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  • ubuntu is not booting [duplicate]

    - by prasannajit
    This question already has an answer here: After update, get “error: file not found.” followed by “grub rescue> _” 5 answers last night i was trying to upgrade my ubuntu 12.04 to 12.10. every update was completed and finally when it asked for restart ,i restarted the system, then onwords it is not starting up showing message error:file not found. grub rescue> _ can any one plz help how to get rid of this problem. my system is dual os (windows 7 and ubuntu ) hp pavellion dv4 series

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  • How to upgrade to 12.10 daily build from 12.04? [closed]

    - by Forbidden Overseer
    Possible Duplicate: How do I upgrade to the development release (aka. Ubuntu+1)? I was suggested these commands when I searched for it on Google: sudo sed -i 's/precise/quantal/g' /etc/apt/sources.list sudo apt-get update && sudo apt-get dist-upgrade But, I don't know whether that works or not. So my question is: How to upgrade 12.04 to the 12.10 daily build? How to rollback to 12.04 if the daily build breaks? You might ask me why I want to try something like that... it's probably because I want to check out all the new upgrades that have been done in quantal. Another bonus question: If I select the "precise-proposed" updates in Update Manager, how close will my 12.04 come off to the 12.10? Are these precise proposed updates same as "quantal-proposed"? What are the differences?

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  • Java : encore une nouvelle faille critique, 1,1 milliard d'utilisateurs concernés par cette vulnérabilité de Java 5, 6 et 7

    Faille de sécurité critique dans Java 7 Update 6 pouvant être utilisée pour installer des malwares, la désactivation de la plateforme recommandée Les experts en sécurité tirent la sonnette d'alarme pour la dernière version de la plateforme Java. Java 7 Update 6 serait sujet à une vulnérabilité activement exploitée. Les chercheurs en sécurité du cabinet FireEye ont découvert une faille de sécurité dans la plateforme pouvant être exploitée pour infecter des ordinateurs avec des logiciels malveillants. La vulnérabilité aurait été utilisée pour installer à distance le cheval de Troie Poison Ivy, qui a été utilisé dans le passé dans de nombreuses campagnes de cyberespionnage. L...

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  • Is the Observer pattern adequate for this kind of scenario?

    - by Omega
    I'm creating a simple game development framework with Ruby. There is a node system. A node is a game entity, and it has position. It can have children nodes (and one parent node). Children are always drawn relatively to their parent. Nodes have a @position field. Anyone can modify it. When such position is modified, the node must update its children accordingly to properly draw them relatively to it. @position contains a Point instance (a class with x and y properties, plus some other useful methods). I need to know when a node's @position's state changes, so I can tell the node to update its children. This is easy if the programmer does something like this: @node.position = Point.new(300,300) Because it is equivalent to calling this: # Code in the Node class def position=(newValue) @position = newValue update_my_children # <--- I know that the position changed end But, I'm lost when this happens: @node.position.x = 300 The only one that knows that the position changed is the Point instance stored in the @position property of the node. But I need the node to be notified! It was at this point that I considered the Observer pattern. Basically, Point is now observable. When a node's position property is given a new Point instance (through the assignment operator), it will stop observing the previous Point it had (if any), and start observing the new one. When a Point instance gets a state change, all observers (the node owning it) will be notified, so now my node can update its children when the position changes. A problem is when this happens: @someNode.position = @anotherNode.position This means that two nodes are observing the same point. If I change one of the node's position, the other would change as well. To fix this, when a position is assigned, I plan to create a new Point instance, copy the passed argument's x and y, and store my newly created point instead of storing the passed one. Another problem I fear is this: somePoint = @node.position somePoint.x = 500 This would, technically, modify @node's position. I'm not sure if anyone would be expecting that behavior. I'm under the impression that people see Point as some kind of primitive rather than an actual object. Is this approach even reasonable? Reasons I'm feeling skeptical: I've heard that the Observer pattern should be used with, well, many observers. Technically, in this scenario there is only one observer at a time. When assigning a node's position as another's (@someNode.position = @anotherNode.position), where I create a whole new instance rather than storing the passed point, it feels hackish, or even inefficient.

