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• Trouble with 12.10 lag

  - by Brennan

  Well basicly lately I have been having lag problems with 12.10. I will post my specs, but before the update to 12.10, it said that I had intel graphics. Now it says I have Gallium. My specs: *Memory: 3.9 GiB *Processor: Pentium(R) Dual-Core CPU E5500 @ 2.80GHz × 2 *Graphics: Gallium 0.4 on llvmpipe (LLVM 3.2, 128 bits) (used to say intel graphics) *OS Type: 32-bit *Disk: 486.1 GB The output of the command sudo apt-cache check is this: E: Invalid operation check The output of the command sudo lspci -nnk | grep -A5 VGA is this: 00:02.0 VGA compatible controller [0300]: Intel Corporation 4 Series Chipset Integrated Graphics Controller [8086:2e32] (rev 03) Subsystem: ASUSTeK Computer Inc. Device [1043:836d] Kernel driver in use: i915 00:1b.0 Audio device [0403]: Intel Corporation NM10/ICH7 Family High Definition Audio Controller [8086:27d8] (rev 01) Subsystem: ASUSTeK Computer Inc. Device [1043:8445] Kernel driver in use: snd_hda_intel

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• Beginner: How to Make Explorer Always Show the Full Path in Windows 8

  - by Taylor Gibb

  In older versions of Windows the Title Bar used to display your current location in the file system. In Windows 8 this is not the default behavior, however, you can enable it if you wish to. Display the Full Path in the Windows Explorer Title Bar Press the Windows + E keyboard combination to open Windows Explorer and then switch over to the View tab. On the right-hand side click on options and then select Change folder and search options from the drop-down. When the Folder Options dialog opens, switch over to the View options. Here you will need to tick the Display the full path in the title bar check box. That’s all there is to it. How To Switch Webmail Providers Without Losing All Your Email How To Force Windows Applications to Use a Specific CPU HTG Explains: Is UPnP a Security Risk?

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• Alternative to Firefox's Tab Groups feature for Chromium/Chrome

  - by Halkinn

  Firefox keeps crashing the whole time on my Lubuntu 12.04 since version 12, I don't know why, I am running it on a Pentium IV desktop so might be CPU shortage, however I use the same set of extensions and configurations that I have on Windows' Firefox and it rarely crashes, runs smoothly and besides on Windows it can handle much more tabs opened before some freeze actually happens. Chromium is working better so far on Lubuntu, but I really do miss the Tab Groups Firefox feature, which is great to group tabs and organize them, it really is a boost on my productivity. Are you aware of any add-on which is similar for Chrome/Chromium? I've searched around on Chrome's Web Store but no luck at the moment.

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• Partitions and cdrom are not mounted, and the bars are missing in Ubuntu 12.04

  - by nuit

  Provide my spec and sorry for my poor English first. MB: Gigabyte G31M-S2L (bios ver. F9) CPU: intel E5200 2G RAM HD1: WD 160G with 2 partitions (partition 1:60G, NTFS, win xp; partition 2:100G, NTFS) HD2: WD 320G with 2 partitions (partition 3:220G, NTFS; partition 4:100G, ext4, Ubuntu) Recently, I tried to install Ubuntu 12.04 Beta 2 on my desktop PC (on partition 4). At the beginning, everything looked great including the auto-mounting of partitions 1~3 and the unity (3D). However, after I deleted and re-allocated the partitions on HD2 and re-installed Ubuntu on partition 4, the partitions 1~3 are no longer auto-mounted when I logged in the desktop (and even the inserted cdrom would not be mounted either), and the launch bar and menu bar in unity (3D) are missing. The configurations during these two installations are all the same as default. Are there any possible reasons or solutions for this issue? Thank you in advance!

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• What is a good method for coloring textures based on a palette in XNA?

  - by Bob

  I've been trying to work on a game with the look of an 8-bit game using XNA, specifically using the NES as a guide. The NES has a very specific palette and each sprite can use up to 4 colors from that palette. How could I emulate this? The current way I accomplish this is I have a texture with defined values which act as indexes to an array of colors I pass to the GPU. I imagine there must be a better way than this, but maybe this is the best way? I don't want to simply make sure I draw every sprite with the right colors because I want to be able to dynamically alter the palette. I'd also prefer not to alter the texture directly using the CPU.

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• problems with graphic performance in Ubuntu 12.04

  - by Falk

  in advance: my English is not perfect ;) processor: Intel® Core™2 Duo CPU E8500 @ 3.16GHz × 2 memory: 3,9 GiB graphics: GeForce GTX 460 Ubuntu 12.04 32-Bit fresh installed (previously 11.10 32-Bit) driver: NVIDIAs accelerated Driver (Version current-updates) probelm: In Ubuntu 12.04 I have problems with the performance of the graphics (games for example: Volley Brwawl, Neverball, Beep and Minecraft), and effects of windows (always at minimize, maximize...) There are laggs at animations, and the laggs in games are extremely annoying. Problems occur only in Ubuntu 12.04, everything was good in 11.10. No Problems with YouTube videos, HD videos. Is there a solution? BBecause I have found nothing here in the Forum and on Google. Or is an update coming soonfor driver or whatever? (This Bug is already registered in Launchpad.) Thank you!

