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  • ASP.NET: Serializing and deserializing JSON objects

    - by DigiMortal
    ASP.NET offers very easy way to serialize objects to JSON format. Also it is easy to deserialize JSON objects using same library. In this posting I will show you how to serialize and deserialize JSON objects in ASP.NET. All required classes are located in System.Servicemodel.Web assembly. There is namespace called System.Runtime.Serialization.Json for JSON serializer. To serialize object to stream we can use the following code. var serializer = new DataContractJsonSerializer(typeof(MyClass)); serializer.WriteObject(myStream, myObject); To deserialize object from stream we can use the following code. CopyStream() is practically same as my Stream.CopyTo() extension method. var serializer = new DataContractJsonSerializer(typeof(MyClass));   using(var stream = response.GetResponseStream()) using (var ms = new MemoryStream()) {     CopyStream(stream, ms);     results = serializer.ReadObject(ms) as MyClass; } Why I copied data from response stream to memory stream? Point is simple – serializer uses some stream features that are not supported by response stream. Using memory stream we can deserialize object that came from web.

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  • Lubuntu 12.04 on Acer laptop boots to blank blue screen

    - by WGCman
    My previous question on this was closed, but I am posting it again as the solution which my son eventually found may assist other users of the forum, or someone may be able to tweak the solution to improve the performance. Having installed Kubuntu 12.04.01 from a live USB onto my desktop, I wanted to do the same on my laptop, an Acer Aspire 1362 Laptop, which has 256MB RAM (actually 512 "on the box", but a good deal can be borrowed by the graphics!). I found Kubuntu wouldn't run on so little memory but downloaded: Lubuntu-12.04-alternate-i386.iso, which I understood was light enough to go. The laptop has one internal 40GB Toshiba hard drive divided into 3 partitions: C,19GB with Windows XP, Windows program files and some data, D, 19GB mostly data, and a small 2GB partition with some Acer software, which XP can't normally “see”. I transferred most of the contents of D to a memory stick, leaving 16GB free for Lubuntu. I did not want to dump XP yet, though it is painfully slow. I installed Lubuntu from then USB stick, accepting the default answers to most of the questions. The D: partition was further partitioned into a 500MB boot partition, 10GB for Linux, 2GB Swap and 6GB for data shareable between Linux and Windows. I had no error messages during installation, rebooted, was offered the choice of Ubuntu or XP, and selected the former. After a few minutes, I get a dark blue screen announcing Lubuntu with five dots underneath which lighten in turn. Eventually the lights stopped, and whatever I try the screen remains blank apart from “Lubuntu” I tried several solutions suggested on the forum for “identical” questions but without success.

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  • the OpenJDK group at Oracle is growing

    - by john.rose
    p.p1 {margin: 0.0px 0.0px 12.0px 0.0px; font: 12.0px Times} span.s1 {text-decoration: underline ; color: #0000ee} The OpenJDK software development team at Oracle is hiring. To get an idea of what we’re looking for, go to the Oracle recruitment portal and enter the Keywords “Java Platform Group” and the Location Keywords “Santa Clara”.  (We are a global engineering group based in Santa Clara.)  It’s pretty obvious what we are working on; just dive into a public OpenJDK repository or OpenJDK mailing list. Here is a typical job description from the current crop of requisitions: The Java Platform group is looking for an experienced, passionate and highly-motivated Software Engineer to join our world class development effort. Our team is responsible for delivering the Java Virtual Machine that is used by millions of developers. We are looking for a development engineer with a strong technical background and thorough understanding of the Java Virtual Machine, Java execution runtime, classloading, garbage collection, JIT compiler, serviceability and a desire to drive innovations. As a member of the software engineering division, you will take an active role in the definition and evolution of standard practices and procedures. You will be responsible for defining and developing software for tasks associated with the developing, designing and debugging of software applications or operating systems. Work is non-routine and very complex, involving the application of advanced technical/business skills in area of specialization. Leading contributor individually and as a team member, providing direction and mentoring to others. BS or MS degree or equivalent experience relevant to functional area. 7 years of software engineering or related experience.

