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  • Why does my Ubuntu freeze in the middle of something with a blank screen?

    - by mohamed
    I am facing a serious problem as my Dell Optiplex 745 loaded with Ubuntu 12.04 32bit freezes with a blank screen no mouse cursor no keyboard activity in many occasions. Sometimes when I open firefox, or software center, I really can't tell what the main problem is, but what i am certain about is it i have to do a hard reset to reboot. I tried to use a live-cd to boot but it did the same, tried the recovery console but couldn't find a way to fix from there (I am a new user) suspected a hardware problem but windows runs flawlessly so I believe its something related to ubuntu. Specs: Intel Celeron D 3.06 GHZ 3.0 GB ram Intel built in graphics Q965 1 TB HDD Bios Phoenex 2.6.4 Please help I really love ubuntu and I don't want to go back to windows!

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  • New EFI Laptop: After restart, Ubuntu boots to black screen?

    - by Henson S
    So, I've got this new laptop (Acer Aspire 5560 15") that's doing a funny thing.. If I cold booth the machine, everything is great! I see the grub menu, and Ubuntu 12.04 loads just fine. If I reboot within Ubuntu, I see the BIOS screen, but then nothing. No grub menu, no hard drive activity except for just a blip. I noticed that when installing Ubuntu this time, I had to create an EFI boot partition -- something I'm not used to. And I'm guessing that it has something to do with the issue. Could be totally wrong. Any ideas?

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  • Hangs on Splash Screen after login (auto-login), how can I fix this?

    - by Davious
    Computer: Toshiba Terca A4 OS: Ubuntu Desktop 10.10 After installing 10.10, the splash screen hangs and the mouse pointer appears. Anyone know what I can do to fix this? ~/.xsession-errors has (nautilus:3190): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed btw, Safe-mode works: I do a Ctrl-Alt-F1 into a command prompt session and run ps aux | grep slave then sudo kill [id of gdm-simple-slave] That killed the session and allowed me to login in safe-mode. Safe-mode works. Then I open a terminal and run ps aux | grep nm- sudo kill -9 [id of nm-applet] nm-applet --sm-disable & to get my internet connection up.

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  • Is there a way to force lubuntu screen resolution?

    - by za1
    I have a Dell Inspiron 4000, 900 Mhz Pentium III, 192 MB RAM,10.1 GB disk running Lubuntu 12.04. When I start the computer, and I check the display resolution, Monitor Settings claims that the max resolution is 1024x768. I then connected another monitor I had lying around, rebooted, and now the laptop monitor looks normal,and monitor settings claims that 1280x1024 is the max resolution (it is) and the other monitor doesn't turn on. (black screen) The external monitor is not broken. Is there a way to, without the external monitor, force the laptop monitor resolution to 1280x1024? (The following is another question) - How can you run commands automatically at startup? Specifically "xinput 18 118 0" (without quotes) The first question is important, I can live with typing the second one at every boot. Thanks

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  • Why am I missing the Ubuntu icon on the log-in screen?

    - by dtdlurch
    I am running Ubuntu 12.10. On the log-in screen, there is no Ubuntu icon for me to click on to change desktop environments. I know where it should be, but it is simply not there. Why is this? And how can I get it back??? I just installed Cinnamon and I would very much like to switch to this environment. I apologize if this is has been addressed elsewhere, but I honestly did try to research before asking. I found several similar questions, but nothing that has answers that helped my situation. And an hour of Googling did not produce anything helpful at all. Thank you for your help.

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  • Create a screen like the iPhone home screen with Scrollview and Buttons

