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• Never before had a problem with Ubuntu desktop graphical display; Trying to use nvidia GT630

  - by focaccio

  I've been using ubuntu since 9.04 and never had a problem with Ubuntu brining up the desktop graphical user interface. However I am currently not able to see anything graphical past the install screens. I have an Intel DP55KG motherboard and just installed an nvidia gt630 graphics card (zotac), since the old graphics card failed. I can install the server and see text. So I do a apt-get install ubuntu-desktop...or apt-get install kubuntu-desktop...or apt-get install xubuntu desktop, but after the reboot there is no display...its like something is hung up. I tried using the Live quantal dvd and I do see the graphical prompt to try without installing, but after that the screen goes blank. I've tried two monitors and the same thing happens. There is a faint "glow" on the screen and I do not get a "no input signal" from the monitor, so something is happening. I can install an old OEM of XP so I know the video card and motherboard are at least semi functional. Any help is appreciated. Thanks, Greg

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• ReSharper 7.1 update

  - by TATWORTH

  Jet Brains have announced ReSharper 7.1: a considerable update to the powerful .NET developer productivity tool for Visual Studio. They invite you to download ReSharper 7.1 and take it for a free 30-day trial. I urge you to try this excellent Visual Studio add-on. Here is their announcement: Following this update, ReSharper 7 brings even more value to all .NET developers, such as more ways to refactor, inspect, clean up, review and generate code. Feature highlights of ReSharper 7 now include: Full integration with Visual Studio 2012 while maintaining support for Visual Studio 2005, 2008, and 2010.Performance and bug fixes: Since releasing version 7.0 this summer, we have fixed over 300 performance problems and bugs.New code inspections and contract annotations for a more robust .NET code quality analysis. Sharing ReSharper code inspection results with teammates has been streamlined as well for the purposes of code review.Improved tooling for .NET code maintenance including the top requested Extract Class refactoring that helps decrease code complexity, as well as a way to remove unused assembly references across the entire solution.Enhanced code formatter: We have implemented some of the most demanded code formatter improvements so far. For example, ReSharper 7.1 is able to format XML doc comments and chained method calls.Additional code exploration features helping visualize hierarchies of polymorphic members and CSS styles.An extended and fine-tuned code generation toolset. In terms of support for specific technologies and frameworks, ReSharper 7 is on the cutting edge as well, providing: Support for VB.NET refined with the Extract Class refactoring, new quick-fixes and improved IntelliSense.XAML support considerably enhanced in terms of code completion, typing assistance, naming style control, and code generation.An extensive pack of functionality for developers looking to create Windows Store applications for Windows 8.INotifyPropertyChanged interface support pack to improve productivity of Windows Forms, WPF and Silverlight application developers.Extended web development toolset, including improvements to JavaScript support, and initial support for ASP.NET 4.5 and ASP.NET MVC 4.Addition of two previously unsupported Microsoft development technologies: LightSwitch and SharePoint. For details on features and improvements in ReSharper 7 and a 30-day free trial, please read What's New in ReSharper 7.

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• Using ConcurrentQueue for thread-safe Performance Bookkeeping.