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  • Honing Performance Tuning Skills on MySQL

    - by Antoinette O'Sullivan
    Get hands-on experience with techniques for tuning a MySQL Server with the Authorized MySQL Performance Tuning course.  This course is designed for database administrators, database developers and system administrators who are responsible for managing, optimizing, and tuning a MySQL Server. You can follow this live instructor led training: From your desk. Choose from among the 800+ events on the live-virtual training schedule. In a classroom. A selection of events/locations listed below  Location  Date  Delivery Language  Prague, Czech Republic  1 October 2012  Czech  Warsaw, Poland  9 July 2012  Polish  London, UK  19 November 2012  English  Rome, Italy  23 October 2012  Italian  Lisbon, Portugal  17 September 2012  European Portugese  Aix-en-Provence, France  4 September 2012  French  Strasbourg, France  16 October 2012  French  Nieuwegein, Netherlands  3 September 2012  Dutch  Madrid, Spain  6 August 2012  Spanish  Mechelen, Belgium  1 October 2012  English  Riga, Latvia  10 December 2012  Latvian  Petaling Jaya, Malaysia  10 September 2012  English  Edmonton, Canada  27 August 2012  English  Vancouver, Canada  27 August 2012  English  Ottawa, Canada  26 November 2012  English  Toronto, Canada  26 November 2012  English  Montreal, Canada  26 November 2012  English  Mexico City, Mexico  9 July 2012  Spanish  Sao Paulo, Brazil  2 July 2012  Brazilian Portugese To find a virtual or in-class event that suits you, go or http://oracle.com/education and choose a course and delivery type in your location.  

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  • Blank pale blue screen with Live USB Kubuntu on AMD Sempron 2800+ processor

    - by WGCman
    I am trying to install Kubuntu onto a USB stick to use on my Acer Aspire 1362 laptop with an AMD Sempron 2800+ chip. Using Windows XP, I downloaded and saved to the laptop's hard drive: kubuntu-2.04.1-desktop-i386.iso from the GetKubuntu website and LinuxLive USB Creator 2.8.16.exe from the Linux live website I then installed the latter and ran it, installing the kubuntu onto the Memory stick. Leaving the Bios setup unchanged, the USB stick is ignored and Windows boots. If I change the Bios boot order so that the memory stick takes precedence, I see a dark blue screen announcing Kubukntu 12.04, and on selecting either “live Mode” or “Persistent mode”, messages flash by quickly, some of which appear to be error messages, including “trying to unpack rootfs image as initramfs”, “cannot allocate resource for mainboard”, “no plug and play device found”. Eventually I see a pale blue screen with four moving dots announcing Kubukntu 12.04, similar to the login screen of my Kubuntu desktop, but no invitation to log in or indeed any dialog. After several minutes, this changes to a black screen with more messages including “no caching mode present”, “ADDRCONF(NETDEV_UP): wlan0: link is not ready”, then degrades to a blank pale blue screen which can only be moved by switching the computer off. Finding no way to log the error messages passing by, I managed to photograph most of them, but know no way to attach the photo to this forum. As suggested by User 68186 (to whom thanks!), I have edited my original post to reflect the recent progress, so the following two comments are now superseded.

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  • Go/Obj-C style interfaces with ability to extend compiled objects after initial release

    - by Skrylar
    I have a conceptual model for an object system which involves combining Go/Obj-C interfaces/protocols with being able to add virtual methods from any unit, not just the one which defines a class. The idea of this is to allow Ruby-ish open classes so you can take a minimalist approach to library development, and attach on small pieces of functionality as is actually needed by the whole program. Implementation of this involves a table of methods marked virtual in an RTTI table, which system functions are allowed to add to during module initialization. Upon typecasting an object to an interface, a Go-style lookup is done to create a vtable for that particular mapping and pass it off so you can have comparable performance to C/C++. In this case, methods may be added /afterwards/ which were not previously known and these new methods allow newer interfaces to be satisfied; while I like this idea because it seems like it would be very flexible (disregarding the potential for spaghetti code, which can happen with just about any model you use regardless). By wrapping the system calls for binding methods up in a set of clean C-compatible calls, one would also be able to integrate code with shared libraries and retain a decent amount of performance (Go does not do shared linking, and Objective-C does a dynamic lookup on each call.) Is there a valid use-case for this model that would make it worth the extra background plumbing? As much as this Dylan-style extensibility would be nice to have access to, I can't quite bring myself to a use case that would justify the overhead other than "it could make some kinds of code more extensible in future scenarios."

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  • Setting up Cluster Configuration using an existing web server as a Primary Node?