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• Design a Distributed System

  - by Bonton255

  I am preparing for an interview on Distributed Systems. I have gone through a lot of text and understand the basics of the area. However, I need some examples of discussions on designing a distributed system given a scenario. For example, if I were to design a distributed system to calculate if a number N is primary or not, what will the be design of the system, what will be the impact of network latency, CPU performance, node failure, addition of nodes, time synchronization etc. If you guys could present your in-depth thoughts on this example, or point me to some similar discussion, that would be really helpful.

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• How do I create a 12.04 LiveUSB for a non-PAE machine?

  - by DrSkylaser

  I'm trying to create a dual-boot laptop with Ubuntu 12.04 and some flavor of Windows (TBD). To do that, I need to do some work on partitions & install 12.04. To do that, I need to create a bootable USB that will work with my non-PAE-capable CPU. Someone pointed me to a mini.iso that was allegedly non-PAE-friendly, but it gave me the same error as the straightup 12.04 desktop ISO. What version do I actually need? (This isn't going to be a virtual machine--I don't think the laptop has the RAM to handle that happily--so enabling PAE in the virtual machineware doesn't help me.)

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• how to install/compile CORSIKA/FLUKA for Ubuntu x32 12.04?

  - by Pantea Davoudifar

  I want to use some programs (CORSIKA/FLUKA) which are essentially designed for 32 bit systems. so I installed Ubuntu 12.04 32 bit on my system (Intel® Core™ i7-2700K CPU @ 3.50GHz × 8). Before this I had installed Ubuntu 9.10 (32-bit) on an older system and installed g77 from hardy repositories, compiled those programs without any problem. But this time when changing the repositories, g77 could not be installed even i removed all the things that i thought make this installation impossible, for example I need gcc-3.4 and removed all newer versions and tried to install them from hardy repositories. but the problem is that, whenever I have g77, corsika does not compile, and whenever I remove it, fluka does not compile, and also i received a error messages like this: crt1.o not found in /usr/bin/lb. In fact these .o files does not exist on my system user/bin/lb I have no directory lb there? I do not know how to link it? Or do i need to reinstall everything?

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• Upgrade to 12.04, nothing in dash, no date&time

  - by Nicolas

  I've upgraded from ubuntu netbook remix something to 12.04 lts, and I've got two issues. (Got an Asus eeePc 32bits, Intel 945GME x86/MMX/SSE2 and Intel Atom CPU N270 @ 1.6Ghz x2) Nothing in the dash. Only the "home" tab, other tabs are missing. No search result whatsoever. Missing elements in the system panel, privacy and date&time. No date&time on the right corner either. I've tried to reset unity with the terminal but the process was a whole mess full of errors. It did show date&time in the system panel (not on the top-right corner) while the process was going on in the terminal. But then it was such a mess (no more icons on the right corner amongst other things), and the process wouldn't complete: so I had to reboot the computer and get unity as before, still no date&time and privacy. Thanks for any help. nic

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• Grid based collision - How many cells?

  - by Fibericon

  The game I'm creating is a bullet hell game, so there can be quite a few objects on the screen at any given time. It probably maxes out at about 40 enemies and 200 or so bullets. That being said, I'm splitting up the playing field into a grid for my collision checking. Right now, it's only 8 cells. How many would be optimal? I'm worried that if I use too many, I'll be wasting CPU power. My main concern is processing power, to make the game run smoothly. RAM is not a big concern for me.

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• HTG Explains: What is DNS?

  - by Chris Hoffman

  Did you know you could be connected to facebook.com – and see facebook.com in your web browser’s address bar – while not actually being connected to Facebook’s real website? To understand why, you’ll need to know a bit about DNS. DNS underpins the world wide web we use every day. It works transparently in the background, converting human-readable website names into computer-readable numerical IP addresses. Image Credit: Jemimus on Flickr How To Switch Webmail Providers Without Losing All Your Email How To Force Windows Applications to Use a Specific CPU HTG Explains: Is UPnP a Security Risk?

