would probably use the minimum to set a lower end SLA.  A common value might be a 2, to prevent the reactive rules from ever taking you down to 1 role.  The maximum is often used to keep a rule from driving the cost up, setting an upper limit to prevent you waking up one morning and find a bill for hundreds of instances you didn’t expect.  So, here we have the range we want our application to live inside.  This is good for our investigation and testing.  Next, let’s take a look at the reactive rules.  These rules are what you use to react (hence reactive rules) to changing demands on your application.  The HOL has two simple rules.  One that looks at a queue depth, and one that looks at a performance counter that reports cpu utilization.  the XML in the rules file looks like this: <reactiveRules> <rule name="ScaleUp" rank="10" description="Scale Up the web role" enabled="true"> <when> <any> <greaterOrEqual operand="Length_05_holqueue" than="10"/> <greaterOrEqual operand="CPU_05_holwebrole" than="65"/> </any> </when> <actions> <scale target="AutoscalingApplicationRole" by="1"/> </actions> </rule> <rule name="ScaleDown" rank="10" description="Scale down the web role" enabled="true"> <when> <all> <less operand="Length_05_holqueue" than="5"/> <less operand="CPU_05_holwebrole" than="40"/> </all> </when> <actions> <scale target="AutoscalingApplicationRole" by="-1"/> </actions> </rule> </reactiveRules> <operands> <performanceCounter alias="CPU_05_holwebrole" performanceCounterName="\Processor(_Total)\% Processor Time" source="AutoscalingApplicationRole" timespan="00:05:00" aggregate="Average" /> <queueLength alias="Length_05_holqueue" queue="hol-queue" timespan="00:05:00" aggregate="Average"/> </operands> These rules are currently contained in a file called rules.xml, that is in the root of the console application.  The console app, starts up, grabs the rules and starts watching the 2 operands.  When it detects a rule has been satisfied, it performs the desired action.  (here, scale up or down my 1). But I want to host the autoscaler  in the cloud.  For my first trick, I will move the rules (and another file called services.xml) to azure blob storage.  Look for part 3.

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• General input/output error on OpenOffice 3.2

  - by Scott

  I have been working on a research paper in OpenOffice 3.2 Word Processor and I had a slide show OpenOffice 3.2 Presentation. I saved both frequently and they were not very big (no more then 5 pages of text or a few slides). A few days after I last edited and saved them, I tried to open the slide show but I received window saying: General Error. General input/output error When I tried opening the paper, it asked for ASCII Filter Options (font, character, language, and paragraph break). When I set the normal settings, a single blank document opened with nothing on it. I looked at both of the file's properties and the size was 0 or 1.5 KB, and the volume was unknown. I recently installed some updates for Ubuntu 10.10 and everything else in my computer is working normally including other documents and slide shows. Is this a fixable crash?

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• New Computer

  - by Matt Christian

  Last night I received my computer that was ordered with my tax return money.  Here are the specs of my old computer: - Pentium 4 Processor - 3-4 GB RAM - ~256 GB HDD space (2 drives) - nVidia card (AGP 8x) Sorry I can't be more specific, my memory is gone :p  Here are the new computer specs (mostly): - 2.8ghz Pentium i7 quadcore - 6 GB RAM - 1 TB HDD space (1 drive) - 1 GB Radeon card (PCI-X) I also got a new monitor (22" Asus with HDMI) so will be using my 19" widescreen as a secondary monitor. If I remember I'll hop on here and post the specifics later on...

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• ASUS Q500A will not boot from live DVD

  - by Sly

  I just purchased a new PC yesterday, an ASUS Q500A. I downloaded Ubuntu 12.10, burned it to a DVD, and tried to install it. As expected, I came to a screen that asked if I wanted to try, install, OEM install, or check the disc. After going to try, the DVD spins up as if it's about to boot the system and then immediately spins down again to leave a black screen. I've tried several boot options: noacpi nolacpi acpi=off Removing quiet splash -- nolacpi results in the DVD drive not spinning up at all. The rest have no effect. Some stats about the system: Intel i5-3210M processor Intel Integrated Graphics 4000 Any tips on other things to try?

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• Error during Edubuntu installation: process:226

  - by Chethan S.