    - by RapidWebs
    Thanks in advance for any help which is issued! I am having a slight issue, and need help with the decision making process when it comes to setting up my Cluster Configuration, consisting on a line of Ubuntu Servers (12.04). We currently have a Primary node, which resides in the US within a Datacenter, but we are going to be using this for all serious bandwidth and resource intensive websites, and through a configuration of Virtualmin + Webmin, will be setup as a sort of pseudo-cluster, using Virtualmins Cluster Modules. Anyways, on to the issue: We also have a business line setup locally, with three servers. here are their specs: Intel P4 2.4 ghz, 1GB Ram, 110 gb sata, Ubuntu 12.04* AMD 1.3 ghz, 512MB Ram, 20 GB IDE P3 Xeon 800mhz (dual physical processors), 1GB Ram, 3 * 25 GB Raid Configuration (one in use for host operating system). The first machine is currently IN USE and is serving virtual hosts off a sub-domain. My question is this: How can I integrate the Secondary node (which will be the Primary node per say, in this smaller configuration...) which is currently in use, into the cluster configuration w/ the other two servers for: Sharing Resources Redundancy (HA?) NFS /w the two Raid Disks without having the FORMAT the secondary node, and start fresh moving all my services in to a DRBD network drive or something similar, and than restoring all active virtualmin's Virtual hosts. the idea is that I want minimal downtime to people currently being served from server2.mywebsite.com, and from what I understand, all services need to be on a NFS so that they can be mounted on demand and accessed from the other machine taking over (i.e. Heartbeat + DRBD Config.) but my issue is that i already have all these services installed to their default directory structure: how can i most easily setup this NFS and HA system, move all my desires services to this new drive, and do it with minimal down time, and without breaking Virtualmin and everything else on my server? even just some pointers, a thread i could read, or a step by step check list or run down of commands i could issue to get started would be great! thanks!

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  • Radeon HD 6850 VMware 3D Support?

    - by Matt
    I'm a new Ubuntu user (new to all of linux actually). I've installed Ubuntu 11.10 x64 and have been enjoying it, but I wanted to see how it would perform using VMware for small time gaming since I find dual booting too much of a nuisance to even bother using Ubuntu at all (sorry!). I have an Asus EAH6850 DirectCU Radeon HD 6850 graphics card and I've installed the additional ATI/AMD proprietary FGLRX graphics driver, but when I open a Windows XP 32bit machine I installed through VMware, I get this message: "The GPU driver currently installed on this host may cause issues with VMware products. If you notice any issues please disable the 3D support in the affected virtual machines." I still have 3D capabilities in the VM but they are very very choppy even running the DX tests (the spinning cube). I've seen people on youtube and other forums saying that since the new 3D acceleration in VMware 8 gaming is very possible through VMs (and I've seen them running the DX tests with the spinning cube very smoothly). I'm wondering if my graphics card isn't fully supported or if I have installed it wrong. Also when I check system info (on the host Ubuntu machine) it says "Graphics VESA:BARTS" Should my Radeon HD 6850 be showing up there? The rest of my basic system info i5 2500k 8GB 1600MHz memory Guest is running with access to all 4 cores of processor and 3gb memory assigned.

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  • What does the crash mean? And why is my Ubuntu Blackbox is crashing how can i check deeply?

    - by YumYumYum
    My system was running for a while amount of 6 hour. Two times i loss remote access and it was not functioning anymore IP is gone etc etc. 3 time showing crash but i have no idea what and why. How to know what went wrong? $ last sun pts/0 d51a429c9.access Mon Mar 19 13:44 still logged in sun tty7 :0 Mon Mar 19 12:17 still logged in reboot system boot 2.6.38-8-generic Mon Mar 19 12:17 - 13:49 (01:31) sun pts/0 d51a429c9.access Mon Mar 19 10:05 - crash (02:12) sun tty7 :0 Mon Mar 19 10:00 - crash (02:16) reboot system boot 2.6.38-8-generic Mon Mar 19 10:00 - 13:49 (03:48) sun pts/0 d51a429c9.access Mon Mar 19 09:24 - down (00:35) sun tty7 :0 Mon Mar 19 09:20 - down (00:39) reboot system boot 2.6.38-8-generic Mon Mar 19 09:20 - 10:00 (00:39) sun pts/2 d51a429c9.access Sun Mar 18 18:04 - down (01:14) sun pts/1 d51a429c9.access Sun Mar 18 17:43 - down (01:35) sun pts/0 d51a429c9.access Sun Mar 18 15:07 - 18:47 (03:40) sun pts/1 d51a429c9.access Sun Mar 18 12:58 - 17:42 (04:43) sun pts/0 d51a429c9.access Sun Mar 18 10:21 - 15:06 (04:44) sun tty7 :0 Sun Mar 18 08:56 - down (10:22) reboot system boot 2.6.38-8-generic Sun Mar 18 08:56 - 19:19 (10:22) sun tty7 :0 Sat Mar 17 18:03 - down (14:51) reboot system boot 2.6.38-8-generic Sat Mar 17 18:03 - 08:55 (14:51) sun tty7 :0 Sat Mar 17 15:00 - down (01:38) reboot system boot 2.6.38-8-generic Sat Mar 17 15:00 - 16:39 (01:38) sun pts/0 d51a4297d.access Sat Mar 17 10:45 - 14:32 (03:46) sun tty7 :0 Fri Mar 16 18:46 - crash (20:14) reboot system boot 2.6.38-8-generic Fri Mar 16 18:46 - 16:39 (21:53) $ sensors acpitz-virtual-0 Adapter: Virtual device temp1: +27.8°C (crit = +100.0°C) temp2: +29.8°C (crit = +100.0°C)

