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  • Couldn't pass the signin screen

    - by Amokrane
    I have an issue here with my computer using ubuntu 10.10 on a 64 bits machine. When I start it, I have the login screen, I enter my credentials but instead of starting the session it reloads the login screen again. I checked the disc using fsck and it seems clean. How should I proceed to diagnose and repair this issue? Thanks! [Edit] I went to the log files, this is what I got: auth.log pam_unix (gdm:session): session opened for user amokrane by (uid=0) pam_ck_connector (gdm:session): nox11 mode, ignoring PAM_TTY :0 pam_unix (gdm:session) :session closed for user amokrane messages.log No ACPI video bus found I also took a shot with my camera of the black screen that appears between the two login screens, it says something like: fsck from util-linux-ng 2.17.2 /dev/sdc4 : propre, xxxx files, xxxx blocs Starting AppArmor profiles Skipping profiles in /etc/apparmor.d/disable: usr.bin.firefox Setting sensors limits Starting postgreSQL ... /var/log/Xorg.0.log [ 25.375] (II) intel(0): Modeline "1920x1080"x60.0 172.80 ... [ 28.850] (II) Power Button: Close [ 28.850] (II) UnloadModule: "evdev" [ 29.910] (II) Power Button: Close [ 28.910] (II) UnloadModule: "evdev" [ 28.941] (II) AT Translated Set 2 keyboard: Close [ 29.000] (II) ImPS/2 Generic Wheel Mouse: Close [ 29.000] (II) UnloadModule: "evdev" [ 29.039] ddxSigGiveUp: Closing log Update I tried the following: Ctrl-Alt-F1 on the login screen (to runt the console). sudo pkill startx sudo rm /tmp/.X0-locl startx But it tells me that the x server is already running.

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  • Screen space to world space

    - by user13414
    I am writing a 2D game where my game world has x axis running left to right, y axis running top to bottom, and z axis out of the screen: Whilst my game world is top-down, the game is rendered on a slight tilt: I'm working on projecting from world space to screen space, and vice-versa. I have the former working as follows: var viewport = new Viewport(0, 0, this.ScreenWidth, this.ScreenHeight); var screenPoint = viewport.Project(worldPoint.NegateY(), this.ProjectionMatrix, this.ViewMatrix, this.WorldMatrix); The NegateY() extension method does exactly what it sounds like, since XNA's y axis runs bottom to top instead of top to bottom. The screenshot above shows this all working. Basically, I have a bunch of points in 3D space that I then render in screen space. I can modify camera properties in real time and see it animate to the new position. Obviously my actual game will use sprites rather than points and the camera position will be fixed, but I'm just trying to get all the math in place before getting to that. Now, I am trying to convert back the other way. That is, given an x and y point in screen space above, determine the corresponding point in world space. So if I point the cursor at, say, the bottom-left of the green trapezoid, I want to get a world space reading of (0, 480). The z coordinate is irrelevant. Or, rather, the z coordinate will always be zero when mapping back to world space. Essentially, I want to implement this method signature: public Vector2 ScreenPointToWorld(Vector2 point) I've tried several things to get this working but am just having no luck. My latest thinking is that I need to call Viewport.Unproject twice with differing near/far z values, calculate the resultant Ray, normalize it, then calculate the intersection of the Ray with a Plane that basically represents ground-level of my world. However, I got stuck on the last step and wasn't sure whether I was over-complicating things. Can anyone point me in the right direction on how to achieve this?

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  • Making sense of the Game State manager tutorial?

    - by Johnny Quest
    I have come across the Game State Managemnet tutorial at http://create.msdn.com/en-US/education/catalog/sample/game_state_management because I thought this would be a good place to start a game off. I have added a new screen, but I am still a bit lost on how everything works. When I make my game, do I only need one more additional screen? just for gameplay? or should I have a different screen for each level?

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  • How to Disable the Animations on the Windows 8 Start Screen

    - by Usman
    Who doesn’t love animations? They make everything look so cool. But in some cases, animations are a distraction, and the same is true for Windows 8′s start screen (the “Modern UI”). Fortunately, there’s a very simple way to disable all those animations. Keep reading to find out how it’s done. The animations are especially noticeable when you switch from the good ol’ peaceful desktop to the start screen by pressing the winkey. I don’t know about you, but it feels like I’m getting dizzy by watching all those crazy animations over and over again. People have found out ways to enhance the start screen animations, add delay to various elements and stuff like that. But we’re going the other way, disabling the animations completely. To do so, log in, and when the start screen appears, type “Computer” (it will pop up in the search results before you’ve even finished typing). Our Geek Trivia App for Windows 8 is Now Available Everywhere How To Boot Your Android Phone or Tablet Into Safe Mode HTG Explains: Does Your Android Phone Need an Antivirus?

