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• Ubuntu 13.04 under Parallels Desktop - Black Desktop after X Windows Update

  - by Bob Reckhow

  I have been running Ubuntu 13.04 successfully on a MacBook Pro in a virtual machine in Parallels Desktop 9. Today (2013-10-17) after applying today's Ubuntu update, which included updates to X Windows, my Ubuntu 13.04 virtual machine launches, the launcher comes up, but the screen background is solid black, rather than the shaded orange colour of the default desktop background (and my desktop icons are "hidden behind this blackness", as well). I can launch applications from the launcher, and there is a very brief white flash on the screen, and then it returns to black. It's as if there is a "black blanket" covering the entire screen, so there is no way to interact with any application windows using the keyboard or mouse. The icons of the launcher are responsive to the mouse, so I can right-click and quit any application I have launched. But the rest of the screen is non-responsive to keyboard or mouse. This same behaviour happens with two different versions of Parallels Tools, so I am quite sure this is not a Parallels problem per se, although I could believe that it could be a paroblem with the interface between Parallels and this new updated X Windows code. Could anyone tell me what has happened, and how I might be able to fix this problem, so I can continue to use my Ubuntu 13.04 virtual machine? (I do have the option of reverting to a previous version of my virtual machine from before this update, but if possible I would prefer to keep my version of Ubuntu 13.04 up to date with the latest updates.) Thanks, Bob

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• how to get rid of light desktop manager entry in ubuntu greeter

  - by user205162

  Got "light desktop manager" entry in ubuntu greeter for some strange reason and can't get rid of it. As the current OS is Ubunu 13.10 the way to configure the lightdm greeter is rather strange, can't find any solution in greeter configs. More annoying thing is that Mr.LDM seems to have password very hard to guess so I can't login to this "account". Can you help me to find source of this problem and find the solution?

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• Slerping rotation mirrors

  - by Esa

  I rotate my game character to watch at the target using the following code: transform.rotation = Quaternion.Slerp(startQuaternion, lookQuaternion, turningNormalizer*turningSpeed/10f) startQuaternion is the character's current rotation when a new target is given. lookQuaternion is the direction the character should look at and it's set like this: destinationVector = currentWaypoint.transform.position - transform.position; lookQuaternion = Quaternion.LookRotation(destinationVector, Vector3.up); turningNormalizer is just Time.deltaTime incremented and turningSpeed is a static value given in the editor. The problem is that while the character turns as it should most of the time, it has problems when it has to do close to 180 degrees. Then it at times jitters and mirrors the rotation: In this poorly drawn image the character(on the right) starts to turn towards the circle on the left. Instead of just turning either through left or right it starts this "mirror dance": It starts to rotate towards the new facing Then it suddenly snaps to the same angle but on other side and keeps rotating It does this "mirroring" so long until it looks at the target. Is this a thing with quaternions, slerping/lerping or something else?

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• Unity3D problem. Bullets fall down instead of flying like they should

  - by user2342080

  I used this tutorial as a reference. http://www.youtube.com/watch?v=3L8eaoyZ0Go My problem is that whenever I play the game, EVERYTHING works but the bullets. It just falls down instead of flying forward. This is the flash version of the game: http://v1k.me/swf/ Can some one help me out? Should I upload the project? This is my "Shoot.js": public var bulletPrefab : Transform; public var bulletSpeed : float = 20; function Update() { if(Input.GetMouseButton(0)) { if(bulletPrefab || bulletSpeed) { var bulletCreate = Instantiate(bulletPrefab, GameObject.Find("SpawnPoint").transform.position, Quaternion.identity); bulletCreate.rigidbody.AddForce(transform.forward * bulletSpeed); } } }

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• Conky window jumps to the top

  - by Scott Severance

  Occasionally, my Conky window jumps to the top and covers all other windows. The only way to solve it is to kill and restart Conky. This happens at seemingly random times while using Compiz features. It seems especially common while using the scale plugin's window picker, but no plugin consistently causes this problem every time. I've seen several questions that appear related on the surface. However, all those questions are solved by ensuring that Conky starts after Compiz. In my case, my problems occur even if Conky starts after Compiz.

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• How can I reach over 100% volume with a keyboard shortcut?