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  • Oracle VM 3.1.1 build 365 released

    - by wcoekaer
    A few days ago we released a patch update for Oracle VM 3.1.1 (build 365). Oracle VM Manager 3.1.1 Build 365 is now available from My Oracle Support patch ID 14227416 Oracle VM Server 3.1.1 errata updates are, as usual, released on ULN in the ovm3_3.1.1_x86_64_patch channel. Just a reminder, when we publish errata for Oracle VM, the notifications are sent through the oraclevm-errata maillist. You can sign up here. Some of the bugfixes in 3.1.1 : 14054162 - Removes unnecessary locks when creating VNICs in a multi-threaded operation. 14111234 - Fixes the issue when discovering a virtual machine that has disks in a un-discovered repository or has un-discovered physical disks. 14054133 - Fixes a bug of object not found where vdisks are left stale in certain multi-thread operations. 14176607 - Fixes the issue where Oracle VM Manager would hang after a restart due to various tasks running jobs in the global context. 14136410 - Fixes the stale lock issue on multithreaded server where object not found error happens in some rare situations. 14186058 - Fixes the issue where Oracle VM Manager fails to discover the server or start the server after the server hardware configuration (i.e. BIOS) was modified. 14198734 - Fixes the issue where HTTP cannot be disabled. 14065401 - Fixes Oracle VM Manager UI time-out issue where the default value was not long enough for storage repository creation. 14163755 - Fixes the issue when migrating a virtual machine the list of target servers (and "other servers") was not ordered by name. 14163762 - Fixes the size of the "Edit Vlan Group" window to display all information correctly. 14197783 - Fixes the issue that navigation tree (servers) was not ordered by name. I strongly suggest everyone to use this latest build and also update the server to the latest version. have at it.

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  • Using 12.04 installation as a persistent pen drive

    - by Cawas
    Disclaimer: I aim to build a self contained pen drive with my application inside, so no matter about updates. Maybe I'm looking at the wrong linux distribution to do this... Please let me know if you think so. I've tried knoppix and even lubuntu, but they don't come with enough "drivers" for Unity3D to work. Creating a custom live persistent pen drive is a real pain and I'm trying for 1 day without any success. Sure, being able to do it would probably be ideal and occupy the minimum space. Using the installation image on a pen drive, however, is good enough and is really easy to create. We can even do it from any OS, using UNetBootin, LiLi USB Creator or some other methods. Straight forward. Some recommend installing it on a pen drive. But that requires a lot of space and, I believe, it won't behave as good as something meant to be installed on a usb disk, because of memory management. So, there are only a few negative points on using the installation image that I can think of. Question here, is how to remove those drawbacks: Having to press "Try Ubuntu". That's the big one. Couldn't find how. Unable to load everything on memory and keep on running without the pen drive (like this) Unable to remove "Install Ubuntu 12.04 LTS" app. Setting the ISO to use maximum amount of space for the OS will leave pen drive with zero space left and any file saved within it from ubuntu is inaccessible from the outside (when plugin the pen drive and not booting from it). Am I missing something? Can those points be fixed?

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  • Struggles to connect to network when using WPA with a BCM43225

    - by pst007x
    When booting my laptop, it will try to connect to my wireless network, however a window keeps popping up asking me for my security password, which has already been saved. I have to keep deleting my network settings, and reconnecting, otherwise it keeps failing to connect. My wireless is set up with a WPA, I do not want to lower my security because of this, but it is a pain and can take me 15mins plus to finally connect. The problem has only become apparent since a fresh install of 11.10. IPV6 disabled. System info: 01:00.0 Ethernet controller: Broadcom Corporation NetLink BCM57780 Gigabit Ethernet PCIe (rev 01) Subsystem: Acer Incorporated [ALI] Device 036d Flags: bus master, fast devsel, latency 0, IRQ 43 Memory at b3400000 (64-bit, non-prefetchable) [size=64K] Capabilities: <access denied> Kernel driver in use: tg3 Kernel modules: tg3 02:00.0 Network controller: Broadcom Corporation BCM43225 802.11b/g/n (rev 01) Subsystem: Broadcom Corporation Device 04da Flags: bus master, fast devsel, latency 0, IRQ 17 Memory at b2400000 (64-bit, non-prefetchable) [size=16K] Capabilities: <access denied> Kernel driver in use: brcmsmac Kernel modules: wl, brcmsmac ADDITIONAL: In terminal I get this: pst007x@pst007x-ubuntu64:~$ nm-applet start ** Message: applet now removed from the notification area ** (nm-applet:2816): DEBUG: old state indicates that this was not a disconnect 0 ** Message: using fallback from indicator to GtkStatusIcon ** Message: applet now embedded in the notification area ** Message: No keyring secrets found for Auto Access 01/802-11-wireless-security; asking user. ** (nm-applet:2816): DEBUG: foo_client_state_changed_cb Note this line: ** Message: No keyring secrets found for Auto Access 01/802-11-wireless-security; asking user. At this point is where I am asked for the password. Please report WPA issues with Ubuntu 11.10 here: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/892727