  - by Strenium

  Just a small tidbit that's sprung up today. I had to book-keep and emit diagnostics for the average thread performance in a highly-threaded code over a period of last X number of calls and no more. Need of the day: a thread-safe, self-managing stats container. Since .NET 4.0 introduced new thread-safe 'Collections.Concurrent' objects and I've been using them frequently - the one in particular seemed like a good fit for storing each threads' performance data - ConcurrentQueue. But I wanted to store only the most recent X# of calls and since the ConcurrentQueue currently does not support size constraint I had to come up with my own generic version which attempts to restrict usage to numeric types only: unfortunately there is no IArithmetic-like interface which constrains to only numeric types – so the constraints here here aren't as elegant as they could be. (Note the use of the Average() method, of course you can use others as well as make your own).   FIFO FixedSizedConcurrentQueue using System;using System.Collections.Concurrent;using System.Linq; namespace xxxxx.Data.Infrastructure{    [Serializable]    public class FixedSizedConcurrentQueue<T> where T : struct, IConvertible, IComparable<T>    {        private FixedSizedConcurrentQueue() { }         public FixedSizedConcurrentQueue(ConcurrentQueue<T> queue)        {            _queue = queue;        }         ConcurrentQueue<T> _queue = new ConcurrentQueue<T>();         public int Size { get { return _queue.Count; } }        public double Average { get { return _queue.Average(arg => Convert.ToInt32(arg)); } }         public int Limit { get; set; }        public void Enqueue(T obj)        {            _queue.Enqueue(obj);            lock (this)            {                T @out;                while (_queue.Count > Limit) _queue.TryDequeue(out @out);            }        }    } }   The usage case is straight-forward, in this case I’m using a FIFO queue of maximum size of 200 to store doubles to which I simply Enqueue() the calculated rates: Usage var RateQueue = new FixedSizedConcurrentQueue<double>(new ConcurrentQueue<double>()) { Limit = 200 }; /* greater size == longer history */   That’s about it. Happy coding!

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• Is there a common programming term for the problems of adding features to an already-featureful program?

  - by Jeremy Friesner

  I'm looking for a commonly used programming term to describe a software-engineering phenomenon, which (for lack of a better way to describe it) I'll illustrate first with a couple of examples-by-analogy: Scenario 1: We want to build/extend a subway system on the outskirts of a small town in Wyoming. There are the usual subway-problems to solve, of course (hiring the right construction company, choosing the best route, buying the subway cars), but other than that it's pretty straightforward to implement the system because there aren't a huge number of constraints to satisfy. Scenario 2: Same as above, except now we need to build/extend the subway system in downtown Los Angeles. Here we face all of the problems we did in case (1), but also additional problems -- most of the applicable space is already in use, and has a vocal constituency which will protest loudly if we inconvenience them by repurposing, redesigning, or otherwise modifying the infrastructure that they rely on. Because of this, extensions to the system happen either very slowly and expensively, or they don't happen at all. I sometimes see a similar pattern with software development -- adding a new feature to a small/simple program is straightforward, but as the program grows, adding further new features becomes more and more difficult, if only because it is difficult to integrate the new feature without adversely affecting any of the large number of existing use-cases or user-constituencies. (even with a robust, adaptable program design, you run into the problem of the user interface becoming so elaborate that the program becomes difficult to learn or use) Is there a term for this phenomenon?

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• Partner Webcast - Oracle Business Process Management: What’s new in Oracle BPM 11.1.1.7.0 - 04 July 2013

  - by Thanos

  Business processes are at the heart of what makes or breaks a business—and what differentiates it from the competition. Business processes that deliver operational efficiency, business visibility, excellent customer experience, and agility give the enterprise an edge over the competition. Business managers need process management tools that enable them to make impactful changes. Oracle has been always a leader in this area and the new version of Oracle BPM 11g takes that even further by providing complete web based process modeling, simulation and implementation including designing the user interface and business logic. That provides business users with ability to take complete control over the business processes without sacrificing the vast service integration capabilities delivered traditionally by IT using SOA approach. Oracle Business Process Management is the industry's most complete and business user-friendly BPM solution. Register today for this webcast and find out more on the latest and most exciting new features which are now available in Oracle BPM Suite. Agenda Introduction do Oracle BPM 11g Exciting new features in this release Revamped Process Composer Simulations Web Forms Process Player Adaptive Case Management Instance Revisioning Other features Demonstration Q&A Delivery Format This FREE online LIVE eSeminar will be delivered over the Web. Registrations received less than 24hours prior to start time may not receive confirmation to attend. Duration: 1 hour Register Now! For any questions please contact us at [email protected] Visit our ISV Migration Center blog & Facebook Page or Follow us @oracleimc  to learn more on Oracle Technologies, upcoming partner webcasts and events. Existing content available YouTube - SlideShare - Oracle Mix

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• Working with the ADF DVT Map Component