  - by suli8

  sometimes the sound of videos isn't enough for me. so i reach the sound indicator , over sound preferences and change it to a level higher than 100%. the question is how can i do it from the keyboard? now i can control the volume from the keyboard but it's maximum is 100%. is there a way to do that? EDIT 1: how to use amixer to do it? (as Lyrositor suggested) EDIT2: the closest answer , as Jo-erland, suggested is to set a hotkey to bring up the gnome-volume-control, and then to use left and right arrows to change volume also beyond the 100% mark. any other suggestions, to make this 1 step only? is it possible to set a hotkey to do a sequence of commands ?

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• Picture lens doesn't find anything

  - by Han Cnx

  I get Facebook results, but nothing from my computer. If I open a terminal and use 'locate' then I can find stuff, but the picture lens is empty. Note that my picture files are on an NTFS partition. I have made a link named 'Pictures' in my home folder that points to the location where the picture files are. Again, this works with the 'locate' command and it also works for the Music lens, which is also a link in my home folder. It also (kinda) works for the Video lens, though it only wants to find videos I have opened, which seems not consistent with the other lenses. (and also not very useful this way)

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• incorrect work gnome terminal

  - by Flatline

  I use at work Ubuntu Desktop 12.04. 80% of the time I spend in the terminal. After switching from the putty on gnome terminal, I was unpleasantly surprised to work with some devices (eg Extereme Summit X650): gnome terminal: # Module lldp configuration. Press <SPACE> to continue or <Q> to quit: after press SPACE: # Module lldp configuration. Press <SPACE> to continue or <Q> to quit:[60;D# # # Module msdp configuration. # putty(Windows and Linux)/konsole # Module lldp configuration. Press <SPACE> to continue or <Q> to quit: after press SPACE: # Module lldp configuration. # # # Module msdp configuration. # How to fix the gnome terminal?

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• how to get the update manager window visible?

  - by Max Waterman

  I can see from the launcher that the Update Manager is running - it has the little triangle by it. However, I am having trouble seeing the window. If I click on it from one desktop, it switches to another, so I assume that the Update Manager has its window on that other desktop, but it still doesn't show anything. If I click alt-tab to switch between apps, I can see that the Update Manager is there, but selecting it just shows me a blank screen. Also, when I select it, while still holding the alt-key, I see the top menu bar switch to 'Update Manager', but when I release alt, it changes back to Ubuntu Desktop. It's almost like the app is off the screen somewhere, perhaps with just a single pixel showing or something like that. disclaimer: One thing that might be affecting things is that I have 'focus follows mouse' configured, which makes things a bit funky with the menu not being on the window, where it should be (perhaps there's a way to put it back with the window?) - I like to be able to type into background windows, and manually control which window is in the foreground.

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• Why is Lubuntu default desktop environment

  - by John

  So I just wanted to try things out on 14.04, so I did sudo apt-get install lxde sudo apt-get install lubuntu-desktop When I get to the greeter, it reads Lubuntu (Default) Lubuntu Netbook LXDE Openbox Ubuntu Why is Lubuntu default? I don't know if its because its the last thing I installed or if its because it is in alphabetical order. I'm tempted to test this theory by installing Xubuntu and see if it becomes default. I'd like it to read Ubuntu (Default) and have the Ubuntu splash instead. When I open lightdm.conf, there is no line "user-session" nor "greeter-session". They are missing. Is this normal and I have to add it manually?

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• How can I reach over 100% volume with a keyboard shortcut?

  - by suli8

  sometimes the sound of videos isn't enough for me. so i reach the sound indicator , over sound preferences and change it to a level higher than 100%. the question is how can i do it from the keyboard? now i can control the volume from the keyboard but it's maximum is 100%. is there a way to do that? EDIT 1: how to use amixer and scripts to do it? (as Lyrositor suggested) EDIT2: the closest answer , as Jo-erland, suggested is to set a hotkey to bring up the gnome-volume-control, and then to use left and right arrows to change volume also beyond the 100% mark. any other suggestions, to make this 1 step only? is it possible to set a hotkey to do a sequence of commands ?

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• Why is my arrow texture being drawn in odd places?