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  • Graph data structures and journal format for mini-IDE

    - by matec
    Background: I am writing a small/partial IDE. Code is internally converted/parsed into a graph data structure (for fast navigation, syntax-check etc). Functionality to undo/redo (also between sessions) and restoring from crash is implemented by writing to and reading from journal. The journal records modifications to the graph (not to the source). Question: I am hoping for advice on a decision on data-structures and journal format. For the graph I see two possible versions: g-a Graph edges are implemented in the way that one node stores references to other nodes via memory address g-b Every node has an ID. There is an ID-to-memory-address map. Graph uses IDs (instead of addresses) to connect nodes. Moving along an edge from one node to another each time requires lookup in ID-to-address map. And also for the journal: j-a There is a current node (like current working directory in a shell + file-system setting). The journal contains entries like "create new node and connect to current", "connect first child of current node" (relative IDs) j-b Journal uses absolute IDs, e.g. "delete edge 7 - 5", "delete node 5" I could e.g. combine g-a with j-a or combine g-b with j-b. In principle also g-b and j-a should be possible. [My first/original attempt was g-a and a version of j-b that uses addresses, but that turned out to cause severe restrictions: nodes cannot change their addresses (or journal would have to keep track of it), and using journal between two sessions is a mess (or even impossible)] I wonder if variant a or variant b or a combination would be a good idea, what advantages and disadvantages they would have and especially if some variant might be causing troubles later.

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  • Ubuntu 13.10 No Sound

    - by spiersie
    I was running 13.04 since last monday and just today i upgraded to 13.10, in both of these version i have not managed to get my sound working. I have gone into alsamixer and disabled auto mute and the volumes are up. However if somebody thinks they can help me fix this i will gladly follow any steps. Please lay specifically any terminal commands you need me to do to either show specs or solve the problem as i am not fluent with the linux commands, this desktop being my first system to run linux, starting last monday. blake@Blake-Ubuntu-PC:~$ lspci -v | grep -A7 -i "audio" 00:01.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Trinity HDMI Audio Controller Subsystem: ASUSTeK Computer Inc. Device 8526 Flags: bus master, fast devsel, latency 0, IRQ 53 Memory at fef44000 (32-bit, non-prefetchable) [size=16K] Capabilities: Kernel driver in use: snd_hda_intel 00:10.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB XHCI Controller (rev 03) (prog-if 30 [XHCI]) 00:14.2 Audio device: Advanced Micro Devices, Inc. [AMD] FCH Azalia Controller (rev 01) Subsystem: ASUSTeK Computer Inc. Device 8445 Flags: bus master, slow devsel, latency 32, IRQ 16 Memory at fef40000 (64-bit, non-prefetchable) [size=16K] Capabilities: Kernel driver in use: snd_hda_intel 00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge (rev 11)

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  • USB device is recognized but has no address

    - by SeanMG
    Good day folks, I'm trying to use a USRP1 with GNURadio if anyone knows what any of that is. I am running Ubuntu on a Windows 7 machine via VMware player. When I connect this USRP1 via USB 2.0 drive to Windows 7 it is recognized as Ettus Research LLC USRP1... When I connect the device to Ubuntu through VMware, it shows: usb device fffe:0002 on my removable devices. When I run lsusb I receive the following: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 002: ID 0e0f:0003 VMware, Inc. Virtual Mouse Bus 002 Device 003: ID 0e0f:0002 VMware, Inc. Virtual USB Hub Bus 001 Device 004: ID fffe:0002 When I run this program that comes with the USRP driver... uhd_find_devices I receive: -------------------------------------------------- -- UHD Device 0 -------------------------------------------------- Device Address: type: usrp1 name: serial: 00000000 So when I run this program, it does recognize the fact that this device is connected. However, the device has no address, no name, and has a null serial. I need to know the device address so I can run more programs in GNURadio. Does anyone know what the problem is here? Thanks!