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  • Battery died when updating from 12.04 to 12.10

    - by Aksh BriZmohun
    I started the update and went to sleep but I forgot to plugin AC adapter. When i woke up, laptop was off. I plugged in the AC cord and turned it on. Ubuntu boots and it is on 12.10 but may items are missing and neither gnome nor unity seem to work properly. It's also very slow and freezes sometimes. Is there a way to correct all those issues ? or revert back to 12.04 then re update to 12.10 without losing my data ?

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  • Updating NVIDIA drivers from 295.40: What will happen to TwinView?

    - by Spice
    Right now, I have the NVIDIA proprietary drivers enabled without the Ubuntu-X repo, so the driver version is 295.40 (which is on the official Ubuntu repo) instead of the current 304.64 for my card, but I want to update to the current (using the Ubuntu-X repo). From what I heard, after 302.xx, NVIDIA started supporting RandR and removed TwinView. My question is, I have TwinView enabled for two monitors. If I update to the new version, what will happen to my TwinView settings? Will there be any extra work to do to migrate to the new driver?

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  • Ubuntu 12.04 Nvidia GTX 460 video card installation

    - by aczietlow
    Currently testing Ubuntu 12.04 x64 for our development team. After upgrading from 11.10 I've been having video card issues. I'm using Nvidia GeForce GTX 460. When ever I try to launch Nvidia X server I get the following error message. You do not appear to be using the NVIDIA X driver. Please edit your X configuration file (just run nvidia-xconfig as root), and restart the X server. I've tried running sudo nvidia-xconfig multiple times and rebooting with no success. I've also tried getting the nvidia-current driver from the x-swat repo sudo apt-add-repository ppa:ubuntu-x-swat/x-updates sudo apt-get update sudo apt-get install nvidia-current Followed again by a reboot did nothing for me but knock my resolution down to 800x600 Finally I've tried sudo apt-get purge xserver-xorg sudo apt-get update sudo apt-get install xserver-xorg xserver-xorg-video-all sudo reboot Does anyone have any thoughts or directions they could point me in? To the best of my understanding my video card is suppose to be supported.

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  • Ubuntu server upgrade 11.04 to 11.10 fails

    - by DLosc
    I'm actually trying to upgrade my Ubuntu 11.04 server to 12.04, but I have to go through 11.10 first, right? Well, do-release-upgrade is failing miserably. Here are some representative screenshots: Screenshot 1 Screenshot 2 Screenshot 3 Screenshot 4 And finally... Yeah. I found this question, which appears to have similar errors, but I've tried all of the suggestions given there and nothing has changed. I tried running apt-get dist-upgrade; it churned for a while and eventually came back with "Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?" Ran apt-get update and got much the same kinds of error messages I got from do-release-upgrade. Any ideas/suggestions/solutions? Should I try downloading & upgrading from the CD instead? I'm glad to provide any further information I've forgotten.

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  • Upgrade Ubuntu 10.04 to Ubuntu 10.10

    - by user8561
    Hi. I'm new to these forums so I'll be quick. When I try to upgrade to Ubuntu 10.10 from 10.04 I get this error, I have tried upgrading from Terminal and Update Manager as well. Could not determine the upgrade An unresolvable problem occurred while calculating the upgrade: E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages. This can be caused by: * Upgrading to a pre-release version of Ubuntu * Running the current pre-release version of Ubuntu * Unofficial software packages not provided by Ubuntu If none of this applies, then please report this bug against the 'update-manager' package and include the files in /var/log/dist-upgrade/ in the bug report. Restoring original system state Thanks Aborting

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  • Should the networking of my game be a component or a service?

