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• Problem with the screen resolution on Ubuntu 12.04

  - by sveinn

  I just installed ubuntu on my laptop. The screen resolution is stuck in 1024x768. The screen is made for 1280x800. When I run xrandr I get: xrandr: Failed to get size of gamma for output default Screen 0: minimum 800 x 600, current 1024 x 768, maximum 1024 x 768 default connected 1024x768+0+0 0mm x 0mm 1024x768 61.0* 800x600 61.0 1280x800 isn't offered and I get gamma size error. I was going to look into the Xorg.conf file but I couldn't locate it. 1280x800 was displayed in Windows 7 and I think it is being displayed in Grub before ubuntu starts also. Here are some details about my computer: CPU Intel atom D2500 1.86GHz Chipset Intel 945GSE+ICH7M LCD 14" TFT 16:9 Resolution ratio 1280*800 Video Card Intel integrated GMA950 Does anyone know how to fix this?

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• What techniques can I use to render very large numbers of objects more efficiently in OpenGL?

  - by Luke

  You can think of my application as drawing a very large ball-and-stick diagram (or graph). At times, this graph can get very large, where the number of elements even outnumbers the pixels on the screen. Currently I am simply passing all of my textures (as GL_POINTS) and lines to the graphics card using VBO's. When the number of elements outnumbers the number of pixels, is this the most efficient way to do this? Or should I do some calculations on the CPU side before handing everything over to the GPU? If it matters, I do use GL_DEPTH_TEST and GL_ALPHA_TEST. I do some alpha blending, but probably not enough to make a huge performance difference. My scene can be static at times, but the user has control over a typical arc-ball camera and can pan, rotate, or zoom. It is during these operations that performance degradation is noticeable.

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• Ubuntu 12.10 64 bit Slow

  - by Patrick Skiba

  I am new to linux and was wondering why launching applications is so slow. I've tried both Ubuntu 12.10 64 bit and Ubuntu 12.04 LTS 64 bit Computer Specs: Toshiba Satellite p755 CPU: Intel core i7-2670QM @2.20GHz Ram: 8 GB Using integrated intel hd 3000 graphics When I install the first thing I do is update, which takes about an hour or so. I would assume I'd be good after that, but when launching things like the firefox, system settings, thunderbird it takes a much much longer time than on Windows 7. Please help me.

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• Analyzing I/O Characteristics and Sizing Storage Systems for SQL Server Database Applications

  Understanding how to analyze the characteristics of I/O patterns in the Microsoft® SQL Server® data management software and how they relate to a physical storage configuration is useful in determining deployment requirements for any given workload. A well-performing I/O subsystem is a critical component of any SQL Server application. I/O subsystems should be sized in the same manner as other hardware components such as memory and CPU. As workloads increase it is common to increase the number of CPUs and increase the amount of memory. Increasing disk resources is often necessary to achieve the right performance, even if there is already enough capacity to hold the data. Too many SQL Servers to keep up with?Download a free trial of SQL Response to monitor your SQL Servers in just one intuitive interface."The monitoringin SQL Response is excellent." Mike Towery.

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• Admin user runs slower than the guest account

  - by Mykid

  My user is the Admin, it runs fine, not bugs or anything, I used Ubuntu Tweak for a few things like logging options and the sidebar and Unity Tweak for hotcornes and minimize window and that's about it. My second user (for my mother) is faster. I don't know how or why. Let me know what I need to enter on the terminal to give you more info, if you think it's normal also let me know. I have a Compaq Presario CQ56, Ubuntu 14.04 64bit dual boot with Windows 7 Premium, 3GB of ram DDR3, Celeron(R) Dual-Core CPU T3500 @ 2.10GHz × 2.

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• What job is most similar to being a DBA?

  - by fatherjack

  As long as I have worked with computers, and that's a length of time that may be easier on the eye when converted to dog-years, computers have been compared with cars. I guess the car was the most complicated thing in our lives until the PC arrived. We had plenty of time to get used to the car and how it worked, or not, and how it gradually became more complex. We can compare backups to spare tyres, CPU cores to pistons ("the more you blow, the faster you go"), and so on. I am not aware...(read more)

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• What sort of things can cause a whole system to appear to hang for 100s-1000s of milliseconds?