  We recently introduced Edbuntu to a team of school teachers. One of them tried installing Edubuntu in their school computers and have reported us this problem. I have no answer for the problem. So can anyone help? One of the teacher's wrote: I was able to install edubuntu in some of the pc. But not able to install in PCs with celeron processor 2.40 GHz , 1GB RAM & HDD 40GB. Im getting error message: process:226 - Glib warning: getpwuid_r(): failed due to unknown user id(0)

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• SPARC T4-4 Delivers World Record First Result on PeopleSoft Combined Benchmark

  - by Brian

  Oracle's SPARC T4-4 servers running Oracle's PeopleSoft HCM 9.1 combined online and batch benchmark achieved World Record 18,000 concurrent users while executing a PeopleSoft Payroll batch job of 500,000 employees in 43.32 minutes and maintaining online users response time at < 2 seconds. This world record is the first to run online and batch workloads concurrently. This result was obtained with a SPARC T4-4 server running Oracle Database 11g Release 2, a SPARC T4-4 server running PeopleSoft HCM 9.1 application server and a SPARC T4-2 server running Oracle WebLogic Server in the web tier. The SPARC T4-4 server running the application tier used Oracle Solaris Zones which provide a flexible, scalable and manageable virtualization environment. The average CPU utilization on the SPARC T4-2 server in the web tier was 17%, on the SPARC T4-4 server in the application tier it was 59%, and on the SPARC T4-4 server in the database tier was 35% (online and batch) leaving significant headroom for additional processing across the three tiers. The SPARC T4-4 server used for the database tier hosted Oracle Database 11g Release 2 using Oracle Automatic Storage Management (ASM) for database files management with I/O performance equivalent to raw devices. This is the first three tier mixed workload (online and batch) PeopleSoft benchmark also processing PeopleSoft payroll batch workload. Performance Landscape PeopleSoft HR Self-Service and Payroll Benchmark Systems Users Ave Response Search (sec) Ave Response Save (sec) Batch Time (min) Streams SPARC T4-2 (web) SPARC T4-4 (app) SPARC T4-2 (db) 18,000 0.944 0.503 43.32 64 Configuration Summary Application Configuration: 1 x SPARC T4-4 server with 4 x SPARC T4 processors, 3.0 GHz 512 GB memory 5 x 300 GB SAS internal disks 1 x 100 GB and 2 x 300 GB internal SSDs 2 x 10 Gbe HBA Oracle Solaris 11 11/11 PeopleTools 8.52 PeopleSoft HCM 9.1 Oracle Tuxedo, Version 10.3.0.0, 64-bit, Patch Level 031 Java Platform, Standard Edition Development Kit 6 Update 32 Database Configuration: 1 x SPARC T4-4 server with 4 x SPARC T4 processors, 3.0 GHz 256 GB memory 3 x 300 GB SAS internal disks Oracle Solaris 11 11/11 Oracle Database 11g Release 2 Web Tier Configuration: 1 x SPARC T4-2 server with 2 x SPARC T4 processors, 2.85 GHz 256 GB memory 2 x 300 GB SAS internal disks 1 x 100 GB internal SSD Oracle Solaris 11 11/11 PeopleTools 8.52 Oracle WebLogic Server 10.3.4 Java Platform, Standard Edition Development Kit 6 Update 32 Storage Configuration: 1 x Sun Server X2-4 as a COMSTAR head for data 4 x Intel Xeon X7550, 2.0 GHz 128 GB memory 1 x Sun Storage F5100 Flash Array (80 flash modules) 1 x Sun Storage F5100 Flash Array (40 flash modules) 1 x Sun Fire X4275 as a COMSTAR head for redo logs 12 x 2 TB SAS disks with Niwot Raid controller Benchmark Description This benchmark combines PeopleSoft HCM 9.1 HR Self Service online and PeopleSoft Payroll batch workloads to run on a unified database deployed on Oracle Database 11g Release 2. The PeopleSoft HRSS benchmark kit is a Oracle standard benchmark kit run by all platform vendors to measure the performance. It's an OLTP benchmark where DB SQLs are moderately complex. The results are certified by Oracle and a white paper is published. PeopleSoft HR SS defines a business transaction as a series of HTML pages that guide a user through a particular scenario. Users are defined as corporate Employees, Managers and HR administrators. The benchmark consist of 14 scenarios which emulate users performing typical HCM transactions such as viewing paycheck, promoting and hiring employees, updating employee profile and other typical HCM application transactions. All these transactions are well-defined in the PeopleSoft HR Self-Service 9.1 benchmark kit. This benchmark metric is the weighted average response search/save time for all the transactions. The PeopleSoft 9.1 Payroll (North America) benchmark demonstrates system performance for a range of processing volumes in a specific configuration. This workload represents large batch runs typical of a ERP environment during a mass update. The benchmark measures five application business process run times for a database representing large organization. They are Paysheet Creation, Payroll Calculation, Payroll Confirmation, Print Advice forms, and Create Direct Deposit File. The benchmark metric is the cumulative elapsed time taken to complete the Paysheet Creation, Payroll Calculation and Payroll Confirmation business application processes. The benchmark metrics are taken for each respective benchmark while running simultaneously on the same database back-end. Specifically, the payroll batch processes are started when the online workload reaches steady state (the maximum number of online users) and overlap with online transactions for the duration of the steady state. Key Points and Best Practices Two Oracle PeopleSoft Domain sets with 200 application servers each on a SPARC T4-4 server were hosted in 2 separate Oracle Solaris Zones to demonstrate consolidation of multiple application servers, ease of administration and performance tuning. Each Oracle Solaris Zone was bound to a separate processor set, each containing 15 cores (total 120 threads). The default set (1 core from first and third processor socket, total 16 threads) was used for network and disk interrupt handling. This was done to improve performance by reducing memory access latency by using the physical memory closest to the processors and offload I/O interrupt handling to default set threads, freeing up cpu resources for Application Servers threads and balancing application workload across 240 threads. See Also Oracle PeopleSoft Benchmark White Papers oracle.com SPARC T4-2 Server oracle.com OTN SPARC T4-4 Server oracle.com OTN PeopleSoft Enterprise Human Capital Management oracle.com OTN PeopleSoft Enterprise Human Capital Management (Payroll) oracle.com OTN Oracle Solaris oracle.com OTN Oracle Database 11g Release 2 Enterprise Edition oracle.com OTN Disclosure Statement Oracle's PeopleSoft HR and Payroll combined benchmark, www.oracle.com/us/solutions/benchmark/apps-benchmark/peoplesoft-167486.html, results 09/30/2012.