  - by tyjkenn

  This is a script I wrote that places an arrow on the screen, pointing to an enemy off-screen, or, if the enemy is on-screen, it places an arrow hovering above the enemy. Everything seems to work, except for some odd reason, I see random arrows floating around, often skewed and resized (which I really don't understand, because I only rotate and place in this script). Even when I only have one enemy in the scene, I still see these random arrows. It should only be drawing one per enemy. Note: when all enemies are removed, no arrows appear. var arrow : Texture; var cam : Camera; var dim : int = 30; function OnGUI() { var objects = GameObject.FindGameObjectsWithTag("Enemy"); for(var ob : GameObject in objects) { var pos = cam.WorldToViewportPoint(ob.transform.position); if(gameObject.GetComponent(FollowCamera).target != null){ var tar = gameObject.GetComponent(FollowCamera).target.parent; } if(pos.z>1 && ob.transform != tar){ var xDiff = (pos.x*cam.pixelWidth)-(cam.pixelWidth/2); var yDiff = (pos.y*cam.pixelHeight)-(cam.pixelHeight/2); var angle = Mathf.Rad2Deg*Mathf.Atan(yDiff/xDiff)+180; if(xDiff>0) angle += 180; var dist = Mathf.Sqrt(xDiff*xDiff + yDiff*yDiff); var slope = yDiff/xDiff; var camSlope = cam.pixelHeight/cam.pixelWidth; var theX = -1000.0; var theY = -1000.0; var mult = 0; var temp; if(Mathf.Abs(xDiff)>(cam.pixelWidth/2)||Mathf.Abs(yDiff)>(cam.pixelHeight/2)){ //touching right if(slope<camSlope && slope>-camSlope) { if(xDiff>(cam.pixelWidth/2)) { theX = cam.pixelWidth - (dim/2); mult = -1; }else if(xDiff<-(cam.pixelWidth/2)) { theX = (dim/2); mult = 1; } temp = ((cam.pixelWidth/2)*yDiff)/xDiff; theY =(cam.pixelHeight/2)+(mult*temp); } else{ if(yDiff>(cam.pixelHeight/2)) { theY = (dim/2); mult = 1; }else if(yDiff<-(cam.pixelHeight/2)) { theY = cam.pixelHeight - (dim/2); mult = -1; } temp = ((cam.pixelHeight/2)*xDiff)/yDiff; theX =(cam.pixelWidth/2)+(mult*temp); } } else { angle = -90; theX = (cam.pixelWidth/2)+xDiff; theY = (cam.pixelHeight/2)-yDiff-dim; } GUIUtility.RotateAroundPivot(-angle, Vector2(theX, theY)); Graphics.DrawTexture(Rect(theX-(dim/2),theY-(dim/2),dim,dim),arrow,null); GUIUtility.RotateAroundPivot(angle, Vector2(theX, theY)); } } }

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• Why are trees shining in background?

  - by Kinected

  Currently I am creating a forest scene in the dark, and the trees are shining far away, but when I get close they are fine. I have the shaders set to "Nature/Tree Soft Occlusion [bark/leaves]", but they are still rendering strange far away, but close they are fine. I tried placing the trees in a folder named "Ambient-Occlusion" like said here, but no luck. Also fog is turned off. Thanks in advance.

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• How to get a point to the left/right of a vector

  - by MulletDevil

  I have a position vector of a point in space and a quaternion for it's rotation. What i'm trying to calculate is a point too the left and a point to the right. I have the position and rotation(quaternion) of the red dot. What I want is to get the position of the green dots. I have a float value for the distance I want these points to be. With only the position and rotation is it possible to get a unit direction vector pointing left/right which I can multiply by my float value? Edit: I also know the original direction vector.

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• How do I disable mouse magnet on middle edge with multi monitors?

  - by piquadrat

  I use Ubuntu 12.04 on a two screen setup. Multiscreen on 12.04 has generally become much better, but there is one thing that really gets on my nerves: there's a mouse magnet of sorts on the middle edge (between the two screens). It's undoubtedly there to make it easier to interact with the launcher on the right screen. But I have enough trust in my mousing skills, the magnet is more annoying than helpful in my case. Can I disable it somehow?

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• Alt-Tab in 12.04 requires pressing Enter to select app, can I disable that?

  - by Brett Hoerner

  Alt+Tab quickly opens the switcher for me, but tabbing over to the next app and releasing the keys will just leave it selected, not switch to it. I have to press Enter to actually switch to the app. How do I make it automatically switch when I release like every other switcher out there? Same behavior occurs when using Super+Tab with either the Compiz Ring Switcher or Shift Switcher. This seems different from the 11.10 behavior.