    - by aalcutt
    I am working on a windows game and I am trying to understand the XNA GameComponents and GameServices classes and use. From what I understand about a component is that it has an Update method that gets call in every frame, and a service can be referenced from other components if needed. So the way I think a network component would work is that in its Update method it would receive and send data. It probably makes sense to receive the network data once per frame, but it doesn't for sending it. Shouldn't the game send its own updates to others the moment it has it to cut down on lag?

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  • Synchronizing (updating) published files

    - by MucMug
    How can I update a published file and maintain the same URL? After saving an update of a published file on my desktop, it will automatically "synchronise" with the corresponding files at UbuntuOne (and it does). Problem is that the "new file", actually the updated file with the same name, is no longer published. Pressing the publish button results is a new URL. I now have to mail new URL's and change embedded links, as old URL will result in a failure to find the updated file (or indeed any file). I am not sure if it is a bug or a design flaw (maybe intentional?), but it seems strange to me.

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  • My computter wont shutdown

    - by marijn
    If I try to shutdown my computer it simply takes me back to the login-screen. I looked around and found : Type in terminal: 1. sudo gedit /etc/default/grub 2. Find the line: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" 3. Change this to: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=force" 4. Save the file and close the file. 5. Finally, in terminal: sudo update-grub but now there is a new problem. if I try step 5 it says: myname@ubuntu:~$ sudo update-grub [sudo] password for myname: /usr/sbin/grub-probe: error: cannot find a device for / (is /dev mounted?). myname@ubuntu:~$ I am new whit linux and dont know what to do.

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  • Faille de sécurité critique dans Java 7 : Oracle informé depuis avril 2012, et ne réagit toujours pas

    Faille de sécurité critique dans Java 7 Update 6 pouvant être utilisée pour installer des malwares, la désactivation de la plateforme recommandée Les experts en sécurité tirent la sonnette d'alarme pour la dernière version de la plateforme Java. Java 7 Update 6 serait sujet à une vulnérabilité activement exploitée. Les chercheurs en sécurité du cabinet FireEye ont découvert une faille de sécurité dans la plateforme pouvant être exploitée pour infecter des ordinateurs avec des logiciels malveillants. La vulnérabilité aurait été utilisée pour installer à distance le cheval de Troie Poison Ivy, qui a été utilisé dans le passé dans de nombreuses campagnes de cyberespionnage. L...

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  • Java game applet development

    - by RomZes
    I'm getting 4 sec delay when sending objects over UDP. Working on small game and trying to implement multiplayer. For now just trying to synchronize movements of 2 balls on the screen. StartingPoint.java is my server(first player), that receiving serialized objects (coordinates). SecondPlayer.java is client that sending serialized objects to server. When I'm moving my first object it appears 4 seconds later on different screen. StartingPoint.java @Override public void run() { byte[] receiveData = new byte[256]; byte[] sendData = new byte[256]; // DatagramSocket socketS; try { socket = new DatagramSocket(5000); System.out.println("Socket created on "+ port + " port"); } catch (SocketException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } while(true){ b1.update(this); b3.update(); System.out.println("Starting server..."); //// Receiving and deserializing object try { //socket.setSoTimeout(1000); DatagramPacket packet = new DatagramPacket(buf, buf.length); socket.receive(packet); byte[] data = packet.getData(); ByteArrayInputStream in = new ByteArrayInputStream(data); ObjectInputStream is = new ObjectInputStream(in); // socket.setSoTimeout(300); b1 = (Ball) is.readObject(); } catch (IOException | ClassNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } repaint(); try { Thread.sleep(17); } catch (InterruptedException e) { e.printStackTrace(); } SecondPlayer.java @Override public void run() { while(true){ b.update(); networkSend(); repaint(); try { Thread.sleep(17); } catch (InterruptedException e) { e.printStackTrace(); } } public void networkSend(){ // Serialize to a byte array try { ByteArrayOutputStream bStream = new ByteArrayOutputStream(); ObjectOutputStream oo; oo = new ObjectOutputStream(bStream); oo.writeObject(b); oo.flush(); oo.close(); byte[] bufCar = bStream.toByteArray(); //socket = new DatagramSocket(); //socket.setSoTimeout(1000); InetAddress address = InetAddress.getByName("localhost"); DatagramPacket packet = new DatagramPacket(bufCar, bufCar.length, address, port); socket.send(packet); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); }

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  • JDK 7u10 Released !