    - by Anthony Chan
    Hi, I'm working on a project and need to create a screen similar to the iPhone home screen: A scrollview with multiple pages A bunch of icons When not in edit mode, swipe through different pages (even I started the touch on an icon) When not in edit mode, tap an icon to do something When in edit mode, drag the icon to swap places, and even swap to different pages When in edit mode, tap an icon to remove it Previously I read from several forums that I have to subclass UIScrollview in order to have touch input for the UIViews on top of it. So I subclassed it overriding the methods to handle touches: - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { //If not dragging, send event to next responder if (!self.dragging) [self.nextResponder touchesBegan:touches withEvent:event]; else [super touchesBegan:touches withEvent:event]; } In general I've override the touchesBegan:, touchesMoved: and touchesEnded: methods similarly. Then in the view controller, I added to following code: - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; UIView *hitView = (UIView *)touch.view; if ([hitView isKindOfClass:[UIView class]]) { [hitView doSomething]; NSLog(@"touchesBegan"); } } - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { // Some codes to move the icons NSLog(@"touchesMoved"); } - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { NSLog(@"touchesEnded"); } When I run the app, I have the touchesBegan method detected correctly. However, when I tried to drag the icon, the icon just moved a tiny bit and then the page started to scroll. In console, it logged with 2 or 3 "touchesMoved" message only. However, I learned from another project that it should logged tonnes of "touchesMoved" message as long as I'm still dragging on the screen. (I'm suspecting I have the delaysContentTouches set to YES, so it delays a little bit when I tried to drag the icons. After that minor delay, it sends to signal back to the scrollview to scroll through the page. Please correct me if I'm wrong.) So if any help on the code to perform the above tasks would be greatly appreciated. I've stuck in this place for nearly a week with no hope. Thanks a lot.

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  • LDAP to change user password

    - by neobie
    As I know, in PHP, we need to connect LDAP over SSL in order to change user password. Is there another way, E.G, other language (JAVA / ASP) to change LDAP password without SSL required? Thanks. Updates: I get "Warning: ldap_mod_replace() [function.ldap-mod-replace]: Modify: Insufficient access" when I try to modify self account password. If i try to change other user password, I get no error message, but the password still stick to the old one.

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  • Finding furthermost point in game world

    - by user13414
    I am attempting to find the furthermost point in my game world given the player's current location and a normalized direction vector in screen space. My current algorithm is: convert player world location to screen space multiply the direction vector by a large number (2000) and add it to the player's screen location to get the distant screen location convert the distant screen location to world space create a line running from the player's world location to the distant world location loop over the bounding "walls" (of which there are always 4) of my game world check whether the wall and the line intersect if so, where they intersect is the furthermost point of my game world in the direction of the vector Here it is, more or less, in code: public Vector2 GetFurthermostWorldPoint(Vector2 directionVector) { var screenLocation = entity.WorldPointToScreen(entity.Location); var distantScreenLocation = screenLocation + (directionVector * 2000); var distantWorldLocation = entity.ScreenPointToWorld(distantScreenLocation); var line = new Line(entity.Center, distantWorldLocation); float intersectionDistance; Vector2 intersectionPoint; foreach (var boundingWall in entity.Level.BoundingWalls) { if (boundingWall.Intersects(line, out intersectionDistance, out intersectionPoint)) { return intersectionPoint; } } Debug.Assert(false, "No intersection found!"); return Vector2.Zero; } Now this works, for some definition of "works". I've found that the further out my distant screen location is, the less chance it has of working. When digging into the reasons why, I noticed that calls to Viewport.Unproject could result in wildly varying return values for points that are "far away". I wrote this stupid little "test" to try and understand what was going on: [Fact] public void wtf() { var screenPositions = new Vector2[] { new Vector2(400, 240), new Vector2(400, -2000), }; var viewport = new Viewport(0, 0, 800, 480); var projectionMatrix = Matrix.CreatePerspectiveFieldOfView(MathHelper.PiOver4, viewport.Width / viewport.Height, 1, 200000); var viewMatrix = Matrix.CreateLookAt(new Vector3(400, 630, 600), new Vector3(400, 345, 0), new Vector3(0, 0, 1)); var worldMatrix = Matrix.Identity; foreach (var screenPosition in screenPositions) { var nearPoint = viewport.Unproject(new Vector3(screenPosition, 0), projectionMatrix, viewMatrix, worldMatrix); var farPoint = viewport.Unproject(new Vector3(screenPosition, 1), projectionMatrix, viewMatrix, worldMatrix); Console.WriteLine("For screen position {0}:", screenPosition); Console.WriteLine(" Projected Near Point = {0}", nearPoint.TruncateZ()); Console.WriteLine(" Projected Far Point = {0}", farPoint.TruncateZ()); Console.WriteLine(); } } The output I get on the console is: For screen position {X:400 Y:240}: Projected Near Point = {X:400 Y:629.571 Z:599.0967} Projected Far Point = {X:392.9302 Y:-83074.98 Z:-175627.9} For screen position {X:400 Y:-2000}: Projected Near Point = {X:400 Y:626.079 Z:600.7554} Projected Far Point = {X:390.2068 Y:-767438.6 Z:148564.2} My question is really twofold: what am I doing wrong with the unprojection such that it varies so wildly and, thus, does not allow me to determine the corresponding world point for my distant screen point? is there a better way altogether to determine the furthermost point in world space given a current world space location, and a directional vector in screen space?