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• PHP 5.2 et 5.3 : un bug étrange rend les attaques par Déni de Service enfantines sous Windows et Linux

  PHP : un bug étrange rendrait enfantines les attaques par Déni de Service Il toucherait les versions 5.2 et 5.3 du langage sous Windows et Linux Un bug critique vient d'être découvert dans les branches 5.2 et 5.3 de PHP, le langage de programmation Web parmi les plus populaires. Ce bug est provoqué par certaines valeurs de nombres à virgule flottante ayant un nombre considérable de décimaux. Leurs calculs ou évaluations en PHP provoqueraient une boucle infinie occupant 100% des ressources du CPU. L'exécution de la ligne de code suivante, ou même son équivalent sans la notation scientifique (avec 324 décimales), provoquerait donc le plantage de la machine, et ce sous...

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• Flash vs. l'HTML5 : lequel est le plus performant ? Aucun, selon un expert américain

  Mise à jour du 10.03.2010 par Katleen Flash vs. l'HTML5 : lequel est le plus performant ? Aucun, selon un expert américain L'utilité de Flash est âprement discutée ces dernières semaines, suite au refus catégorique de Steve Jobs d'implémenter cette technologie dans ses derniers produits : l'iPad et l'iPod Touch. Les fanboys d'Apple suivent leur maître et, comme lui, ils considèrent Flash comme un dévoreur de CPU nuisible pour la longévité des batteries. Flash a alors tout de la bête noire. Pourtant, de récentes études l'ont comparé à l'HTML5. Et les résultats sont?innatendus. Du moins, pour les détracteurs de Flash. Flash est en effet...

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• Coherence Query Performance in Large Clusters

  - by jpurdy

  Large clusters (measured in terms of the number of storage-enabled members participating in the largest cache services) may introduce challenges when issuing queries. There is no particular cluster size threshold for this, rather a gradually increasing tendency for issues to arise. The most obvious challenges are that a client's perceived query latency will be determined by the slowest responder (more likely to be a factor in larger clusters) as well as the fact that adding additional cache servers will not increase query throughput if the query processing is not compute-bound (which would generally be the case for most indexed queries). If the data set can take advantage of the partition affinity features of Coherence, then the application can use a PartitionedFilter to target a query to a single server (using partition affinity to ensure that all data is in a single partition). If this can not be done, then avoiding an excessive number of cache server JVMs will help, as will ensuring that each cache server has sufficient CPU resources available and is also properly configured to minimize GC pauses (the most common cause of a slow-responding cache server).

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• Nonresponsive UI starting a few days ago; no obvious resource shortage

  - by user3679

  The mouse stops and moves jerkily, and sometimes won't register clicks. Gnome stopped responding a few hours ago--everything looks fine, but no clicks on menu items do anything. I've been running Ubuntu 10.10 since it was released; 8GB RAM and a 60GB SSD. I haven't added any hardware or software recently except the Ubuntu recommended updates; the last thing was the bitcoin client a week ago. top shows 3 CPU cores free and over a gig of ram left. I don't know what else to look at.

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• Ubuntu gets slower by the day

  - by Doug

  Ive noticed that Ubuntu has been getting slower and slower to boot, launch programs, etc. I installed 12.04 about 4 months ago,now 12.10, running on a quad-core Q8300 Intel, 4GB Ram, and an 80GB WD IDE drive. For some reason (ever since 11.04), Ive noticed after installation, the speed is good. The longer I have the OS installed, every bootup gets slower and slower, launching programs get slower, frame rates change radically(onboard GF9400 gets anywhere from 60fps down to 12 in worst cases). I would think maybe the HD is the issue, however I installed 11.10 on a 160GB SATA, and the same thing occurred. Looking at system resources, I'm holding steady at 1GB memory usage (I have 4GB, but it's actually showing 3.6GB, dunno why), no swap usage, and using right around 4% on cpu currently. HD capacity is only 28% used. Has anyone else ran into this issue? I love Ubuntu to death, but using other distros other than Ubuntu, I dont have this problem.

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• FAQ: Creating a new LDOM domain

  - by Owen Allen

  I got a question about creating LDOM domains: "I have a Server Pool set up, and I need to create a secondary LDom domain on a machine in the pool. When I click on the machine, though, the 'create logical domain' command is grayed out. The machine still has available CPU threads and free RAM. What's going on?" This one has an easy answer. In a Server Pool, the Create Logical Domain action is under the pool's actions, rather than the individual machine's actions. This is because the Server Pool decides where to put the new domain based on the Server Pool's placement policy. So, in this case, you need to select the Server Pool in the Assets section, and then create the new domain from there.

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• What are the system requirements for each flavor of Ubuntu Desktop?

  - by Braiam

  I'm thinking about installing Ubuntu Desktop, but I don't know what flavor is the better for my system. What are the minimum and recommended hardware requirements? What kind of CPU? How much memory? Should I have Hardware Acceleration? What flavor should I use? This is an attempt of a canonical answer. My answers have the "official minimal requirements", the recommended are a mix of official sources and opinion based (along with the answer it's told the source). You can comment or edit if you feel that the information is obsolete or incomplete. Is a good rule of thumb that any system capable to run Windows Vista, 7, 8 x86 OS X will almost always be a lot faster with any Ubuntu flavor even if they are lower-spec than described below.