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  • double-click does not open the default program

    - by Chang
    I installed Ubuntu 12.04, with texlive-full and texworks. When I double-click a .tex file in Nautilus, it pops up a Do you want to run "xxxxxxxx.tex", or display it contents? "xxxxxxxx.tex" is an executable text file. Run in Terminal Display Cancel Run If I choose Display, it opens texworks. How can I make it open without seeing the above conversation window? By the way, is .tex file indeed an executable file? ADDED Just for the case, my ~/.local/share/applications/mimeapps.list file looks like the following: [Default Applications] text/html=google-chrome.desktop x-scheme-handler/http=google-chrome.desktop x-scheme-handler/https=google-chrome.desktop x-scheme-handler/about=google-chrome.desktop x-scheme-handler/unknown=google-chrome.desktop text/x-tex=texworks.desktop x-scheme-handler/mailto=google-chrome.desktop [Added Associations] text/x-tex=texworks.desktop; text/x-bibtex=jabref.desktop;gedit.desktop; I observe texworks are both up and down. Should I remove one? ADDED This does not happen with all .tex files. In fact, I am currently using Ubuntu 12.04 under Virtual Box with Windows 7 host. I have my Dropbox account synced with the Windows 7 host, and I access files in Dropbox in Ubuntu through Virtual Box's shared folder functionality. (I didn't install Dropbox client in Ubuntu.) Files in Dropbox are owned by root with group vboxsf. My personal account is in the group vboxsf. It seems that I have to uncheck the option for "executable", but I have all my .tex files in the Dropbox shared folder. Would there be any workaround?

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  • System speakers not recognized

    - by Kyle Maxwell
    Since upgrading to Xubuntu 13.10, sound has not functioned properly (e.g. screeching when playing Skype notifications). Now, however, it does not function at all. pavucontrol only shows Dummy Output and does not recognize the built-in speakers on my Dell Precision M4600. Possibly related, the sound indicator applet does not come up when I click on it, only showing a small white bar underneath it. I have purged and reinstalled pulseaudio. lspci -v shows: 00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 04) Subsystem: Dell Precision M4600 Flags: bus master, fast devsel, latency 0, IRQ 56 Memory at f2560000 (64-bit, non-prefetchable) [size=16K] Capabilities: <access denied> Kernel driver in use: snd_hda_intel 01:00.1 Audio device: NVIDIA Corporation GF106 High Definition Audio Controller (rev a1) Subsystem: Dell Device 14a3 Flags: bus master, fast devsel, latency 0, IRQ 17 Memory at f0080000 (32-bit, non-prefetchable) [size=16K] Capabilities: <access denied> Kernel driver in use: snd_hda_intel The "Capabilities: <access denied" line makes me wonder if there's a permissions issue, as the Log Out applet now shows "Restart" and "Shutdown" grayed out. groups shows me in: kmaxwell adm dialout cdrom sudo dip plugdev fuse lpadmin netdev sambashare vboxusers

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  • What data should be cached in a multiplayer server, relative to AI and players?

    - by DevilWithin
    In a virtual place, fully network driven, with an arbitrary number of players and an arbitrary number of enemies, what data should be cached in the server memory, in order to optimize smooth AI simulation? Trying to explain, lets say player A sees player B to E, and enemy A to G. Each of those players, see player A, but not necessarily each other. Same applies to enemies. Think of this question from a topdown perspective please. In many cases, for example, when a player shoots his gun, the server handles the sound as a radial "signal" that every other entity within reach "hear" and react upon. Doing these searches all the time for a whole area, containing possibly a lot of unrelated players and enemies, seems to be an issue, when the budget for each AI agent is so small. Should every entity cache whatever enters and exits from its radius of awareness? Is there a great way to trace the entities close by without flooding the memory with such caches? What about other AI related problems that may arise, after assuming the previous one works well? We're talking about environments with possibly hundreds of enemies, a swarm.

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  • CheckMemoryAllocationGame Sample

    - by Michael B. McLaughlin
    Many times I’ve found myself wondering how much GC memory some operation allocates. This is primarily in the context of XNA games due to the desire to avoid generating garbage and thus triggering a GC collection. Many times I’ve written simple programs to check allocations. I did it again recently. It occurred to me that many XNA developers find themselves asking this question from time to time. So I cleaned up my sample and published it on my website. Feel free to download it and put it to use. It’s rather thoroughly commented. The location where you insert the code you wish to check is in the Update method found in Game1.cs. The default that I put in is a line of code that generates a new Guid using Guid.NewGuid (which, if you’re curious, does not create any heap allocations). Read all of the comments in the Update method (at the very least) to make sure that your code is measured properly. It’s important to make sure that you meaningfully reference any thing you create after the second call to get the memory or else (in Release configuration at least) you will likely get incorrect results. Anyway, it should make sense when you read the comments and if not, feel free to post a comment here or ask me on Twitter. You can find my utilities and code samples page here: http://www.bobtacoindustries.com/developers/utils/Default.aspx To download CheckMemoryAllocationGame’s source code directly: http://www.bobtacoindustries.com/developers/utils/CheckMemoryAllocationGame.zip (If you’re looking to do this outside of the context of an XNA game, the measurement code in the Update method can easily be adapted into, e.g., a C# Windows Console application. In the past I mostly did that, actually. But I didn’t feel like adding references to all the XNA assemblies this time and… anyway, if you want you can easily convert it to a console application. If there’s any demand for it, I’ll do it myself and update this post when I get a chance.)