  - by Ogapo

  I am working on a Windows game and while rendering, some computers will experience intermittent pauses ("hitches" for lack of a better term). When profiled they appear in seemingly random places in the code. Eventually I noticed that it wasn't just my process that was affected, but (seemingly) every process on the system. All of the threads in my application hitch at once. The CPU utilization drops during these hitches and it appears as if most processes make no progress. This leads me to believe this may be an Operating System or Driver issue, but it only occurs while playing the game (and only on some systems). What sort of operations might the operating system be doing that would require the kernel to pause all user threads and block. Some kind of I/O? At first I thought of paging but my impression is that would only affect a single process, no? Some systems in use: Windows, DirectX (3d), nVidia cards (unknown if replicates on ATI), using overlapped io for streaming

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• Baby's first big CPP project - please help [closed]

  - by jamesson

  So, I need to do a few things to the code here; http://64.90.55.88/SynapseSource-Win.zip What I need to do 1)remove the opengl output window 2)Make it work with latest openni (http://75.98.78.94/default.aspx) - as far as I could tell it only works with a specific older version 3)Improve ram and cpu usage (assuming I don't get what I need from the first two changes) 4)Eventually rebuild it as an object in this sdk; http://cycling74.com/products/sdk/ I tried going through the documentation, but "the needle could not penetrate", alas. For example, I am still unclear about some basic things; a) what are the relative responsibilities of nite vs openni? b) which xml files are always used when the app launches, and what is their format? Many thanks in advance Joe Stavitsky

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• nicstat update - version 1.92

  - by user12608033

  Another minor nicstat release is now available. Changes for Version 1.92, October 2012 Common Added "-M" option to change throughput statistics to Mbps (Megabits per second). Suggestion from Darren Todd. Fixed bugs with printing extended parseable format (-xp) Fixed man page's description of extended parseable output. Solaris Fixed memory leak associated with g_getif_list Add 2nd argument to dladm_open() for Solaris 11.1 Modify nicstat.sh to handle Solaris 11.1 Linux Modify nicstat.sh to see "x86_64" cputype as "i386". All Linux binaries are built as 32-bit, so we do not need to differentiate these two cpu types. Availability nicstat source and binaries are available from sourceforge. History For more history on nicstat, see my earlier entry

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• How do I duplicate a Box2d simulation, mid-simulation?

  - by Whyte

  I want to serialize the state mid-game, send it over the network to an identical computer (same CPU, same OS, same binary), load it there, and have the two games run in tandem doing the exact same simulation, without one of them drifting off and going haywire. In short: I want pop-in, pop-out networking support on my HIGHLY physics-intensive game, where sending object coordinates every few seconds is impossible, due to having thousands of objects, and many clients. I tried this with Box2D, and saving an object's location/velocity/etc wasn't enough... there's internal state that's not accessible through any public methods. My current workaround is to force EVERY client to save its entire worldstate and reload it from scratch, whenever a new player connects... but this is obviously bad practice, because it hangs the game for everyone whenever someone new connects. However, it works, with zero desynchronization. So, anyone know of any other techniques that can help me? Or should I just kiss my project goodbye?

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• Only can move the pointer after upgrading

  - by Mystogan

  I made a partition on my desktop pc, 100 GB and installed Ubuntu 12.10 on it. It was pretty slow first thought it had to install updates or something, so I rebooted it. Now after the login it looks like everything freezes, I can move my mouse only, but that's it! I can see my desktop and launcher, but the task bar doesn't display time and misc system info, only a black bar, I downloaded the Android SDK pack and installed vlc media player before I rebooted. My computer info: 1 TB HDD 8 GB ddr3 RAM ATI Radeon 4890 videocard (1 GB) AMD Phenom 2 x4 black 3, 2ghz CPU (64 bits)

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• What is the result of "new int[ 0 ]"? [closed]

  - by ArunSaha

  Possible Duplicates: What does zero-sized array allocation do/mean? C++ new int[0] — will it allocate memory? int * p; p = new int[ 0 ]; What is the expected outcome when new is called for zero number of elements? Is the outcome defined or undefined? Further, is it okay to call delete [] p; on that pointer? What is the intuition/analogy to this situation of pointer to an array of zero elements? Thanks in advance. Regards, Arun

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• Issues with HP Mini 110-1125NR

  - by Guga Figueiredo

  Just finished installing Ubuntu 12.04 Precise Pangolin on my HP Mini 110-1125NR and im having small, but rather irritating issues. I installed it over the Windows 7 (starter) which came with the netbook. Firstly, it will only boot from the USB flashdisk. If i try to boot from the hardrive, it goes to a black screen. Second, built-in wireless wont activate. system says its enabled and on, but the light indicator is still orange (as if its off), and i cant get a signal from my home wi-fi I havent found any solved threads for inspiration, and mos of them are pretty old (1 year +) so i thought of giving a try to see if any of you guys System is: HP Mini 110-1100 1gb memory Intel Atom CPU N270 @ 1.60GHz x 2 Os - Precise Pangolin - Ubuntu 12.04 160gb Hard disk If any of you are aware of the solutions of my issues it'd be awesome Thanks in advance for any help!

