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• Blank desktop after login

  - by Alex

  Today my 14.04 updated itself not requiring a reboot. After a while I rebooted because of other reasons and then I was pleasantly surprised by a blank screen. I have tried everything I could think about including Reinstalled compiz, unity, ubuntu-desktop, xorg Reinstalled and then removed the nvidia driver So far nothing has worked. Except for one little thing: my cairo-dock is showing. And that's all. I tried with Unity doesn't load, no Launcher, no Dash appears, but none of the answers there helped me. I also tried removing my ~/.Xauthority file and it still doesn't work. Does anybody know what else I could try? UPDATE: sudo dpkg-reconfigure xserver-xorg sudo service lightdm stop sudo service lightdm start When I run that code and then login again the icons on the desktop are displayed but the menu and the launcher are still not there. Also, when I try to run an application from CTRL + ALT + F1 such as dconf reset -f /org/compiz/ it says Cannot autolaunch D-Bus without X11 $DISPLAY I can only run applications with export DISPLAY=:0

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• 3D array in a 2D array

  - by Smallbro

  Currently I've been using a 3D array for my tiles in a 2D world but the 3D side comes in when moving down into caves and whatnot. Now this is not memory efficient and I switched over to a 2D array and can now have much larger maps. The only issue I'm having now is that it seems that my tiles cannot occupy the same space as a tile on the same z level. My current structure means that each block has its own z variable. This is what it used to look like: map.blockData[x][y][z] = new Block(); however now it works like this map.blockData[x][y] = new Block(z); I'm not sure why but if I decide to use the same space on say the floor below it wont allow me to. Does anyone have any ideas on how I can add a z-axis to my 2D array? I'm using java but I reckon the concept carries across different languages.

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• Error when trying to install Menulibre in Lubuntu 12.10 [closed]

  - by cipricus

  Possible Duplicate: How can I fix a 404 Error using a PPA? When trying to add a PPA (to install menulibre) I get these errors: Err http://ppa.launchpad.net quantal/main Sources 404 Not Found Err http://ppa.launchpad.net quantal/main i386 Packages 404 Not Found W: Failed to fetch http://ppa.launchpad.net/menulibre-dev/devel/ubuntu/dists/quantal/main/source/Sources 404 Not Found W: Failed to fetch http://ppa.launchpad.net/menulibre-dev/devel/ubuntu/dists/quantal/main/binary-i386/Packages 404 Not Found Why is that and how to solve it? As the question was flagged as duplicate: I should clarify that I want to know why i cannot add a source that seems active in launchpad, and how could i add it and install the program, not just how to remove the error by removing the source in the software sources list Menulibre seems available in software sources. Why can't I install it? I'm in Lubuntu 12.10

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• How do you adjust screen brightness on Acer laptop?

  - by Noobatlife

  I have an Acer Aspire one 5742 laptop. I installed Linux Ubuntu 12.10 on it. I have one problem with it. no matter how I press the Fn+ up or Fn + down keys I cannot adjust the Screen Brightness. It is at its maximum brightness and this drains the laptop battery. I did some googling and found out that you needed to change some settings in the grub file but I don't know exactly what to do. Can anyone help me?

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• CPU not working on a specific motherboard

  - by Shaman

  I'm making a computer for someone and I met a weird problem. The CPU that I have doesn't work on this motherboard. The CPU is an Intel Pentium D 925 and the motherboard is an ECS G41T-M6, which in theory should work together. The only thing reused is the power source(400W). When I start the computer, the fans start, and that's it. The BIOS doesn't boot. I tried my own power source (600W Corsair) and nothing. Removed the RAM, no warning. In desperation I tried the last thing, swaped my own CPU with this one (Core2Duo E7200). Lo and behold, it worked. Both. The Core2Duo worked on the ECS with the old power source and the RAM that I used in the first place, and the Pentium D worked on my Gigabyte G31M-ES2L. What I discovered was that the Pentium D didn't receive power on the ECS, because I tried running it without the cooler and it remained at room temperature. On a side note, I also removed the HDDs just in case. So, in conclusion, any ideas? I can't return it, and I can still use it to upgrade another PC, but I would really prefer not to buy another CPU if possible.