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  • My laptop with Linux/ Ubuntu isn't working

    - by Andy Campos
    I have a dell laptop with ubuntu linux. A day I tried to start it up and a black screen just appeared that says: GNU GRUB version1.98+20100804-5ubuntu3 (and these clickable options:) -Ubuntu, with Linux 2.6.35-22-generic -Ubuntu, with Linux 2.6.35-22-generic (recovery mode) -Memory test (memtest86+) -Memory test (memtest86+, serial console 115200) When I click the first one, a bunch of text appears like: mount: mounting /dev/disk/by-uuid/8396a225... failed: invalid argument mount: mounting /dev on /root/dev failed: no such file or directory mount: mounting /sys on /root/sys failed: no such file or directory mount: mounting /proc on /root/proc failed: no such file or directory Target file system doesn't have requested /sbin/init No init found. Try passing init= bootarg Enter 'help' for a list of built-in commands BusyBox v1.15.3 (Ubuntu 1:1.15.3-1ubuntu5) built-in shell (ash) (initramfs) When I enter 'help' a bunch more incomprehensible text appears. Whenever I press the enter key all that pops up is (intetramfs) If anyone can make rhyme or reason out of this please, please help me out so it can boot up normally and i can be set. If there's some kind of special code I have to type in or something I know nothing about computers.

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  • The NEW MySQL for Developers Course

    - by Antoinette O'Sullivan
    Just Released - The new MySQL for Developers training course.  This 5 day course covers everything a developer needs to know when planning, designing and implementing applications using MySQL, with realistic examples using languages such as Java and PHP. This course gives an in-depth coverage of statements that access and modify data, and shows the student how to design and create other MySQL objects such as triggers, views, and stored procedures. You can take this course: From your desk as a live virtual offering. There are over 800 events on the schedule so you should find one in a timezone near you. The virtual events are also delivered in many languages including English, German, Korean, Latin American Spanish, ... In a classroom. Here is a sample of events on the schedule:  Location  Date  Delivery Language  Prague, Czech Republic 8 October 2012 Czech  Warsaw, Poland 5 November 2012 Polish  Wien, Austria  12 November 2012 German  London, England 15 October 2012 English  Bern, Switzerland  11 April 2013 German  Zurich, Switzerland 14 November 2012 German  Milan, Italy 19 November 2012  Italian  Rome, Italy  15 October 2012  Italian  Gummersbach, Germany  11 February 2013 German  Hamburg, Germany  12 November 2012  German Munich, Germany  10 June 2013  German  Lisbon, Portugal 26 November 2012 European Portuguese  Porto, Portugal 18 February 2013 European Portuguese  Nairobi, Kenya  19 November 2012  English  Madrid, Spain  10 December 2012  Spanish Petaling Jaya, Malaysia  15 October 2012  English  Bangkok, Thailand  29 October 2012  English For further information on the Authentic MySQL Curriculum, to register for an event or express interest in an additional event, go to http://oracle.com/education/mysql.

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  • Boot failure randomly. Can someone help?

    - by desgua
    I often get stuck at the boot on battery. I can suspend and hibernate without any trouble (even on battery). If I plug the energy cable everything goes right most of the time (edited June 13). Adding "acpi=off" doesn't solve the issue. Disabling power save from LAN at BIOS doesn't solve this too. Memory test seems to be ok: I can even compile a kernel without a problem: Has someone a tip for this? (I have the same questions marks in my mind as the image shows if not more :-/ ) obs.: this is an upgraded installation from Natty alpha. edited I (May 22): I've installed a brand new final 11.04 and got the bug again. edited II (June 13): I thought it was solved but it is not. After spending eight days off, the same problem happened even with the power cable connected. I had to reboot about 6 times until success. edited III (June 14): I can boot (even with battery) if I disconnect the cable and take off the battery for a few seconds. This lead me to conclude that maybe something is kept into memory of some hardware. Maybe or maybe not related but I also have touchpad issues (jumps) with this machine. edited IV (June 25): I opened gconf-editor and went to apps gnome-power-manager and disabled everything possibly related to suspend or hibernate. No help. Also I grabbed a Fedora live usb pendrive and got the same problem: So I think it is a hardware problem related issue.