  - by Shay Shmeltzer

  The map component provided by the ADF Faces DVT set of components is one that we are always ending up using in key demos - simply because it is so nice looking, but also because it is quite simple to use. So in case you need to show some geographical data, or if you just want to impress your manager, here is a little video that shows you how to create two types of maps. The first one is a color themed map - where you show different states with different colors based on the value of some data point there. The other is a point theme - basically showing specific locations on the map. For both cases I'm using the Oracle provided mapviewer instance at http://elocation.oracle.com/mapviewer. You can find more information about using the map component in the Web User Interface Developer's Guide here and in the tag doc and components demo. For the first map the query I'm using (on the HR demo schema in the Oracle DB) is: SELECT     COUNT(EMPLOYEES.EMPLOYEE_ID) , Department_name , STATE_PROVINCE FROM     EMPLOYEES,     DEPARTMENTS,     LOCATIONS WHERE employees.department_id=departments.department_idand Departments.location_id=locations.location_idGROUP BY Department_name,    LOCATIONS.STATE_PROVINCE

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• Announcing Two Papers Addressing the RPAS Fusion Client

  - by Oracle Retail Documentation Team

  Oracle Retail has published two documents to My Oracle Support addressing the Retail Predictive Application Server (RPAS) Fusion Client, a web-based rich client developed using the latest Oracle Application Development Framework (ADF). The Fusion Client provides an enhanced user experience for communicating with the RPAS server. Oracle Retail Predictive Application Server Fusion Client Getting Started Guide Doc ID 1492759.1The Retail Predictive Application Server (RPAS) is a configurable platform that provides capabilities such as a multidimensional database structure, batch and online processing, a configurable user interface, a configurable calculation engine, user security, and utility functions such as importing and exporting, all on a highly scalable technical environment that can be deployed on a variety of hardware. This paper addresses typical questions that arise during setting up and deploying the Fusion Client, provides performance recommendations, and highlights the differences between the Classic Client and the Fusion Client. Oracle Retail RPAS Fusion Client Performance Issue Report Doc ID 1493747.1Performance issues can be frustrating for customers, and Oracle Retail will strive to assist you as you attempt to enhance the performance of your systems. To ensure the timeliest processing of your issue, retailers and partners are encouraged to respond as thoroughly as possible to each question in this document, which can be sent back for analysis by logging a Service Request and following typical Customer Support processes. The sections of the document solicit information about the following: Performance Issue Description Performance Issue Details System Configuration Data Application Configuration Data Performance Log Files

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• Is there any way to facilitate switching windows in Ubuntu?

  - by Ivan

  I'm just a student who received my laptop from my uncle, who's a coder, so I'm still getting used to working with ubuntu. I recently upgraded ubuntu from an earlier version, and everything seems to be pretty great. The only thing is that when I open a program, or file, or whatever, it takes up the whole screen. I can only close it by going to the far top left of my screen, or by ctrl+W. Anyways, I find it really hard to switch between programs. For example I really like to have my windows that are open to be accessible by clicking on their icon at the bottom of the screen... Great when writing or researching. Anyways, I really just want to find an easier way to switch windows. Also, I used to love the way I could cube-rotate my screen, and just drag files from one desktop to another, with compiz. Now, its sort of like flipping a coin when I switch windows, is there any way to get my desktop cube back? And yes, I have enabled all the old settings I used to use with compiz. Sorry if what I'm asking is very basic, I know how to use a computer, I'm just not really familiar with the interface! Any help is greatly appreciated.

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• how to architect this to make it unit testable

  - by SOfanatic

  I'm currently working on a project where I'm receiving an object via web service (WSDL). The overall process is the following: Receive object - add/delete/update parts (or all) of it - and return the object with the changes made. The thing is that sometimes these changes are complicated and there is some logic involved, other databases, other web services, etc. so to facilitate this I'm creating a custom object that mimics the original one but has some enhanced functionality to make some things easier. So I'm trying to have this process: Receive original object - convert/copy it to custom object - add/delete/update - convert/copy it back to original object - return original object. Example: public class Row { public List<Field> Fields { get; set; } public string RowId { get; set; } public Row() { this.Fields = new List<Field>(); } } public class Field { public string Number { get; set; } public string Value { get; set; } } So for example, one of the "actions" to perform on this would be to find all Fields in a Row that match a Value equal to something, and update them with some other value. I have a CustomRow class that represents the Row class, how can I make this class unit testable? Do I have to create an interface ICustomRow to mock it in the unit test? If one of the actions is to sum all of the Values in the Fields that have a Number equal to 10, like this function, how can design the custom class to facilitate unit tests. Sample function: public int Sum(FieldNumber number) { return row.Fields.Where(x => x.FieldNumber.Equals(number)).Sum(x => x.FieldValue); } Am I approaching this the wrong way?