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• Skipping video and audio with PS3MediaServer

  - by MaxMackie

  I'm using the latest PS3MediaServer build right from the repos suggested in the Ubuntu Wiki. I'm streaming multiple movies from my server (Ubuntu 10.04 LTS) to my PS3 over wireless. Sometimes, during some movies, the audio and the video will begin skipping. This can last anywhere between 5 and 30 seconds before it goes back to normal. I have a four core i5 processor and 8GB of DDR3 RAM so I don't think my computer is having a hard time keeping up with the transcoding. So this leads me to believe it's either sub-optimal transcoding options from within PS3MS or my network can't handle the heat. Other than the out-of-box configuration, is there any way I can tweak the settings for the application to use my resources more efficiently?

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• Data Storage Options

  - by Kenneth

  When I was working as a website designer/engineer I primarily used databases for storage of much of my dynamic data. It was very easy and convenient to use this method and seemed like a standard practice from my research on the matter. I'm now working on shifting away from websites and into desktop applications. What are the best practices for data storage for desktop applications? I ask because I have noticed that most programs I use on a personal level don't appear to use a database for data storage unless its embedded in the program. (I'm not thinking of an application like a word processor where it makes sense to have data stored in individual files as defined by the user. Rather I'm thinking of something more along the lines of a calendar application which would need to store dates and event info and such where accessing that information would be much easier if stored in a database... at least as far as my experience would indicate.) Thanks for the input!

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• Linux installation on Acer Aspire One D270

  - by ronnie

  I was planning to buy Acer Aspire One D270 within a few days and as everybody installs linux on their netbook I was also planning to do that. Now, my question is how is Acer's hardware compatibility with linux and specifically in respect to the new Acer Aspire One D270. Has anybody tried installing linux on these new netbooks. It will be a great help if a D270 user can share his/her experience with linux usage. I read on some forums that there is some linux driver issue with Intel GMA 3600 and that people are not able to adjust their brightness. So, as I am a linux noob is this a major issue or not. Specs: RAM : 2Gb DDR3 Processor: Intel N2600(Cedar Trail) Graphics: Intel GMA 3600 HardDisk: 320Gb 5400 rpm

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• Graphics Driver problem, ATI Radeon HD 3200, small screen size and slows everything down.

  - by Arvind Jangid

  Regards. I am using a: 2009 Compaq Presario CQ40-415AU Notebook AMD Athlon X2 Dual core Processor 2.1 GHz 1024 MB L2 cache 3GB DDR2 RAM ATI Radeon + HD 3200 Graphics 256 MB, screen is 14 inch widescreen with resolution of 1280*800. I installed Ubuntu 12.04 LTS 32bit on my laptop. It works brilliantly until I installed graphics driver. When I installed the driver, the graphics became slow. Everything slowed down. Even the splash screen resolution changed to something like 640*480. I have liked Ubuntu since 9.10 and for the freedom it provides and its versatility, but graphics problem remains the same. I even installed Ubuntu on a 50 GB partition with 6 GB swap partition. My HDD is 320 GB. Please tell me what is wrong.