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  • frame lock networking

    - by kochol
    I'm developing an RTS game and I want to add multiplayer support to my game. I picked the easiest technique to implement for start frame locking technique. I used server client networking architecture (I think it's my first mistake I think using peer to peer is a better one for this) On game update every clients send their commands and maybe receive some command then render the frame and wait for all clients to send their update complete message then all of them can go for the next frame. I send commands and all logic is calculated on the clients based on commands but the clients can go out of sync easily. Every AI controlled units make different decisions on each clients What I have to do to sync my game? Do you suggest me a better network architecture or technique?

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  • Naming Convention for Dedicated Thread Locking objects

    - by Chris Sinclair
    A relatively minor question, but I haven't been able to find official documentation or even blog opinion/discussions on it. Simply put: when I have a private object whose sole purpose is to serve for private lock, what do I name that object? class MyClass { private object LockingObject = new object(); void DoSomething() { lock(LockingObject) { //do something } } } What should we name LockingObject here? Also consider not just the name of the variable but how it looks in-code when locking. I've seen various examples, but seemingly no solid go-to advice: Plenty of usages of SyncRoot (and variations such as _syncRoot). Code Sample: lock(SyncRoot), lock(_syncRoot) This appears to be influenced by VB's equivalent SyncLock statement, the SyncRoot property that exists on some of the ICollection classes and part of some kind of SyncRoot design pattern (which arguably is a bad idea) Being in a C# context, not sure if I'd want to have a VBish naming. Even worse, in VB naming the variable the same as the keyword. Not sure if this would be a source of confusion or not. thisLock and lockThis from the MSDN articles: C# lock Statement, VB SyncLock Statement Code Sample: lock(thisLock), lock(lockThis) Not sure if these were named minimally purely for the example or not Kind of weird if we're using this within a static class/method. Several usages of PadLock (of varying casing) Code Sample: lock(PadLock), lock(padlock) Not bad, but my only beef is it unsurprisingly invokes the image of a physical "padlock" which I tend to not associate with the abstract threading concept. Naming the lock based on what it's intending to lock Code Sample: lock(messagesLock), lock(DictionaryLock), lock(commandQueueLock) In the VB SyncRoot MSDN page example, it has a simpleMessageList example with a private messagesLock object I don't think it's a good idea to name the lock against the type you're locking around ("DictionaryLock") as that's an implementation detail that may change. I prefer naming around the concept/object you're locking ("messagesLock" or "commandQueueLock") Interestingly, I very rarely see this naming convention for locking objects in code samples online or on StackOverflow. Question: What's your opinion generally about naming private locking objects? Recently, I've started naming them ThreadLock (so kinda like option 3), but I'm finding myself questioning that name. I'm frequently using this locking pattern (in the code sample provided above) throughout my applications so I thought it might make sense to get a more professional opinion/discussion about a solid naming convention for them. Thanks!

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  • ScreenManagement better practices ?! Textbox not focusing

    - by xykudyax
    I saw a question here using DataTemplates with WPF for ScreenManagement, I was curious and I gave it a try I think the ideia is amazing and very clean. Though I'm new to WPF and I read a lot of times that almost everything should be made in XAML and very little should be "coded behind". My questions resolves about using the datatemplate ideia, WHERE should the code that calls the transitions be? where should I define which commands are avaiable in which screens. For example: [ScreenA] Commands: Pressing B - Goes to state B Pressing ESC - Exits [ScreenB] Commands: Pressing A - Goes to state A Pressing SPACE - Exits where do I define the keyEventHandlers? and where do I call the next screen? I'm doing this as an hobby for learning and "if you are learning, better learn it right" :) Thank you for your time. Yes the Q/A I was talking is: What's a good way to handle game screen management in WPF? What I've done so far was to create a Screen class (derived from UserControl) and create some virtual methods: - one for Initializing stuff (like focus a given component by default) - another for inputHandling I handle it by using a switch case and by listening to the PreviewKeyDown event from the parent container (MainWindow) Im not able to do it another way! Help?!. - and a finally one that removes the keyEvent method (when the screen is terminated) Parent.PreviewKeyDown -= OnKeyDown; am I doing okay? I face a problem. When I add a new screen (userControl) containing a TextBox I'm not able to give it autofocus :/ The Caret is there but is not blinking and I have to hit "TAB" before being able to input anything at all :/