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• Unity environment way too slow in Ubuntu 13.10

  - by Santiago

  Unity and its apps open too slowly whenever I open one. It takes a while for them to appear completely. Everything works properly when the window is already open. The biggest problem is with the dash: it's SO SLOW when I'm looking for an app although I have removed some lenses. What should I do or what can I do? These issues only occur with Ubuntu 13.04 and 13.10 whereas 12.04 works AMAZNGLY but I have issues when updating a package or installing a new one, that's why I don't opt for that one. Specifications: RAM: 2GB, Processor: Intel® Atom™ CPU N2600 @ 1.60GHz × 4, Graphics card: Gallium 0.4 on llvmpipe (LLVM 3.3, 128 bits)

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• Efficient skeletal animation

  - by Will

  I am looking at adopting a skeletal animation format (as prompted here) for an RTS game. The individual representation of each model on-screen will be small but there will be lots of them! In skeletal animation e.g. MD5 files, each individual vertex can be attached to an arbitrary number of joints. How can you efficiently support this whilst doing the interpolation in GLSL? Or do engines do their animation on the CPU? Or do engines set arbitrary limits on maximum joints per vertex and invoke nop multiplies for those joints that don't use the maximum number? Are there games that use skeletal animation in an RTS-like setting thus proving that on integrated graphics cards I have nothing to worry about in going the bones route?

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• File system layout for multiple build targets

  - by Yttrill

  I am seeking some ideas for how to build and install software with some parameters. These including target OS, target platform CPU details, debugging variant, etc. Some parts of the install are shared, such as documentation and many platform independent files, others are not, such as 64 and 32 bit libraries when these are separated and not together in a multi-arch library. On big networked platforms one often has multiple computers sharing some large server space, so there is actually cause to have even Windows and Unix binaries on the same disk. My product has already fixed an install philosophy of $INSTALL_ROOT/genericname/version/ so that multiple versions can coexist. The question is: how to manage the layout of all the other stuff?

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• What's a good open source cloud computing software? [closed]

  - by boy

  In particular, the "cloud" computing that I'm referring to is: I'm going to get some Linux servers. Then I have pretty big computing tasks to do every day. So my goal is to be able to run some shell command to request an "instance" (ie, if a server has 4 CPU, then the computing software will configure that server to have 4 instances, assuming all my tasks are single thread). Ideally, then I can run the following command: ./addjobs somebatchfile where somebatch file contains one command per line ./removejobs all ./listalljobs (ie, everything is done in shell. And the "computing software" can return me the hostname that's available in some environment variable, etc) And that's all I needed. I run into OpenStack.. but it seems too complicated for this purpose (ie, it does all the Imagine sharing stuff, etc).. All I want, is something SIMPLE that manages the Linux boxes for me and I'm just going to run shell commands on them... Is there such open source software? Thanks,

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• On-board HDMI Audio

  - by TrackStar

  I have tried searching for answers to this issue but have had no luck. My HDMI display is working but I have no audio from the HDMI .There is no option for HDMI under sound preferences hardware or output. Purging and re-installing pulse audio doesn't change anything. I am using the on-board HDMI port on my motherboard, I do not have a PCI graphics card installed. CPU: i7-3770 Mobo: Asus Sabertooth z77 Kernel: 2.6.39-3-bb03 running aplay -l returns ** List of PLAYBACK Hardware Devices ** card 0: Intel [HDA Intel], device 0: ALC892 Analog [ALC892 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: Intel [HDA Intel], device 1: ALC892 Digital [ALC892 Digital] Subdevices: 1/1 Subdevice #0: subdevice #0 Seems as if the system doesn't even recognize the possibilty of HDMI audio output. Any ideas?

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• Which parallel pattern to use?

  - by Wim Van Houts

  I need to write a server application that fetches mails from different mail servers/mailboxes and then needs to process/analyze these mails. Traditionally, I would do this multi-threaded, launching a thread for fetching mails (or maybe one per mailbox) and then process the mails. We are moving more and more to servers where we have 8+ cores, so I would like to make use of these cores as much as possible (and not use 1 at 100% and leave the seven others untouched). So conceptually, as an example, it would be nice that I could write the application in such a way that two cores are "continuously" fetching emails and four cores are "continuously" processing/analyzing the emails (since processing and analyzing mails is more CPU intensive than fetching mails). This seems like a good concept, but after studying some parallel patterns, I'm not really sure how this is best implemented. None of the patterns really fit. I'm working in VS2012, native C++, but I guess from a design point of view this does not really matter and just some pointers on how to organize this would be great!

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