    - by user9148683
    Java Development Kit 7 Update 10 (JDK 7u10) release is now live! You can download it from Java SE Downloads page. The Java™ SE Development Kit 7, Update 10 Release Notes contains information about this release. The highlights of this release include: New Certified System Configurations - Mac OS X 10.8 and Windows 8 Security Feature Enhancements: The ability to disable any Java application from running in the browser. This mode can be set in the Java Control Panel or (on Microsoft Windows platform only) using a command-line install argument. New dialogs to warn you when the JRE is insecure (either expired or below the security baseline) and needs to be updated. The documentation at Setting the Level of Security for the Java Client and Java Control Panel explains these features in detail.

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  • Fusion Middleware 11gR1 : 2012?6??????

    - by Hiro
    2012?6? (2012/06/19 ??)?Fusion Middleware 11gR1 ?????????????? ? ????????????2??????? 1. Oracle WebCenter SitesFatWire???????Oracle WebCenter Sites 11.1.1.6.0 ????????????FatWire Software??????????????????????????????????"Oracle WebCenter Sites"?????????????????Fusion Middleware????? 11g Release 1 ??????????? Oracle WebCenter Sites 11.1.1.6.0 ?????????????????????HP-UX????????????????????HP-UX??????????FatWire???????????????? ????????????????????Release Notes (??)?????????? ???????????????AIX, Linux x86, Linux x86-64, Solaris (SPARC), Windows (32-bit), Windows x64 ?????? 2. Oracle JRockit, JRE/JDK??????Oracle JRockit, JRE/JDK????????????????? Oracle JRockit R28.2.3 Oracle JRE/JDK 6 Update 32 Oracle JRE/JDK 7 Update 4 ? ??????????????

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  • Fusion Middleware 11gR1 : 2012?9??????

    - by Hiro
    2012?9? (2012/09/11 ??)?Fusion Middleware 11gR1 ?????????????? ? ????????????2??????? 1. Oracle JRE/JDK??????Oracle JRE/JDK????????????????? Oracle JRE/JDK 6 Update 33 Oracle JRE/JDK 7 Update 5 2. Oracle Identity ManagerOracle Identity Manager Connectors ????????????????? ? ??????????????AIX, HP-UX Itanium, Linux x86, Linux x86-64, Solaris (SPARC), Solaris x86-64, Windows (32-bit), Windows x64 ?????? ???????????????

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  • JUnit Easymock Unexpected method call

    - by Lancelot
    Hi, I'm trying to setup a test in JUnit w/ EasyMock and I'm running into a small issue that I can't seem to wrap my head around. I was hoping someone here could help. Here is a simplified version of the method I'm trying to test: public void myMethod() { //Some code executing here Obj myObj = this.service.getObj(param); if (myObj.getExtId() != null) { OtherObj otherObj = new OtherObj(); otherObj.setId(myObj.getExtId()); this.dao.insert(otherObj); } //Some code executing there } Ok so using EasyMock I've mocked the service.getObj(myObj) call and that works fine. My problem comes when JUnit hits the dao.insert(otherObj) call. EasyMock throws a "Unexpected Method Call" on it. I wouldn't mind mocking that dao in my test and using expectLastCall().once(); on it, but that assumes that I have a handle on the "otherObj" that's passed as a parameter at insert time... Which of course I don't since it's conditionally created within the context of the method being tested. Anyone has ever had to deal with that and somehow solved it? Thanks.