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• How to modify the default position of desktop icons

  - by Hanynowsky

  Is it possible to modify the default desktop icons position so that icons move a little bit to right. If yes, how? As far as I know, there is no tweak for that in Nautilus. When I click "Organize Desktop by Name", the icons get aligned to the left of Desktop: that's fine, but they're too close to the launcher when it's in AUTO HIDE mode. So when Launcher is revealed, it comes over icons. Reproduce: Download some files from your browser or copy files/folders from a folder to the desktop, then these latter will be placed just like the screenshot. Their position is fine when the launcher is hidden, but when revealed, it hides a part of the icons. There is no problem when LAUNCHER AUTO-HIDE MODE is disabled. Thanks in advance.

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• JetBrains dévoile enfin son projet open source Nitra, un framework pour faciliter la vie des développeurs

  JetBrains dévoile enfin son projet open source Nitra Un framework pour faciliter la vie des développeursVoilà plusieurs mois que JetBrains, entreprise spécialisée dans l'édition de logiciels destinés aux développeurs, a annoncé le lancement de son projet Nitra dont les contours semblent très prometteurs.Aujourd'hui, JetBrains est fier d'annoncer la publication de la première version de Nitra en open source sous licence BSD, après plusieurs mois de développement pour offrir la meilleure expérience...

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• Ubuntu 12.04 is slow and unresponsive

  - by Bharat

  My laptop works perfectly fast with Windows 7 but is very slow in Ubuntu 12.04.When I try to open the dash it takes 1-2 sec.even the normal right click on the desktop for the dropdown options is taking time.I installed preload but it made a very slight change. Everything is up to date. My laptop is : Lenovo ideapad Z560 500 GB hard drive (dual booting win7 and Ubuntu 12.04) 3 GB RAM Intel® Core™ i3 CPU M 370 @ 2.40GHz × 4 processor Nvidia GeForce 310M/PCIe/SSE2 Ubuntu 32 bit any help?

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• Can I run Ubuntu Live from a USB flash-drive without destroying the data on it?

  - by Lucian

  I already have a number of files on a flash drive (8 gb) that I would prefer to keep, but I would like to try Ubuntu even if merely for the aesthetics. I use Windows XP. I know that it's definitely possible to run Ubuntu from a bootable drive like my flash drive to try Ubuntu but I would much rather keep my files intact not only on my flash drive but also my hard drive, if that's possible. I also want to know if it's entirely possible that while running Ubuntu from the USB if I can switch back to Windows while my computer is still on. If I'm missing something, please let me know. I'm very grateful for any assistance in this matter.

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• Ease Rotate RigidBody2D toward arbitrary angle

  - by Plastic Sturgeon

  I'm trying to make a rigidbody2D circle return to an orientation after a collision. But there is a weird behavior I do not expect - it always orients to the same direction. This is what I call in FixedUpdate(): rotationdifference = -halfPI + rigidbody2D.rotation; rigidbody2D.AddTorque (rotationdifference * ease); I would expect this would rotate 90 degrees (1/2 Pi Radians) off of the neutral axis. But it does not. In fact it performs exactly the same as: rotationdifference = rigidbody2D.rotation; rigidbody2D.AddTorque (rotationdifference * ease); What is going on? How would I be able to set an angle I want it to ease towards, and then have it ease towards it when its not colliding with some other force?

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• Rotate camera around player and set new forward directions

  - by Samurai Fox

  I have a 3rd person camera which can rotate around the player. When I look at the back of the player and press forward, player goes forward. Then I rotate 360 around the player and "forward direction" is tilted for 90 degrees. So every 360 turn there is 90 degrees of direction change. For example when camera is facing the right side of the player, when I press button to move forward, I want player to turn to the left and make that the "new forward". I have Player object with Camera as child object. Camera object has Camera script. Inside Camera script there are Player and Camera classes. Player object itself, has Input Controller. Also I'm making this script for joystick/ controller primarily. My camera script so far: using UnityEngine; using System.Collections; public class CameraScript : MonoBehaviour { public GameObject Target; public float RotateSpeed = 10, FollowDistance = 20, FollowHeight = 10; float RotateSpeedPerTime, DesiredRotationAngle, DesiredHeight, CurrentRotationAngle, CurrentHeight, Yaw, Pitch; Quaternion CurrentRotation; void LateUpdate() { RotateSpeedPerTime = RotateSpeed * Time.deltaTime; DesiredRotationAngle = Target.transform.eulerAngles.y; DesiredHeight = Target.transform.position.y + FollowHeight; CurrentRotationAngle = transform.eulerAngles.y; CurrentHeight = transform.position.y; CurrentRotationAngle = Mathf.LerpAngle(CurrentRotationAngle, DesiredRotationAngle, 0); CurrentHeight = Mathf.Lerp(CurrentHeight, DesiredHeight, 0); CurrentRotation = Quaternion.Euler(0, CurrentRotationAngle, 0); transform.position = Target.transform.position; transform.position -= CurrentRotation * Vector3.forward * FollowDistance; transform.position = new Vector3(transform.position.x, CurrentHeight, transform.position.z); Yaw = Input.GetAxis("Right Horizontal") * RotateSpeedPerTime; Pitch = Input.GetAxis("Right Vertical") * RotateSpeedPerTime; transform.Translate(new Vector3(Yaw, -Pitch, 0)); transform.position = new Vector3(transform.position.x, transform.position.y, transform.position.z); transform.LookAt(Target.transform); } }