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• Vector-based fonts vs. bitmap fonts in (2d) games?

  - by jmp97

  I know that many games are using bitmap fonts. Which are the advantages for vector-based font rendering / manipulation when compared to bitmap fonts and in which scenarios would they matter the most? Prefer a focus on 2d games when answering this question. If relevant, please include examples for games using either approach. Some factors you might consider: amount of text used in the game scaling of text overlaying glyphs and anti-aliasing general rendering quality font colors and styling user interface requirements localisation / unicode text wrapping and formatting cross-platform deployment 2d vs 3d Background: I am developing a simple falling blocks game in 2d, targeted for pc. I would like to add text labels for level, score, and menu buttons. I am using SFML which uses FreeType internally, so vector-based features are easily available for my project. In my view, font sizes in simple games often don't vary, and bitmap fonts should be easier for cross-platform concerns (font-formats and font rendering quality). But I am unsure if I am missing some important points here, especially since I want to polish the looks of the final game.

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• Driver for asus wireless PC card WL-100GE

  - by emab

  I have bought an Asus wireless LAN PC Card WL-100GE model, and I am using lubuntu on my system. While I have no cable connection, currently I cannot access the internet and update my laptop. Device: Broad Range Wireless Card Bus Adaptor - Asus - WL-100GE I searched the web and couldn't find any adequate driver for it. Is there any solution for it? My sudo lshw -C network output is: *-network description: Ethernet interface product: RTL-8100/8101L/8139 PCI Fast Ethernet Adapter vendor: Realtek Semiconductor Co., Ltd. physical id: 3 bus info: pci@0000:02:03.0 logical name: eth0 version: 10 serial: 00:02:3f:ba:55:c8 size: 10Mbit/s capacity: 100Mbit/s width: 32 bits clock: 33MHz capabilities: pm bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=8139too driverversion=0.9.28 duplex=half latency=128 link=no maxlatency=64 mingnt=32 multicast=yes port=MII speed=10Mbit/s resources: irq:19 ioport:3000(size=256) memory:e0200800-e02008ff *-network description: Network controller product: BCM4318 [AirForce One 54g] 802.11g Wireless LAN Controller vendor: Broadcom Corporation physical id: 1 bus info: pci@0000:07:00.0 version: 02 width: 32 bits clock: 33MHz capabilities: bus_master configuration: driver=b43-pci-bridge latency=64 resources: irq:21 memory:38000000-38001fff ----:~$ iwconfig lo no wireless extensions. eth0 no wireless extensions.

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• My Windows Phone 7 experience: 45 days in

  - by Enrique Lima

  November 13th, 2010 was the day I got my Windows Phone 7.  It was an exciting day, a lot of anxiety too.  Over a phone? Sadly, yes! Being a Zune Pass subscriber, it was something worth looking forward too, being a consultant that relies and works with Microsoft technologies and having the option of OneNote (without converters and such) on my phone was a great thing too. Has that changed over 45 days?  No, not really.  But I find myself at the very same place I was with my iPhone, I don’t really use the music player as I spend enough time in front of a computer where I have Pandora and the Zune Desktop.  Or in a car with Satellite Radio.  As for OneNote, that keeps me hooked and with access to my notes no matter where I take them. The Device: Samsung Focus Likes: OneNote integration, Zune capabilities (just note my comment above), fast and smooth interface, calendar, tiles, the device itself. Dislikes: Heavy glitches in SharePoint interaction. And a very weird one I have experienced is, any pictures I get sent from an iPhone via email will register as an attachment but the pictures are not listed as the attachment once I open the message … weird!!  Then, of course, some apps have not made it to the platform (not sure they ever will … Pandora??!!??  Chase??!!??).  But those apps missing is not the phone, or Microsoft’s fault (IMO).  In summary, I am happy with it, and some of the missing apps have made me shift the way I work with the products or features affected … meaning I rely on my desktop stuff for that.