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  • Inserting Google Maps into a WYSIWYG editor, then saving and retrieving properly

    - by Tatu Ulmanen
    Hi, I'm trying to extend jWysiwyg with an function to add a map from Google Maps. I can get the map all right, but I'm having problems with how to handle the generated map so it can be saved with the page and then retrieved. To open the process up a bit: User enters editor which is created using jWysiwyg. User clicks on a button which asks for an address, then returns the corresponding latitude and longitude. I use this location information to create a map using Google Maps API (V3), which I then insert into the editable WYSIWYG area. When I save the page, the whole Google generated HTML gets saved into the database, which will not work properly when opened next time (I get a grey box when I open up the page again). Now, the problem is that I need to insert the map in such a format that it will work afterwards (perhaps using <script> tags). I also need the map to be visible in the WYSIWYG editor itself, so I cannot just put in a placeholder tag which would later be populated with the correct map data. So, in short; how would you insert a Google Map into a WYSIWYG editor in a way that it is both visible/previewable from the editor itself and could also be saved in a format that would work properly when opened the next time?

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  • Thread-safe data structures

    - by Inso Reiges
    Hello, I have to design a data structure that is to be used in a multi-threaded environment. The basic API is simple: insert element, remove element, retrieve element, check that element exists. The structure's implementation uses implicit locking to guarantee the atomicity of a single API call. After i implemented this it became apparent, that what i really need is atomicity across several API calls. For example if a caller needs to check the existence of an element before trying to insert it he can't do that atomically even if each single API call is atomic: if(!data_structure.exists(element)) { data_structure.insert(element); } The example is somewhat awkward, but the basic point is that we can't trust the result of exists call anymore after we return from atomic context (the generated assembly clearly shows a minor chance of context switch between the two calls). What i currently have in mind to solve this is exposing the lock through the data structure's public API. This way clients will have to explicitly lock things, but at least they won't have to create their own locks. Is there a better commonly-known solution to these kinds of problems? And as long as we're at it, can you advise some good literature on thread-safe design? Thank you.

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  • Parameter index is out of range

