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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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• 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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• 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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• 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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• 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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• Not sure which Ubuntu to install (64 or 32 bit)

  - by user285993

  I want to use Ubuntu. I have Win 7 Home Premium 32-bit right now... I used to have 64 on this laptop (Toshiba Satellite c650) but my disc got a ring of death. Intel Penium CPU B940 2.00GHz, 4GB RAM Also, I'm guessing I need an image mounter such as PowerISO to install Ubuntu, if I don't have a DVD lying around that I can mount to? I'm a noob. Thanks for your help, in advance. EDIT: My question wasn't clear... can my processor and RAM handle 64-bit Ubuntu? Hell of a lot nicer than Win7

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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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• 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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• 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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• Windows 7 professional won't boot after installing ubuntu 11.10 alongside

  - by Piman3.14

  I can't boot into windows 7 professional after installing ubuntu 11.10 alongside windows as a dual boot. Windows starts to boot but then it stops during start up and "crashes". I do not have an installation or repair disc and windows is not registered as I built the computer in a class. Please help anybody who is familiar with ubuntu. Optimally I would like to just uninstall ubuntu altogether as GRUB scares me a little and Ubuntu isn't as good as windows 7 and "Bleeped" stuff up. I tried google and nothing that great came up and also I can't find a phone # to contact ubuntu/linux. :-( Specs: OS: Windows 7 professional x64, Ubuntu unity 11.10; CPU: Intel Celeron 2.6 GHz; 2 GB of RAM; Built in september or october 2011. Desktop Homebuilt PC.

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• Attempting to install Ubuntu 11.10 along side Windows 7 Professional 64bit. Installer doesn't recognize an operating system present

  - by KichigaiDave

  System Details: Asus Sabertooth 990FX motherboard AMD FX-8120 CPU 16 GB DDR3 1600 Corsair Vengance RAM (4x4) EVGA Nvidia GTX-560Ti video card 2x Dvd/cd rw dirves 1 Bluray RW drive 1 Orico USB 3.0 & eSata panel 1 Sabrent floppy bay card reader w/USB 2.0 port 760W pc power & cooling PS OCZ agility 120GB SSD (Windows 7 Professional 64bit installed in an approx 80gb partition, NTFS. There is also a "System Reserved" partition shown in disk management at 100mb in size, also NTFS) That leaves about 32GB usable free, un-partitioned space in which I hoped to install Ubuntu. However when I run the Ubuntu 11.10 AMD64 installer, it doesn't show there is even an operating system installed. It just shows the entire drive as free-unpartitioned space. Just not sure what to do here. I was thinking about using the Wubi installer, but i don't know about that. Is the performance reduction pretty drastic? Thanks,

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• Amnesia crashes

  - by Phil

  I am able to launch amnesia all the way through the menu. After I click start new game I am able to play a little bit. I hear the guy talk, then the game just closes. I installed the libtxc-dxtn-s2tc0 already as some of the similar problems I found online were fixed by doing so, but did not work for me. My graphics card is Intel GMA 4500MHD. Cpu: Intel Core Duo 2.1 Ghz. RAM: 3GB What else can I do to try and fix this? I'm pretty new to Ubuntu, I just installed it recently. What else (and how) should I post that may help you help me better?

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• suspend error on 14.04 LTS

  - by user1450663

  I've looked around and seems like various problems around suspend are wide spreaded for 14.04 release, nevertheless I haven't seen exactly my problem reported, nor my laptop model mentioned. So, the problem. When I press sleep button system seems to be going into suspend, i.e. screen goes black, it stops responding on the keyboard and wireless LEDs turn off, however the power LED doesn't go into suspend state and CPU fan also keeps spinning. But unlike the other problem described here https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1315435 when I close the lid and reopen it - system wakes up and goes back to normal locked screen state, so reboot is not needed. System details: This is a clean freshly installed Ubuntu 14.04, 32bit Laptop Dell D630 kernel 3.13.0-34-generic

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• malloc unable to assign memory + doesnt warn

  - by sraddhaj

  char *str=NULL; strsave(s,str,n+1); printf("%s",str-n); when I gdb debug this code I find that the str value is 0x0 which is null and also that my code is not catching this failed memory allocation , it doesnt execute str==NULL perror code ...Any idea void strsave(char *s,char *str,int n) { str=(char *)malloc(sizeof(char)* n); if(str==NULL) perror("failed to allocate memory"); while(*s) { *str++=*s++; } *str='\0'; }

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• Can I get some advice on graphics cards please?