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• Javascript storing data

  - by user985482

  Hi I am a beginner web developer and am trying to build the interface of a simple e-commerce site as a personal project.The site has multiple pages with checkboxes.When someone checks an element it retrives the price of the element and stores it in a variable.But when I go to the next page and click on new checkboxes products the variable automaticly resets to its original state.How can I save the value of that variable in Javascript? This is the code I've writen using sessionStorage but it still dosen't work when I move to next page the value is reseted. How can I wright this code so that i dosen't reset on each page change.All pages on my website use the same script. $(document).ready(function(){ var total = 0; $('input.check').click(function(){ if($(this).attr('checked')){ var check = parseInt($(this).parent().children('span').text().substr(1 , 3)); total+=check; sessionStorage.var_name=0 + total; alert(sessionStorage.var_name); }else{ var uncheck = parseInt($(this).parent().children('span').text().substr(1 , 3)); total-=uncheck; } })

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• How to enable a Web portal-based rich enterprise platform on different domains and hosts using JS without customization/ server configuration

  - by S.Jalali

  Our company Coscend has built a Web portal-based communications and cloud collaboration platform by using JavaScript (JS), which is embedded in HTML5 and formatted with CSS3. Other technologies used in the core code include Flash, Flex, PostgreSQL and MySQL. Our team would like to host this platform on five different Windows and Linux environments that run different types of Web servers such as IIS and Apache. Technical challenge: Each of these Windows and Linux servers have a different host name and domain name (and IP address), but we would like to keep our enterprise platform independent of host server configuration. Possible approach to solution: We think an API (interface module with a GUI) is needed to accomplish this level of modularity and flexibility while deploying at our enterprise customers. Seeking your insights: In this context, our team would appreciate your guidance on: Is there an algorithmic method to implement this Web portal-based platform in these Windows and Linux environments while separating it from server configuration, i.e., customizing the host name, domain name and IP address for each individual instance? For example, would it be suitable to create some JS variables / objects for host name and domain name and call them in the different implementations? If a reference to the host/domain names occurs on hundreds of portal modules, these variables or JS objects would replace that. If so, what is the best way to make these object modules written in JS portable and re-usable across different environments and instances for enterprise customers? Here is an example of the implemented code for the said platform. The following Web site (www.CoscendCommunications.com) was built using this enterprise collaboration platform and has the base code examples of the platform. This Web site is domain-specific. We like to make the underlying platform such that it is domain and host-independent. This will allow the underlying platform to be deployed in multiple instances of our enterprise customers.

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• How to Avoid a Busy Loop Inside a Function That Returns the Object That's Being Waited For

  - by Carl Smith

  I have a function which has the same interface as Python's input builtin, but it works in a client-server environment. When it's called, the function, which runs in the server, sends a message to the client, asking it to get some input from the user. The user enters some stuff, or dismisses the prompt, and the result is passed back to the server, which passes it to the function. The function then returns the result. The function must work like Python's input [that's the spec], so it must block until it has the result. This is all working, but it uses a busy loop, which, in practice, could easily be spinning for many minutes. Currently, the function tells the client to get the input, passing an id. The client returns the result with the id. The server puts the result in a dictionary, with the id as the key. The function basically waits for that key to exist. def input(): '''simplified example''' key = unique_key() tell_client_to_get_input(key) while key not in dictionary: pass return dictionary.pop(pin) Using a callback would be the normal way to go, but the input function must block until the result is available, so I can't see how that could work. The spec can't change, as Python will be using the new input function for stuff like help and pdb, which provide their own little REPLs. I have a lot of flexibility in terms of how everything works overall, but just can't budge on the function acting exactly like Python's. Is there any way to return the result as soon as it's available, without the busy loop?