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• Top down space game control problem

  - by Phil

  As the title suggests I'm developing a top down space game. I'm not looking to use newtonian physics with the player controlled ship. I'm trying to achieve a control scheme somewhat similar to that of FlatSpace 2 (awesome game). I can't figure out how to achieve this feeling with keyboard controls as opposed to mouse controls though. Any suggestions? I'm using Unity3d and C# or javaScript (unityScript or whatever is the correct term) works fine if you want to drop some code examples. Edit: Of course I should describe FlatSpace 2's control scheme, sorry. You hold the mouse button down and move the mouse in the direction you want the ship to move in. But it's not the controls I don't know how to do but rather the feeling of a mix of driving a car and flying an aircraft. It's really well made. Youtube link: FlatSpace2 on iPhone I'm not developing an iPhone game but the video shows the principle of the movement style. Edit 2 As there seems to be a slight interest, I'll post the version of the code I've used to continue. It works good enough. Sometimes good enough is sufficient! using UnityEngine; using System.Collections; public class ShipMovement : MonoBehaviour { public float directionModifier; float shipRotationAngle; public float shipRotationSpeed = 0; public double thrustModifier; public double accelerationModifier; public double shipBaseAcceleration = 0; public Vector2 directionVector; public Vector2 accelerationVector = new Vector2(0,0); public Vector2 frictionVector = new Vector2(0,0); public int shipFriction = 0; public Vector2 shipSpeedVector; public Vector2 shipPositionVector; public Vector2 speedCap = new Vector2(0,0); void Update() { directionModifier = -Input.GetAxis("Horizontal"); shipRotationAngle += ( shipRotationSpeed * directionModifier ) * Time.deltaTime; thrustModifier = Input.GetAxis("Vertical"); accelerationModifier = ( ( shipBaseAcceleration * thrustModifier ) ) * Time.deltaTime; directionVector = new Vector2( Mathf.Cos(shipRotationAngle ), Mathf.Sin(shipRotationAngle) ); //accelerationVector = Vector2(directionVector.x * System.Convert.ToDouble(accelerationModifier), directionVector.y * System.Convert.ToDouble(accelerationModifier)); accelerationVector.x = directionVector.x * (float)accelerationModifier; accelerationVector.y = directionVector.y * (float)accelerationModifier; // Set friction based on how "floaty" controls you want shipSpeedVector.x *= 0.9f; //Use a variable here shipSpeedVector.y *= 0.9f; //<-- as well shipSpeedVector += accelerationVector; shipPositionVector += shipSpeedVector; gameObject.transform.position = new Vector3(shipPositionVector.x, 0, shipPositionVector.y); } }

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• Referenced assemblies of a .NET Framework 2.0-based 32-bit application are loaded multiple times

  981266 ... Referenced assemblies of a .NET Framework 2.0-based 32-bit application are loaded multiple timesThis RSS feed provided by kbAlerz.com.Visit kbAlertz.com to subscribe. It's 100% free and you'll be able to recieve e-mail or RSS updates for the technologies you pick from the Microsoft Knowledge Base....Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• How do I access the system tray?

  - by Jon

  So I'm messing around with Natty a little, and I noticed that all the apps that would normally use the system tray (or "notification area"?) aren't displaying there. Is that a bug, or is that the way it's going to be? I heard something about Ubuntu getting rid of that feature entirely. Is there a way to add it back? I mean, I didn't really like it, either, especially when there were apps that used it unnecessarily, but I can't use CryptKeeper at all now, or easycrypt, and I don't know whether Dropbox has synced without opening Nautilus.

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