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  • Screen scraping over SSL with .NET

    - by Even Mien
    What solutions exist for screen scraping a site over SSL for use with .NET? My use case is that I need to login to a partner website (https), navigate through a dynamic hierarchy, and download a zipped file of reports. I certainly could use other screen scrapers if there are no good viable options in .NET, either though the framework or OSS.

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  • Brief white screen when loading PHP page?

    - by orbit82
    What would cause a brief flash of white screen while a PHP page is loading? I just noticed it today on a WordPress theme that I am building and am wondering if this is a cause for concern. As a page loads, the screen will flash white before showing the page content. Sometimes this happens on every single page load, other times it only happens intermittently.

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  • What are usability, accessibility, screen-reader or any other development, functionality, cross brow

    - by jitendra
    What are the usability, accessibility, screen-reader, or any other development, functionality, or cross browser issues with <iframe>? Is there any alternative for <iframe>? And are there any JavaScript/jQuery or server-side techniques which can decrease the usability, accessibility, or screen-reader issues with <iframe>? Why has the W3C not included <iframe> in XHTML Strict, while HTML 5 supports <iframe>?

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  • prevent screen rotation android

    - by Sephy
    hi everybody, I have one of my activities which I would like to prevent from rotating because i'm starting an AsynTask, and screen rotation makes it restart... so is there any way to tell this activity "DO NOT ROTATE the screen even if the user is shaking his phone like mad"? Thx for the constant help guys.

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  • How to speed up loading the splash screen.

    - by AngryHacker
    I am optimizing the startup of a WinForms app. One issue I identified is the loading of the splash screen form. It takes about half a second to a second. I know that multi-threading is a no-no on UI pieces, however, seeing how the splash screen is a fairly autonomous piece of the application, is it possible to somehow mitigate its performance hit by throwing it one some other thread (perhaps in the way Chrome does it), so that the important pieces of the application can actually get going.

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  • Multiple View App shows Blank Screen in Simulator

    - by Brett Coburn
    Hello; I am developing a simple app that first shows a menu screen, and when a button is pressed, a game screen appears. I was able to develop the game screen without any issues, but when I changed the code to first display the menu, the simulator showed a blank screen. I've read all the articles on connecting views with IB but I can't figure this out. Any help would be appreciated. This is my code: // Pong_Multiple_ViewAppDelegate.h // Pong Multiple View // // Created by Brett on 10-05-19. // Copyright __MyCompanyName__ 2010. All rights reserved. // #import <UIKit/UIKit.h> @class MenuViewController; @interface Pong_Multiple_ViewAppDelegate : NSObject <UIApplicationDelegate> { UIWindow *window; MenuViewController *navigationController; } @property (nonatomic, retain) IBOutlet UIWindow *window; @property (nonatomic, retain) IBOutlet MenuViewController *navigationController; @end // // Pong_Multiple_ViewAppDelegate.m // Pong Multiple View // // Created by Brett on 10-05-19. // Copyright __MyCompanyName__ 2010. All rights reserved. // #import "Pong_Multiple_ViewAppDelegate.h" #import "MenuViewController.h" @implementation Pong_Multiple_ViewAppDelegate @synthesize window; @synthesize navigationController; - (void)application:(UIApplication *)application{ // Override point for customization after application launch [window addSubview:[navigationController view]]; [window makeKeyAndVisible]; } - (void)dealloc { [navigationController release]; [window release]; [super dealloc]; } @end // // MenuViewController.h // Pong Multiple View // // Created by Brett on 10-05-19. // Copyright 2010 __MyCompanyName__. All rights reserved. // #import <UIKit/UIKit.h> #import "GameViewController.h" @interface MenuViewController : UIViewController { GameViewController *gameViewController; IBOutlet UIButton *gameButton; } @property(nonatomic, retain) GameViewController *gameViewController; @property(nonatomic, retain) UIButton *gameButton; -(IBAction)switchPage:(id)sender; @end // // MenuViewController.m // Pong Multiple View // // Created by Brett on 10-05-19. // Copyright 2010 __MyCompanyName__. All rights reserved. // #import "MenuViewController.h" #import "GameViewController.h" @implementation MenuViewController @synthesize gameViewController; @synthesize gameButton; -(IBAction)switchPage:(id)sender{ if (self.gameViewController==nil) { GameViewController *gameView = [[GameViewController alloc]initWithNibName:@"GameView" bundle:[NSBundle mainBundle]]; self.gameViewController= gameView; [gameView release]; } [self.navigationController pushViewController:self.gameViewController animated:YES]; } .... @end My code also includes classes: GameViewController.h, GameViewController.m, and nib files: MenuView.xib, and GameView.xib Thanks, B