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  • Ubuntu 12.10 boots to purple or black screen but intermittently boots fine

    - by Nic
    I have a fresh install of Ubuntu 12.10 64bit dual booting with Win7 64bit. Windows boots fine every time. When I choose Ubuntu from Grub2 menu it will sometimes boot just fine. Most of the times though it gets stuck at a purple screen with nothing happening and no keys or key combinations working. Other times instead of the purple screen I get a black screen with a flashing cursor at the top. Nothing happens. I need to hold down the power button to restart and after a couple times of trying it will eventually boot into Ubuntu. Once that happens everything runs without any problems. I have tried different approaches to fix the problem but to no avail. I tried removing "quiet splash", used no splash, and nomodeset What I got from this was seeing all the text of the boot process but more often than not the process gets stuck right after recognizing all the USB ports and devices. If it gets stuck nothing happens (except when i plug in a usb device: it still recognizes it with a new line of text) In the case when the boot process works, after it lists the usb devices it tells me something like: recovery of read-only filesystem necessary. (its the filesystem that ubuntu runs on) then it does the recovery and i get: recovery complete. after that Ubuntu will boot properly and I get to see the login screen. I have no idea what to do to fix that problem. I have to reboot 3 to 5 times everytime I want to get into Ubuntu and I feel like I'm breaking my new Laptop. (its a lenovo ideapad z580 btw. i5 processor and nvidia gtx640 graphics card) I hope someone can help me. Thanks. Edit: i just got a "failed to enable AA error" message when waking it up from suspend. I don't know if that helps or has anything to do with the boot probs.

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  • How do I improve my screen resolution in Windows Remote Desktop?

    - by Jeff
    I'm RDP'ing into a Win2K3 machine from a WinXP machine, and I cannot stand the low screen resolution I get on the Win2K3 box. Text is too large and the graphics/colors aren't very smooth. How do I improve this? If I right-click on the desktop of the remote machine and go to Properties - Settings, I see that the screen resolution is set to 1280x1024 (should be okay, I would think), and the color quality is Medium (16 bit) (not optimal) and I don't have the option to change either setting (because they're set in the .rdp file for the session, right?). If I move over to the Appearance tab, I see that font size is set to Normal, with no option to make it smaller. The thing is, these settings are close to what I have on the XP machine I'm RDP'ing in from. The only difference (in those settings) is the color quality, which is 32 bit. Any ideas on how I can improve the situation? Other tidbits: The graphics card on the Win2K3 machine is ATI ES1000. I think I have the latest drivers for it. I'm running VMware Workstation on the Win2K3 machine, and if I create a Win2K3 VM and RDP into it from the XP machine, the resolution is just fine.

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  • compatible laptop screens for dv6-1050us

    - by eran
    i have a laptop with 16'' wide screen, but the screen is broken and i want to buy only the screen and replace it.. my laptop is: HP Pavilion dv6-1050us what i know about the screen is that it's model number 512357-001 "16inch widescreen BrightView BV display panel IMR, with web camera and microphone". I did find some screen which seems to be the one but i'm not sure and dont want to spend money for the wrong screen, can any one help please? I search on e-bay for a compatible screen and left with a few questions.. There are some sceens which can be compatible.. they dont mention the specific computer models compatibles.. is all dv6-1000 of hp has the same screen?are all of them compatible? thanks for you help Eran

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  • LibreOffice Writer Error due to a lock file

    - by Brad
    Every time I try to open a word document I get this error. LibreOffice 3.5 Either another instance of LibreOffice is accessing your personal settings or your personal settings are locked. Simultaneous access can lead to inconsistencies in your personal settings. Before continuing, you should make sure user "closes LibreOffice on host". Do you want to continue? I've been onto different forums to find out a remedy but nothing yet. I've recently done a fresh install of 12.04 (64bit) and have been having some issues with different programs and have been able to work through most of them but this one, I'm lost.

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  • ScreenShare: command line and observe only.

    - by Shyam
    Hi, I have a wide TV screen that is attached to a Mac Mini. I am able to use this screen as a second screen using an application like ScreenRecycler. However, Sometimes I want to demonstrate what I am doing on my box on this TV screen. As this TV is attached to a Mac Mini, I want to have a screen sharing done reversed. As I know screen share can be done in observe mode and full screen, this would be more than sufficient. Because it would be pretty useless to run it continuously, I want it on demand. For this, I want to use SSH. So the only thing I would like to know is, how do I start screen sharing in from a Terminal Session. On Windows, I could start an application by using "start notepad.exe", I am looking for something similar. Eventually, I want to make this work on other boxes too. Thanks for your help!