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• Wireless keeps disabling or stays disconnected (Realtek RTL8191SEvB)

  - by jindrichm

  I have Realtek RTL8191SEvB wireless card on Ubuntu 10.10: $ lspci -v | grep Network 03:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8191SEvB Wireless LAN Controller (rev 10) When I load its driver, according to the Network Manager it sometimes blinks with a list of available networks but it keeps disabling itself or it stays disconnected. So, I can't connect to any wi-fi network (which results in frustration). The driver is loaded: $ lsmod Module Size Used by r8192se_pci 509932 0 Looks normal: $ sudo lshw -C network *-network description: Wireless interface product: RTL8191SEvB Wireless LAN Controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:03:00.0 logical name: wlan0 version: 10 serial: 1c:65:9d:60:c7:7a width: 32 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=rtl819xSE driverversion=0019.1207.2010 firmware=63 latency=0 link=no multicast=yes wireless=802.11bgn resources: irq:17 ioport:2000(size=256) memory:f0500000-f0503fff Configured: $ sudo iwconfig wlan0 wlan0 802.11bgn Nickname:"rtl8191SEVA2" Mode:Managed Frequency=2.412 GHz Access Point: Not-Associated Bit Rate:130 Mb/s Retry:on RTS thr:off Fragment thr:off Encryption key:off Power Management:off Link Quality=10/100 Signal level=0 dBm Noise level=-100 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0 Is not blocked: $ rfkill list all 0: tpacpi_bluetooth_sw: Bluetooth Soft blocked: no Hard blocked: yes However something's happening with it: $ dmesg [ 6485.948668] InitializeAdapter8190(): ==++==> Turn off RF for RfOffReason(1073741824) ---------- [ 6486.062666] rtl8192_SetWirelessMode(), wireless_mode:10, bEnableHT = 1 [ 6486.062671] InitializeAdapter8192SE(): Set MRC settings on as default!! [ 6486.062675] HW_VAR_MRC: Turn on 1T1R MRC! [ 6486.064091] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 6486.248761] rtl8192_SetWirelessMode(), wireless_mode:10, bEnableHT = 1 [ 6486.248771] InitializeAdapter8192SE(): Set MRC settings on as default!! [ 6486.248776] HW_VAR_MRC: Turn on 1T1R MRC! [ 6486.580083] GPIOChangeRF - HW Radio OFF [ 6486.610085] ============>sync_scan_hurryup out [ 6486.623814] ================>r8192_wx_set_scan(): hwradio off [ 6486.830484] =========>r8192_wx_set_essid():hw radio off,or Rf state is eRfOff, return So, does anyone know where the problem might be?

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• E-Bus ATG Advisor Webcast program - June Edition

  - by cwarticki

  E-Business Suite Applications Technology Group (ATG) Advisor Webcast Program – June 2014 Thursday June 12, 2014 at 18:00 UK / 10:00 PST / 11:00 MST / 13:00 EST EBS Patch Wizard Overview ·      What is Oracle EBS Patch Wizard Tool? ·      Benefits of the Patch Wizard utility ·      Patch Wizard Interface ·      Patch Impact Analysis Details & Registration : Note 1672371.1 Direct registration link Thursday June 26, 2014 at 18:00 UK / 10:00 PST / 11:00 MST / 13:00 EST EBS Proactive Analyzers Overview ·         What are Oracle Support Analyzers? ·         How to identify the Analyzers available? ·         Short Analyzers Overview ·         Patch Impact Analysis ·         How to use an Analyzer? Details & Registration : Note 1672363.1 Direct registration link If you have any question about the schedules or if you have a suggestion for an Advisor Webcast to be planned in future, please send an E-Mail to Ruediger Ziegler.