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• windows are moving slowly on ubuntu 11.10

  - by myildirim

  Video Card : ATI Mobility Radeon HD 3650 Therefore my video card ATI when i check system info Driver : VESA: M86 Experience : Fallback i checked compiz config manager and disable all effects insipite of this windows are moving slowly.It does not for all windows,for example when i use google chrome and scrool up/down there is no effect but when i move window to another position it moves slowly but when i use pdf reader when i scrool up or down it moves slowly.How can i solve this ? i use core 2 duo intel cpu and run ubuntu 11.10. Edit : The Solution : Upgrade kernel and then update all graphic card drivers.Now there is no problem .

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• Ubuntu server and services

  - by Vicenç Gascó

  I've been using Linux+Plesk Virtual Server as a web server for a while, but I want to give a try on doing it manually, so my question is: I'll have a server which is: 80GB HDD, 4GB RAM, 1TB Bandwith, 1 Dedicated IP. And I use the following things on my Virtual nowadays: Mail server DNS server Apache + PHP 5.5 + MySQL FTP SSH My question is, without Plesk, can I achieve manually all those functionalities -know that I am not a terminal pro-, actually upgrading some of them to look like that with ubuntu server?: Mail server (with a nice webmail included) DNS server nginx + PHP 5.5 + MySQL + MongoDB FTP + SFTP SSH GIT Server Which ubuntu server should I chose? [EDIT] I almost forgot, I'd like to know how much Bandwith and CPU is using each of my webapps (one per domain usually), and the overall (not just from the webapps, but also mail, dns, etc...) ... usually Plesk does that for me, and I don't know how to measure that without it!

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• What do I need to do when installing old version of ubuntu on new arch platform?

  - by Blangero

  I got a board with aptio cpu which is said to be of new platform and may have driver problems while using old version of ubuntu, and it do have. After installing my customized Live ubuntu server with X(the system runs as a liveCD), X starts but failed to get right resolution. If I run ubiquity in the live system to install the system to my disk, I can't start X and the whole console was a mess.Tried connect from ssh and upgrade, failed to solve the problem. Install ubuntu 12.04.2 desktop, at bootup the text was a mess, X starts and still could not get the right resolution. Install ubuntu 14.04 server, at bootup the text was also a mess, but it turned clear and the resolution is right. So what else do I need to provide? CPUInfo ? lspci -nn | grep VGA ? anything else? And what's the problem? What can I do to support the newest arch in my customized system? Thanks

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• Efficiency: what block size of kernel-mode memory allocations?

  - by Robert

  I need a big, driver-internal memory buffer with several tens of megabytes (non-paged, since accessed at dispatcher level). Since I think that allocating chunks of non-continuous memory will more likely succeed than allocating one single continuous memory block (especially when memory becomes fragmented) I want to implement that memory buffer as a linked list of memory blocks. What size should the blocks have to efficiently load the memory pages? (read: not to waste any page space) A multiple of 4096? (equally to the page size of the OS) A multiple of 4000? (not to waste another page for OS-internal memory allocation information) Another size? Target platform is Windows NT = 5.1 (XP and above) Target architectures are x86 and amd64 (not Itanium)

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• How can I find out how much memory an instance of a C++ class consumes?

  - by Shadow

  Hi, I am developing a Graph-class, based on boost-graph-library. A Graph-object contains a boost-graph, so to say an adjacency_list, and a map. When monitoring the total memory usage of my program, it consumes quite a lot (checked with pmap). Now, I would like to know, how much of the memory is exactly consumed by a filled object of this Graph-class? With filled I mean when the adjacency_list is full of vertices and edges. I found out, that using sizeof() doesn't bring me far. Using valgrind is also not an alternative as there is quite some memory allocation done previously and this makes the usage of valgrind impractical for this purpose. I'm also not interested in what other parts of the program cost in memory, I want to focus on one single object. Thank you.

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• Getting Started with 12.04 LTS Problems

  - by mark

  Okay previously I used ubuntu 10.04 in Desktops and Loved it! I bought a newer Toshiba Satellite with an i7 CPU, 8GB Ram, 1TB HD, first thing I tried to do was install Ubuntu 9 on it then I found out it was no longer Supported. (I gave my 10.04 disk away) So I tried installing Windows 7 and experienced SO MANY problems, I am going back to try 12.04. Starting all over again. After installing 12.04 Wireless was Detected yet said it was Disabled by a Hardware Switch. Went read through the Message Boards found Solution which was Sudo rf Kill All. Okay all excited I would finally get my Ubuntu to finally work I rushed back to my laptop from the internet cafe, and went looking for the TERMINAL input on my Ubuntu 12.04, and I cannot find the Terminal. If I can't find the TERMINAL how Can I enter any Sudo Stuff? So I guess the first question is Where is the Terminal Located in 12.04? Thank you.