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  • Crossplatform way to change screen resolution

    - by macropas
    Is there any crossplatform way (Windows, Linux, MacOSX) to change screen resolution? Neither Java nor .Net-Mono can do it. Only through native API invocation. It's very strange situation: there are clear (managed) methods to obtain screen resolution, but method for setting is absent. Is this feature very dangerous or complicated? Does any other crossplatform system (Parrot, RealBasic etc.) do this?

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  • naming a screen session in linux

    - by Aly
    Hi, I am running multiple screens from one ssh connection, when I list all of the screens via screen -ls the names are not very descriptive and when I have multiple screens it becomes hard to remember what is running on each. Does anyone know how to name these sessions (preferably when creating the screen). Thanks

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  • How to surpress screen savers on Linux?

    - by Die in Sente
    I need to prevent the screen saver from running while my application is running. I know how to do this on the Windows versions, with SendInput calls, but I need to do something similar for Linux ports. It looks complicated, because ideally, I'd like something that would work on multiple Linux distros (SuSe, Red Hat, Ubunutu...) and it looks like there are at least 3 different screen-saver frameworks: xscreensaver, gnome-screensaver, and something else in KDE.

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  • Detection screen disconnection in linux

    - by Dark Templer
    Hey Guys We have a nasty little problem. In short we can detect if a screen is connect when x11 boots (we do this by looking at the log - Xorg.0.log), but we are having trouble detect when are screen is disconnected while the machine is running (ie post x11 boot) Any one have any ideas? Cheers

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  • I am trying to use gnu screen on mac

    - by dorelal
    I have ~/.bash_profile which I would like to be invoked every single time a new GNU screen is created so that all my aliases work in GNU screen as they work in terminal. At this time this is what my ~/.screenrc looks like. hardstatus on hardstatus alwayslastline hardstatus string "%{.bW}%-w%{.rW}%n %t%{-}%+w %=%{..G} %H %{..Y} %m/%d %C%a "

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  • LWJGL Determining whether or not a polygon is on-screen.

    - by Brandon oubiub
    Not sure whether this is an LWJGL or math question. I want to check whether a shape is on-screen, so that I don't have to render it if it isn't. First of all, is there any simple way to do this that I am overlooking? Like some method or something that I haven't found? I'm going to assume there isn't. I tried using my trigonometry skills, but it is hard to do this because of how glRotate also distorts the image a little for perspective and realism. Or, is there any way to easily determine if a ray starting from the camera, and going outward in a straight line intersects a shape? (I can probably do it with my math skillz, but is there an easier way?) By the way, I can easily determine the angle at which the camera is facing around the x and y axis. EDIT: Or, possibly, I could get the angles of a vector from the camera to the object, and compare those angles to my camera angles. But I have a feeling that the distorts from glRotate and glTranslate would be an issue. I'll try it though.

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  • Trying to re-install ubuntu 11.10on an HP Pavillion G6, screen goes black after the ubuntu logo shows.How do I get it to install normally?

    - by Josh Towers
    Installed Ubuntu 11.1 successfully without my wireless device being recognized. Used sudo apt-get update + upgrade commands to attempt to fix this. Computer crashes after upgrade and now it won't finish re-installing Ubuntu, after it shows the first purple screen with the Ubuntu logo, the screen goes black. Used the Derik's Boot Nuke CD and then attempted re-installment again, and the black screen problem remains consistent, seemingly no matter what I do. It sounds like it's installing but won't let me see anything or go anywhere. heelllppp

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