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  • EMEA Engineered Systems Partner Update Call&ndash;October 30th 2013

    - by JuergenKress
    EMEA Engineered Systems Partner Update Call: Engineered Systems (Including Exalogic) updates from Oracle OpenWorld on 30th October, 2013 at 15:00 CET (UTC/GMT +1 Hour) We are pleased to invite you to the next Webcast from our Engineered Systems Partner Update Series. This time it will be all around "Engineered Systems updates from Oracle OpenWorld – all the news from Exalogic included" on Wednesday 30th October, 2013 at 15:00 CET (UTC/GMT +1 Hour). One more year, San Francisco hosted the Oracle OpenWorld, in the month of September. Every year, thousands of partners and customers attend this event to discover new products and solutions, improve their technical proficiency and knowledge, learn tips and tricks for currently installed products and understand where the industry is headed. In case you could not make it to San Francisco this time, we want to provide you with the key updates announced at Oracle OpenWorld around Engineered Systems. Please mark your diaries. You can also attend Larry’s keynote around the Oracle Database 12c In-Memory Database and M6 Big Memory Machine and many more on the Oracle OpenWorld On Demand website. Agenda: Overview of latest Engineered Systems including Exalogic and how Oracle Fusion Middleware performs on the machine How to articulate their value to customers Webcast Joining details: To Join the webcast CLICK HERE For audio reception please use the following details: Global Dial-in Numbers Session/Conference ID: 595 534 979 Password: 12385 WebLogic Partner Community For regular information become a member in the WebLogic Partner Community please visit: http://www.oracle.com/partners/goto/wls-emea ( OPN account required). If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Mix Forum Wiki Technorati Tags: Engineered Systems,Exalogic,OOW,Oracle OpenWorld,WebLogic,WebLogic Community,Oracle,OPN,Jürgen Kress

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  • Confused about implementing Single Responsibility Principle

    - by HichemSeeSharp
    Please bear with me if the question looks not well structured. To put you in the context of my issue: I am building an application that invoices vehicles stay duration in a parking. In addition to the stay service there are some other services. Each service has its own calculation logic. Here is an illustration (please correct me if the design is wrong): public abstract class Service { public int Id { get; set; } public bool IsActivated { get; set; } public string Name { get; set } public decimal Price { get; set; } } public class VehicleService : Service { //MTM : many to many public virtual ICollection<MTMVehicleService> Vehicles { get; set; } } public class StayService : VehicleService { } public class Vehicle { public int Id { get; set; } public string ChassisNumber { get; set; } public DateTime? EntryDate { get; set; } public DateTime? DeliveryDate { get; set; } //... public virtual ICollection<MTMVehicleService> Services{ get; set; } } Now, I am focusing on the stay service as an example: I would like to know at invoicing time which class(es) would be responsible for generating the invoice item for the service and for each vehicle? This should calculate the duration cost knowing that the duration could be invoiced partially so the like is as follows: not yet invoiced stay days * stay price per day. At this moment I have InvoiceItemsGenerator do everything but I am aware that there is a better design.

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  • Huwawei E220 broadband dongle not working

    - by Roshnal
    The problem is, I have used Ubuntu from 6.10 upto 11.10. And upto 11.04 I used my same USB 3G dongle to connect to broadband and it worked fine. But 2 days ago I upgraded to Ubuntu 11.10 and broadband is not working. It detects my dongle and creates a connection without a problem, but when connecting it just keeps on and on for a long time and then say I'm offline. So I did a clean install and the same thing occurred. But I also have a netbook and its got Ubuntu 11.10. I tried using the same dongle for internet on that netbook and it worked fine without any issues. But this isn't a problem with my USB port on my main machine or something like that because I'm also using Windows on my main machine (dual-boot) and its working fine. My hardware: Main computer (one that I'm trying to connect): 2.8GHz dual core Intel 2GB RAM 500GB Sata II HDD 384MB Video Memory (Intel G31/G33 chipset) Ubuntu 11.10 (32bit) My NetBook (broadband working fine): 1.6GHz Intel Atom (dual core) 1GB DDR3 RAM 250GB HDD 128MB Video Memory (Intel something-I-can't-remember) Ubuntu 11.10 (32bit) My dongle is a Huawei E220 and ISP is Dialog GSM (I'm in Sri Lanka) So any idea why this is? I really love Ubuntu and this is bugging me off.. Any help greatly appreciated. Regards, Roshnal

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