    - by czuroski
    Hello, I am getting the following error when trying to update an object using nhibernate. I am attempting to update a field which is a foreign key. Any thoughts why I might be getting this error? I can't figure it out from that error and my log4net log doesn't give any hints either. Thanks System.IndexOutOfRangeException was unhandled by user code Message="Parameter index is out of range." Source="MySql.Data" StackTrace: at MySql.Data.MySqlClient.MySqlParameterCollection.CheckIndex(Int32 index) at MySql.Data.MySqlClient.MySqlParameterCollection.GetParameter(Int32 index) at System.Data.Common.DbParameterCollection.System.Collections.IList.get_Item(Int32 index) at NHibernate.Type.Int32Type.Set(IDbCommand rs, Object value, Int32 index) at NHibernate.Type.NullableType.NullSafeSet(IDbCommand cmd, Object value, Int32 index) at NHibernate.Type.NullableType.NullSafeSet(IDbCommand st, Object value, Int32 index, ISessionImplementor session) at NHibernate.Persister.Entity.AbstractEntityPersister.Dehydrate(Object id, Object[] fields, Object rowId, Boolean[] includeProperty, Boolean[][] includeColumns, Int32 table, IDbCommand statement, ISessionImplementor session, Int32 index) at NHibernate.Persister.Entity.AbstractEntityPersister.Update(Object id, Object[] fields, Object[] oldFields, Object rowId, Boolean[] includeProperty, Int32 j, Object oldVersion, Object obj, SqlCommandInfo sql, ISessionImplementor session) at NHibernate.Persister.Entity.AbstractEntityPersister.UpdateOrInsert(Object id, Object[] fields, Object[] oldFields, Object rowId, Boolean[] includeProperty, Int32 j, Object oldVersion, Object obj, SqlCommandInfo sql, ISessionImplementor session) at NHibernate.Persister.Entity.AbstractEntityPersister.Update(Object id, Object[] fields, Int32[] dirtyFields, Boolean hasDirtyCollection, Object[] oldFields, Object oldVersion, Object obj, Object rowId, ISessionImplementor session) at NHibernate.Action.EntityUpdateAction.Execute() at NHibernate.Engine.ActionQueue.Execute(IExecutable executable) at NHibernate.Engine.ActionQueue.ExecuteActions(IList list) at NHibernate.Engine.ActionQueue.ExecuteActions() at NHibernate.Event.Default.AbstractFlushingEventListener.PerformExecutions(IEventSource session) at NHibernate.Event.Default.DefaultFlushEventListener.OnFlush(FlushEvent event) at NHibernate.Impl.SessionImpl.Flush() at NHibernate.Transaction.AdoTransaction.Commit() at DataAccessLayer.NHibernateDataProvider.UpdateItem_temp(items_temp item_temp) in C:\Documents and Settings\user\My Documents\Visual Studio 2008\Projects\mySolution\DataAccessLayer\NHibernateDataProvider.cs:line 225 at InventoryDataClean.Controllers.ImportController.Edit(Int32 id, FormCollection formValues) in C:\Documents and Settings\user\My Documents\Visual Studio 2008\Projects\mySolution\InventoryDataClean\Controllers\ImportController.cs:line 101 at lambda_method(ExecutionScope , ControllerBase , Object[] ) at System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClassa.<InvokeActionMethodWithFilters>b__7() at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) InnerException: Here is my item mapping - <?xml version="1.0" encoding="utf-8" ?> <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" assembly="DataTransfer" namespace="DataTransfer"> <class name="DataTransfer.items_temp, DataTransfer" table="items_temp"> <id name="id" unsaved-value="any" > <generator class="assigned"/> </id> <property name="assetid"/> <property name="description"/> <property name="caretaker"/> <property name="category"/> <property name="status" /> <property name="vendor" /> <many-to-one name="statusName" class="status" column="status" /> </class> </hibernate-mapping> Here is my status mapping - <?xml version="1.0" encoding="utf-8" ?> <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" assembly="DataTransfer" namespace="DataTransfer"> <class name="DataTransfer.status, DataTransfer" table="status"> <id name="id" unsaved-value="0"> <generator class="assigned"/> </id> <property name="name"/> <property name="def"/> </class> </hibernate-mapping> and here is my update function - public void UpdateItem_temp(items_temp item_temp) { ITransaction t = _session.BeginTransaction(); try { _session.SaveOrUpdate(item_temp); t.Commit(); } catch (Exception) { t.Rollback(); throw; } finally { t.Dispose(); } }

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  • Transferring data from Salesforce using Apex Data Loader to Oracle

    - by Barret
    While attempting to transfer data from Salesforce using Apex Data Loader to Oracle Keep getting the following error: 26937 [databaseAccountExtract] FATAL com.salesforce.dataloader.dao.database.Data baseContext - Error getting value for SQL parameter: nkey__c. Please make sure that the value exists in the configuration file or is passed in. Database conf iguration: insertAccount. The database-conf.xml has the following beans: <bean id="insertAccount" class="com.salesforce.dataloader.dao.database.DatabaseConfig" singleton="true"> <property name="sqlConfig" ref="insertAccountSql"/> <property name="dataSource" ref="dbDataSource"/> </bean> <bean id="insertAccountSql" class="com.salesforce.dataloader.dao.database.SqlConfig" singleton="true"> <property name="sqlString"> <value> INSERT INTO VANTROPO.SF_ACCOUNTCHANNEL (nkey__c) VALUES (@nkey__c@) </value> </property> <property name="sqlParams"> <map> <entry key="nkey__c" value="java.lang.String"/> </map> </property> </bean> The SDL (mapping file) has the following values: # Account Insert Mapping values for query from Salesforce (left) and insert/update to Oracle (right) # SalesforceFieldName=OracleFieldName nkey__c=NKEY__C Any help appreciated.

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