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• Wubi installation broken by update - now unable to mount

  - by Outspaced

  As of today, my wubi installation of Ubuntu won't boot (goes straight to 'minimal bash-like interface) and I am unable to mount it when I boot straight to Ubuntu. If I boot straight into Ubuntu (not using Wubi, not going via Windows), I am able to mount the Windows partition and see the Wubi partition there: sudo mount -t ntfs /dev/sda5 /media/winxp And from there I can see the wubi root disk: /media/winxp/ubuntu/disks/root.disk But if I try to mount this: sudo mount -o loop /media/winxp/ubuntu/disks/root.disk /media/wubi I get an error: /media/winxp/ubuntu/disks/root.disk Input/Output Error If I then try fsck: sudo fsck /media/winxp/ubuntu/disks/root.disk I get this: Input/Output Error while trying to open /media/winxp/ubuntu/disks/root.disk The Superblock could not be read or does not describe a correct etx2 filesystem. If the device is valid and it really contains an ext2 filesystem (and not swap or ufs or something else), then the superblock is corrupt and you might want to try running e2fsk with an alternate superblock: e2fsck -b 8193 <device ... this gives me the same result. There is data on this partition that I really need to be able to access, so I can't delete and reinstall. Any help much appreciated. Thanks.

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• Ubuntu 12.04 Fails to Boot after Reboot

  - by Joe

  I have installed Ubuntu 12.04 on several Dell c6220 servers. The install was successful and all hardware is recognized. The problem that I am running into is that when issuing the reboot command or when pressing ctrl-alt-del, the server shuts down, but never comes back up. Instead, the fan revs up to full speed and stays that way until I power the server down. Once the server has been powered down via the power button, Ubuntu will boot just fine -- until the next reboot. I have found that by rebooting the server via the DRAC web interface will reboot the server correctly. I have also found that this problem does not exist with CentOS -- I can press ctrl-alt-del all day long and it always comes back up. I've tried several kernel parameters such as: reboot=bios reboot=pci reboot=acpi reboot=cold acpi=off noapic Nothing seems to work. I have also tried upgrading to kernel 3.4, but no change there, either. Has anyone run into a similar problem or any pointers on troubleshooting? Thanks, Joe

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• Is there a product planning tool that has these specific features? [closed]

  - by acjohnson55

  I am working on a web startup in the early stages, and we are struggling a bit to manage the scope and scheduling of our product. We have loads of high-level features in the pipeline, but we need a good way of scheduling them for release iterations and breaking them into actual tasks that can be scheduled (that could be a separate tool, but integration would be preferred). I would say that our product can be pretty cleanly divided into "aspects", and we want to be able to separate features by the aspect to which they apply. Perhaps most importantly, it should be really simple to create and move features between target release points. We don't have physical space for a war room type setup, so whatever we settle upon should ideally have a cloud-type web interface. Right now, we're using Excel to make a grid of product aspects vs. target releases, and we store features at the intersections. But this is not providing a good way of indexing tasks to those features or being able to move them around. I would much rather have something that automates the grid overview. I'm less interested in something that helps with low-level scheduling than I am in something that is good at organizing the product plan at the long-term, high-level view. Is there a product planning tool out there that matches these specifications?

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• Do cross reference database tables have a place in domain driven design?

  - by Mike Cellini

  First some background. Let's say we have a system where a customer is placing an order in a web interface. The items that customer is ordering can priced in various ways. Sometimes including the cost of delivery and sometimes not at all. That pricing effectively depends on a variety of factors including the vendor's own pricing model, that vendor's individual contracts with customers as well as that vendor's contracts with its own suppliers. Let's assume that once a customer places an order for a particular item and chooses a contract if any, the method of delivery can be determined by variables on those contracts. Those delivery methods also live in their own table in the database and have various properties consumed downstream. It makes sense that a cross reference or lookup table would store that information. That table would be loaded into the domain and could then be used to apply the appropriate delivery method while processing the order. Does this make sense in the context of domain driven design? Or is my thinking too relational? Is this logic that should be built into it's own class/method (I mean beyond apply the cross reference table data)?