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  • Unity Greeter login screen cuts off login options

    - by ammianus
    I have a pretty newly installed Ubuntu 12.04, using Unity. My external monitor is 1920x1080 max resolution. In the Unity desktop itself everything looks great. I have an NVidia graphics card. When I start my computer and get to the Unity greeter login screen the display is oddly formatted and the resolution seems off. It looks like a zoomed view on the larger 1920x1080 screen. As such it crops the login options off to the left hand side of the screen. So I can only just see the edge of the password box for the user I want to log in with. I can log in with one account by default by blindly typing the password, but I am unable to switch to other accounts. Is there anything I can do to fix the log in screen display so that I can see the normal login options? Note: I first noticed it when I changed my desktop background and the next time I logged in I saw the issue.

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  • Simple monitoring of a Raspberry Pi powered screen - Part 2

    - by Chris Houston
    If you have read my previous blog post Raspberry Pi entrance signed backed by Umbraco - Part 1 which describes how we used a Raspberry Pi to drive an Entrance sign for QV Offices you will have seen I mentioned a follow up post about monitoring the sign.As the sign is mounted in the entrance of the building on the ground floor and the reception is on the 1st floor, this meant that if there was a fault of any kind showing on the screen, the first person to see this was inevitably one of QV Offices' clients as they walked into the building.Although the QV Offices' team were able to check the Umbraco website address that the sign uses, this did not always mean that everything was working as expected. We noticed a couple of times that the sign had Wifi issues (it is now hard wired) and this caused the Chromium browser to render a 404 error when it tried to refresh the screen.The simple monitoring solutionWe added the following line to our refresh script, so that after the sign had been refreshed a screen shot of the Raspberry Pi would be taken:import -display :0 -window root ~/screenshot.jpgFinally we wrote a small Crontab task that ran on a QV Offices Mac that grabs this screen shot and saved it on the desktop, admittedly we have used a package that it not mega secure, but in reality this is an internal system that only runs an office sign, so we are not to concerned about it being hacked.*/5 * * * * /usr/local/bin/sshpass -p 'password' /usr/bin/scp [email protected]:screenshot.jpg Desktop/QVScreenShot.jpgAs the file icon updates, if the image changes, this gives a quick visual indication of the status of the sign, if for some reason the icon does not look correct the QV Offices administrator can just click on the file to see the exact image currently displayed on the sign.Sometimes a quick and easy solution is better than a more complex and expensive one.

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  • Blank Screen after inactive time

    - by Hari K T
    I am using Ubuntu 11.04 , on a DELL Vostro 1510. If I am inactive for a certain time, the screen usually gets locked and the login prompt will be there. Yes sometimes I am able to see the login screen and logging in as normal. But sometimes after its locked and when the mouse or keyboard is moved also nothing happens. This is happening for the second time. And its not happening always . I can switch from one terminal to other from the locked screen with Alt + + Ctrl F1 etc . But when I switch to the graphical one with Alt + Ctrl + F7 ( from the locked time ) I can see only a blank screen. I tried once login in ( Alt + Ctrl + F1 ) and trying to startx, but it said something was locked and want to delete the lock and try. So I removed don't remember what exactly it was . But it too was not a success , I was forced to press the powerbutton. Is this a bug ? I saw some but all are happening for switching users. Never experienced after logging out, but this happens only when its locked automatically actually. Update : I strongly feel this is a Bug. As I upgraded to 11.10 , I didn't noticed the same issues. But at some point if any one has an answer, you can post it. I can approve.

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  • Change X settings to boot into laptop with non working screen using an external monitor

    - by dassouki
    My laptop committed suicide. Is there a way I can boot into my ubuntu using an external screen? Ubuntu 10.10 video: Nvidia 9500 gm i think I can get dual screen upto and until the ubuntu login screen at which point it goes back into laptop display only. Then I can just type and enter my password. The system (i assume boots into ubuntu) but I got no way of going onto the x or nvidia settings to change my display to external monitor EDIT well I booted into terminal using control shift F1 i think, and now I'm trying to reporgram x.org, but strangely it seems bland with not a lot of settings in it EDIT 2 xrandr returns "Can't open display" EDit 3 after some messing around with xrandr and xinit ... my x.org only displays one monitor instead of two in its settings although both, i.e. the laptop and external screens are both connected. EDIT 4 it seems that x.org now has a "screen" and "monitor" section, I can't seem to be able to boot linux into monitor. I get a "Monitor is not a valid keyword" in this subsection

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  • Setting Krypton Light to Screen Pixels