  - by Victor9098

  I know that Steam for linux is on the way and have been seen a lot of games appearing in the Ubuntu Software Centre of late but my system lacks a decent graphics card and was hoping I could get some recommendations. The desktop is a Packard Bell Imedia S1800 (or Imedia D3526 UK) with the following specs; Memory: 3.8 GiB Processor: Pentium(R) Dual-Core CPU E5800 @ 3.20GHz × 2 The system lists the graphics as 'unknown', though I think its just an integrated Intel card From what I can see there is a free PCI-E x16 slot. Any advice would be great, thanks!

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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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• Super slow and laggy?

  - by Mystogan

  I'm a native Windows user, running 7 Home Premium atm. In the past I installed Ubuntu 10 on my netbook I believe, but was a bit 'scared' by it. Anyways, I made a partition on my desktop pc, 100gb 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: - 1tb HDD - 8gb ddr3 ram - ATI Radeon 4890 videocard (1gb) - AMD Phenom 2 x4 black 3,2ghz CPU(64 bits) Thanks in advantage!

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• Problems while installing Ubuntu 12.04 64 & 32 bits from LiveCd

  - by user76104

  I am trying to install Ubuntu on my new pc but I am encountering problems. When I boot from the installation CD, everything runs fine until the "window" when the user has to decide to Try Ubuntu or Install it in the machine. Well that "window" appears in blank, and my mouse and keyboard behaves really slow. I can't do anything , so i have to shut it down by pressing power button. The specification of my pc are this Motherboard: Gigabyte ex58 ud7 CPU: i7 950 HD: Western digital caviar black Int. memory: 6gb memory corsair Graphics: evga gtx580 I really need to install Ubuntu or another Linux distribution, i am using de seismic Unix program {Edit : Guess it is this} on my laptop. I hope someone can help me.

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• How can I find out how much memory an object (rather the instance of an object) of a C++ class consu

  - 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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• 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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• What is the primary use of Vertex Buffer Objects?

  - by sensae

  From what I've read, it seems VBOs are purely for performance. I'm working on a very rudimentary learning project in lwjgl and I'm just trying to figure out what more advanced features of the library I should be delving into, and what their use is. My understanding is that VBOs allow a person to keep vertexes in VRAM while they aren't currently being drawn in a scene. In my case, I'm just drawing quads and performance probably isn't a concern at all, but I'm trying to piece together what's happening under the hood. If I'm drawing quads directly, I'm drawing from the CPU memory, correct? Also, if I'm not doing any checks for visibility, does that mean I'm rendering absolutely everything in the "scene", regardless of whether its in view? Are VBOs a way to store objects and only render what's needed?

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• Is there any way to determine what type of memory the segments returned by VirtualQuery() are?

  - by bdbaddog

  Greetings, I'm able to walk a processes memory map using logic like this: MEMORY_BASIC_INFORMATION mbi; void *lpAddress=(void*)0; while (VirtualQuery(lpAddress,&mbi,sizeof(mbi))) { fprintf(fptr,"Mem base:%-10x start:%-10x Size:%-10x Type:%-10x State:%-10x\n", mbi.AllocationBase, mbi.BaseAddress, mbi.RegionSize, mbi.Type,mbi.State); lpAddress=(void *)((unsigned int)mbi.BaseAddress + (unsigned int)mbi.RegionSize); } I'd like to know if a given segment is used for static allocation, stack, and/or heap and/or other? Is there any way to determine that?

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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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• L'Unreal Engine 3 fonctionne sur Windows 8 RT, le moteur d'Epic Games tente de prendre des parts de marché à Unity

  L'Unreal Engine 3 fonctionne sur Windows 8 RT Une réponse logique de la part de Epic Games, face à la récente annonce de Unity. Après l'annonce du support de Windows 8 et Windows Phone 8 par Unity 3D, NVIDIA propose une vidéo montrant la démo porte-étendard pour les plateformes mobiles : Epic Citadel, de l'Unreal Engine 3. Elle fonctionne sur la tablette ASUS Vivo Tab RT, intégrant un NVIDIA Tegra. Pour rappel, ce processeur basé sur l'architecture ARM, combine CPU et GPU sur une même puce. Un des points ...

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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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