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• Whole continent simulation [on hold]

  - by user2309021

  Let's suppose I am planning to create a simulation of an entire continent at some point in the past (let's say, around 0 A.D). Is it feasible to spawn a hundred million actors that interact with each other and their environments? Having them reproduce, extract resources, etc? The fact is that I actually want to create a simulation that allows me to zoom in from a view of the entire continent up to a single village, and interact with it. (Think as if you could keep zooming in the campaign map of any Total War game and the transition to the battle map was seamless, not a change of the "game mode"). By the way, I have never made a game in my entire life (I have programmed normal desktop applications, though), so I am really having trouble wrapping my head around how to implement such a thing. Even while thinking about how to implement a simple population simulator, without a graphical interface, I think that the O(n) complexity of traversing an array and telling all people to get one year older each time the program ticks is kind of stupid. Any kind help would be greatly appreciated :) EDIT: After being put on hold, I shall specify a question. How would you implement a simulation of all basic human dynamics (reproduction, resource consumption) in an entire continent (with millions of people)?

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• What relational database system should I learn? [closed]

  - by acidzombie24

  At the moment i know sqlite (my favorite), mysql (its ok, i get annoyed) and i do not want to learn ms/t sql (it only allows one nullable row if the column is unique). I am thinking about learning a new database system. My requirements for it is Must allow multiple connections at once (read and write) All or data i choose must be ACID compliant Performance should be good. I have a 17gb table in one project. It should perform well on read and transactional writes. With mysql it took hours to restore it and there were no foreign keys on that specific table. It only finished in a workday because i found a suggestion to adjust a setting which i think was key-buffer. And it still took hours Unique columns that allow more then one row to be null. I shouldn't have to say it but dammit MS. Allows one to make ongoing backups. Something like 'binary logs'. Some relatively small amounts of data i can grab and apply it to my local db to have it in sync with the one on the server. Table joins. I rather not write a bunch of queries to simulate a join What I would like but is not required Foreign keys. This may be a requirement later Open sourced Fair tool support. So i can measure queries, easily backup/restore, etc .NET and C (or C++) interface. (I seen one that uses raw tcp with JSON which was okish) Good subquery support. Once i was working with an older version of mysql (i believe <5.1 but it could have been 5.1) and i had to write many queries to do one query because it couldn't do subqueries. Or maybe it couldnt do it efficiently and died bc of memory limitations with a huge dataset. What db system should i learn?

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• MVC pattern synchronisation

  - by Hariprasad

  I am facing a problem in synchronizing my model and view threads I have a view which is table. In it, user can select a few rows. I update the view as soon as the user clicks on any row since I don't want the UI to be slow. This updating is done by a logic which runs in the controller thread below. At the same time, the controller will update the model data too, which takes place in a different thread. i.e., controller puts the query in a queue, which is then executed by the model thread - which is a single-threaded interface. As soon as the query executes, controller will get a signal. Now, In order to keep the view and model synchronized, I will update the view again based on the return value of the query (the data returned by model) - even though I updated the view already for that user action. But, I am facing issues because, its taking a lot of time for the model to return the result, by that time user would have performed multiple clicks. So, as a result of updating the view again based on the information from model, the view sometimes goes back to the state in which the previous clicks were made (Suppose user clicks thrice on different rows. I update the view as soon as the click happens. Also, I update the view when I get data back from the model - which is supposed to be same as the already updated state of the view. Now, when the user clicks third time, I get data for the first click from model. As a result, view goes back to a state which is generated by the first click) Is there any way to handle such a synchronization issue?

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• Multitouch screen not detected on Asus Taichi 21DH71

  - by geekfreak

  I just bought this Ultrabook "Asus Taichi 21 DH71". This has Intel 3rd generation i7 processor and 4gb ram with 256 gb SSD. The main feature is that it is a hybrid machine. Naming it has dual screens. When the lid is closed it can be used as a tablet and when lid open it can be used as a notebook. This machine can also be used with the two screens on at the same time. I used ubuntu many years ago and loved it. But I never tried any linux later. My questions are Does the new version of Ubuntu support the Multitouch interface? Will it work specifically on this machine? Will Ubuntu support gestures on multi touchpad? Update 2/22/2013 I did try the latest 64bit Ubuntu(12.10) from live usb and noticed that it couldn't detect the tablet screen. Everything else worked seamlessly. Do you guys think the tablet screen would be detected if I make a complete installation on to the notebook? Please help guys..

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