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• How can I run a complete application from RAM?

  - by pico

  When I do some stuff in background (unpacking, compiling, backup, etc.) my hdd is under load and for example, Firefox and Chromium take very long to start and react very slow. While my hdd is under load I have still plenty of free RAM and free CPU. How can I copy the whole Firefox or Chromium including all dependencies into RAM? I don't care about persistence, I just want to view some websites, videos, etc. There are instructions putting the cache into /dev/shm, but that didn't speed up so much. Getting the profile into the RAM drive might also be easy... But how to get the binaries with all dependencies into RAM?

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• How can I find out how much memory an object of a C++ class consumes?

  - by Shadow

  Hi, I am developing a Graph-class, based on boost-graph-library. A Graph-object contains a boost-graph, so to say an adjacency_list, and a map. When monitoring the total memory usage of my program, it consumes quite a lot (checked with pmap). Now, I would like to know, how much of the memory is exactly consumed by a filled object of this Graph-class? With filled I mean when the adjacency_list is full of vertices and edges. I found out, that using sizeof() doesn't bring me far. Using valgrind is also not an alternative as there is quite some memory allocation done previously and this makes the usage of valgrind impractical for this purpose. I'm also not interested in what other parts of the program cost in memory, I want to focus on one single object. Thank you.

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• Google active la réponse et l'update partielle dans son Data protocol, pour faciliter la mise à jour

  Google active la réponse partielle et l'update partielle dans son Data protocol, pour faciliter la mise à jour de ses APIs Dans le but de booster la rapidité de ses APIs, Google Data Protocol (qui permet aux développeurs d'écrire des applications liées avec les données contenues dans les produits Google) s'est vu attribué deux nouvelles fonctionnalités cette semaine, au stade expérimental : la réponse partielle, et l'update partielle. Conjointement, ces deux fonctions "peuvent significativement réduire les ressources consommées par le réseau, la mémoire et le CPU" dont on a besoin pour travailler avec les APIs de Google. Pour expliquer le rôle de la réponse partielle, l'équipe du Google Data Protocol donne ...

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• How to Determine VPS Hosting Resources Needs for my upcoming Wordpress blog? How much resources should i purchase? [closed]

  - by Ishwar dixit

  Possible Duplicate: How to find web hosting that meets my requirements? Decided to purchase VPS hosting but Getting confused on amount of Resources i need? Wordpress will be used as platform, The blog i want to setup is assumed to have a traffic between 20k - 25k Visits per day with a rate of 5 pageviews per visit... there is No Download Facility provided...the content of the blog will be Text, Images & videos (will be used rarely)... The main question is? For the above requirement: How much RAM will be enough? How much CPU usage i will need? How much Bandwidth will be enough? How much Disk Space? Any other Requirement? Thanx in Advance..

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• Custom deleters for std::shared_ptrs

  - by Kristian D'Amato

  Is it possible to use a custom deleter after creating a std::shared_ptr without using new? My problem is that object creation is handled by a factory class and its constructors & destructors are protected, which gives a compile error, and I don't want to use new because of its drawbacks. To elaborate: I prefer to create shared pointers like this, which doesn't let you set a custom deleter (I think): auto sp1 = make_shared<Song>(L"The Beatles", L"Im Happy Just to Dance With You"); Or I can create them like this, which does let met set a deleter through an argument: auto sp2(new Song, MyDeleterFunc); But the second one uses new, which AFAIK isn't as efficient as the top sort of allocation. Maybe this is clearer: is it possible to get the benefits of make_shared<> as well as a custom deleter? Would that mean having to write an allocator?

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• how to get stl map to construct/destruct inserted object only once.

  - by Alberto Toglia

  I have found a very prejudicial fact about stl maps. For some reason I cant get objects being inserted in the map to get constructed/destructed only once. Example: struct MyObject{ MyObject(){ cout << "constructor" << endl; } ~MyObject(){ cout << "destructor" << endl; } }; int main() { std::map<int, MyObject> myObjectsMap; myObjectsMap[0] = MyObject(); return 0; } returns: constructor destructor destructor constructor destructor If I do: typedef std::pair<int, MyObject> MyObjectPair; myObjectsMap.insert( MyObjectPair(0,MyObject())); returns: constructor destructor destructor destructor I'm inserting Objects responsible for their own memory allocation, so when destructed they'll clean themselves up, being destructed several times is causing me some trouble.

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