    - by Adam Jerrett
    So a few days back, I started playing around with Krypton XNA for 2D lighting in my game. I noticed in general, that spawning a light at (0,0) with Krypton causes the light to appear in, pretty much, the centre of the game screen. Is there any way to change this so a Krypton light's "starting point" at [0,0] would spawn at the top left of the screen, and thus follow the standard screen co-ordinates for position? I ask because currently I'm busy working on my game where my spawn point is [512,512]. With hard code, the closest I've got to the light being "central" to this point is the vector position [12,-20], which makes no sense and is impossible to craft, mathematically, if I want the light to move with the camera (the position [480,512] maps roughly to [10,-20]). So, is there any way to "normalise" the krypton lights to use standard screen co-ordinates? If you guys can, play around with the demo from the site and please see if you can find anything out about it. Documentation on the engine is rather scarce, so it's difficult to find anything relevant to my "pixel-perfect" need. It might just also be something in the code with regards to the matrices that I'm not fully understanding. Any help would be useful. Thanks.

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  • 2560 x 1600 screen resolution not available when a second monitor is attached.

    - by sgmoore
    I am running Windows 7 (64-bit edition) and have a 30" Dell 3007WFP monitor which runs at a screen resolution of 2560 x 1600. This works perfectly until I try to connect a second monitor, and then the screen resolution on the main monitor immediately drops to 1280x800 and I can't change it back up to the correct resolution until I disconnect the second monitor. The graphics card is a Nvidia Quadro FX 370. This has a dual link DVI connector (to which the 30" is connected) and a single link DVI connector. The second monitor can run at 1920x1080 and is connected using a VGA to DVI connector. Note, it does not seem to matter whether the second monitor is running at 1920x1080 or even at 800x600. Windows reports Total Available Graphics Memory: 3839MB Dedicated Video Memory: 256MB System Video Memory: 0MB Shared System Memory: 3583MB Does anyone know if this a limitation with the video card, memory, drivers, connectors or something else? If this is a limitation with the video card, can anyone recommend a PCI Express 16 card that would support at least this setup, but preferably support two 30" monitors both running 2560 x 1600. (I'm not into gaming etc, so it doesn't need to be very powerful)

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  • dual monitors and unity - ati radeon cards

    - by michiel
    I have a vaio laptop with an ATI Radeon video card and an external screen. I used to run dual monitors on Ubuntu 10.10 fine, but recently decided to upgrade to 11.10 via 11.04 I don't think it's the video card or the fglrx driver. It seems to be unity. When I start up, the laptop screen is normal and the external screen is all white, although I can move my mouse over it. However, the cursor becomes the big X that used to be cursor of the first versions of Xwindows. I can right click on it, and it brings up the context menu for the desktop. And then, all of a sudden, it shows my desktop background. I can continue to move my mouse over the external screen, and now the cursor is normal (little white arrow). But I can't do anything any longer (not even the context menu as before), and trying to drag a window to it (which always worked on 10.10) doesn't work. I actually really like unity. It gives me the most our of my desktop, and uses all space available, which is great. But how can I get my second screen back? I tried unity 2D, but the result is the same. Edit: I think I stumbled on this bug: https://bugs.launchpad.net/ubuntu/+source/nvidia-settings/+bug/882143

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  • Greeter login screen cropped login options in 12.04

    - by ammianus
    I have a pretty newly installed Ubuntu 12.04, using Unity. My external monitor is 1920x1080 max resolution. In the Unity desktop itself everything looks great. I have an NVidia graphics card. When I start my computer and get to the Unity greeter login screen the display is oddly formatted and the resolution seems off. It looks like a zoomed view on the larger 1920x1080 screen. As such it crops the login options off to the left hand side of the screen. So I can only just see the edge of the password box for the user I want to log in with. I can log in with one account by default by blindly typing the password, but I am unable to switch to other accounts. Is there anything I can do to fix the log in screen display so that I can see the normal login options? Note: I first noticed it when I changed my desktop background and the next time I logged in I saw the issue.

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  • How to Lock Down IE 10 by Disabling Flash in Windows 8

    - by Taylor Gibb
    Microsoft now includes Flash along with their Internet Explorer browser in Windows 8. Flash has been known as a big culprit when it comes to security vulnerabilities in the past, so here’s how to disable it. Note: We have outlined two methods for achieving the same goal, there is no need to do both. HTG Explains: What Is RSS and How Can I Benefit From Using It? HTG Explains: Why You Only Have to Wipe a Disk Once to Erase It HTG Explains: Learn How Websites Are Tracking You Online

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