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• XNA Deferred Shading, Replace BasicEffect

  - by Alex

  I have implemented deferred shading in my XNA 4.0 project, meaning that I need all objects to start out with the same shader "RenderGBuffer.fx". How can I use a custom Content Processor to: Not load any textures by default (I want to manually do this) Use "RenderGBuffer.fx" as the default shader instead of BasicEffect Below is the progress so far public class DeferredModelProcessor : ModelProcessor { EffectMaterialContent deferredShader; public DeferredModelProcessor() { } protected override MaterialContent ConvertMaterial(MaterialContent material, ContentProcessorContext context) { deferredShader = new EffectMaterialContent(); deferredShader.Effect = new ExternalReference<EffectContent>("DeferredShading/RenderGBuffer.fx"); return context.Convert<MaterialContent, MaterialContent>(deferredShader, typeof(MaterialProcessor).Name); } }

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• samsung netbook n102sp problems with ubuntu 12.04 does not recognize intel 3150 hd high resolution

  - by foxtier494

  hello friends I have a samsung netbook n102sp atom processor 1.6, 2GB ddr3 ram and a intel 3150hd chiset chart, well the problem is the following the regular work pc has audio, lan, wi-fi reconose the video but I only lansa the resolution of 800 x 600 and I can not upload that's in the details of the computer I get into graphics (VESA: Intel ® Graphics XX) and I can not see videos because they only hear the audio and I use the vlc player I investigate intel 3150hd drivers and try to install layered but I was not please someone help me because it's an ugly work 800 x 600 and I can not see videos please, if anyone knows how to install the driver from Intel that are on the web please guide me when applied dpkg-s xserver-xorg-video-intel tells me that this driver installed ( XvMC "XVideo Motion Compensation" drivers for i810/i815 and i9xx and newer chipsets.)

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• Fan always spinning on Maverick

  - by jb

  I use Dell Studio 1555, after update to maverick my fan started spinning full speed allways. I use xserver-xorg-video-ati/radeon drivers because fglrx messes with my desktop resolution when connecting external screen. Processor is mostly idle. U use some desktop effects. On the same configuration on Lucid my fan worked slower. It eats lots of battery time :( Bug filed: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/675156 Any insights how to solve/debug it or work around it?

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• Black screen while booting, after installing installing AMD Catalyst™ 12.8 Proprietary Linux x86 Display Driver on HP pavilion dm4

  - by Megharaj

  HP Pavilion dm4 with configuration as shown below cpu intel Core i5 2.26 GHz RAM 4.0 GB Graphics processor 512MB ATI Mobility Radeon(TM) HD 5450 switchable graphics [HDMI, VGA]. I installed ubuntu 10.04 ( without AMD graphics driver) it was working fine, but when I installed AMD graphics drivers AMD Catalyst™ 12.8 Proprietary Linux x86 Display Driver, than the problem started from then When I boot I was get black screen. Than I thought to upgrade from ubuntu 10.04 to 12.04 using the bootable pen drive but was getting black screen than read on some forums that was because of the switchable graphics, than upgraded ubuntu 12.04 by setting to "nomodeset". It was working, again thought to install graphics driver AMD Catalyst™ 12.8 Proprietary Linux x86 Display Driver, again after installing this, when I boot I am getting blank scree . Can anyone help me to inatall ubuntu 12.04 along with AMD Catalyst™ 12.8 Proprietary Linux x86 Display Driver. Any help is highly appreciated.

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• Graphics on boot split into three sections

  - by a sandwhich

  I just installed 13.04 onto a new laptop because of the ease of install with the uefi bios. When I boot the system though, the screen is split into three sections each about 640x200 at the top of the screen, with the active terminal mirrored across them. Although I can login, startx fails due to something about a file. I have tried booting with vga=711 and normal nomodeset with no success. Booting the live usb I originally installed from results in the same issue. The graphics driver in the xorg.conf.something from what I can make out is set to vesa, but it could be set to some other four character value that is similar to vesa, hard to tell. How can I fix this? One thing to note, the laptop has two dedicated GT 750m's, along with the intel 4000 built into the processor. This is what it looks like, the purple box is what the grub2 menu was in before boot.

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