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• Get Matrox Millenium video card working in Ubuntu 9.10

  - by wcoenen

  I have installed Ubuntu 9.10 on an old PC and it is mostly working, except for some heavy drawing defects that show up whenever I start dragging a window or scrolling inside a window or menu. It looks like the video driver copies the rectangle being moved to the wrong location. I have taken a look in /var/log/Xorg.0.log and the following line shows the detected video card: (--) PCI:*(0:0:8:0) 102b:0519:0000:0000 Matrox Graphics, Inc. MGA 2064W [Millennium] rev 1, Mem@ 0xf9800000/16384, 0xfb000000/8388608, BIOS @0x????????/65536 (==) Using default built-in configuration (30 lines) (==) --- Start of built-in configuration --- Section "Device" Identifier "Builtin Default mga Device 0" Driver "mga" EndSection How do I fix the drawing defects? It turned out that the 24 bit color depth (automatically selected by ubuntu 9.10) was the problem; apparantly the mga driver doesn't handle this well for cards with little memory. I took the following steps to resolve the issue (you can skip the first three steps if you already have a semi-working xorg.conf file): Reboot ubuntu in recovery mode, to get a root console without X running. Run Xorg -configure to generate a xorg.conf.new file Copy the file to /etc/X11/xorg.conf with cp xorg.conf.new /etc/X11/xorg.conf (assuming it didn't exist yet; that's why I generated it) Open the new config file with sudo nano /etc/X11/xorg.conf and make sure the screen section is configured for 16 bit color depth like this: Section "Screen" Identifier "Screen0" Device "Card0" Monitor "Monitor0" DefaultDepth 16 SubSection "Display" Viewport 0 0 Depth 16 Modes "1024x768" EndSubSection EndSection I can't guarantee those were the only important changes I made - I tried a few things in my attempts to create a valid xorg.conf file. But I'm pretty sure that the screen section was the important part.

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• Set Position of multiple bodies

  - by philipp

  I have a character composed of five bodies which are tied together by a lot of joints. On of them is the overall chassis, to which all forces and impulses are applied to move the whole Character. All in all that works very fine, except one thing: I need to set the Position of the Character so that it get Beamed from one place to the other in one single frame. Unfortunately I cannot get this to work. I tried the following code, without any success… playerbodies.forEach(function (bd) { bd.SetLinearVelocity(new b2.Vec2()); var t = bd.GetTransform(); t.p.x -= 10; bd.SetTransform(t, bd.GetAngle()); }); How can I make that happen?

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• How to configure hostname for `apache22` package on FreeBSD?

  - by Eonil

  I'm configuring development & test FreeBSD machine on VM. I installed apache22 package and restarted. But the daemon does not started with this error: %apachectl start httpd: apr_sockaddr_info_get() failed for test.box httpd: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName (13)Permission denied: make_sock: could not bind to address [::]:80 (13)Permission denied: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down Unable to open logs % My hostname is test.box. Because this is temporary test box, it has no real domain-name. But I used 2-level name to avoid long time waiting of sshd on booting. However, I searched web, and I modified /etc/hosts file like this (I didn't touches this file before): # This is original configuration #::1 localhost localhost.my.domain #127.0.0.1 localhost localhost.my.domain # New configuration ::1 localhost test.box 127.0.0.1 localhost test.box 127.0.0.1 test.box test Now apache fails with this error message: %apachectl start httpd: Could not reliably determine the server's fully qualified domain name, using test.box for ServerName (13)Permission denied: make_sock: could not bind to address [::]:80 (13)Permission denied: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down Unable to open logs % I don't know what's required now. Please let me know reason and solution of this error. ---- (edit) ---- The permission errors are caused from omission of sudo.

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• Installing RVM on 11.10

  - by Guided33

  I have been trying to get RVM properly installed on my system for 10 hours. The problem is, that when ever I run the command to download the install script I get this: edu@edu-VirtualBox:~$ bash -s stable < <(curl -s https://raw.github.com/wayneeseguin/rvm/master/binscripts/rvm-installer) mkdir: cannot create directory `/usr/share/ruby-rvm': Permission denied If I run the command with sudo, I can get it installed, but then that leads to a whole host of other issues. Every tutorial I read says that you should not be installing rvm with sudo for a single user install. Why can I seem to get it installed without running sudo?

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• Is adding in the header the license type enough to say: "my code is licensed"?

  - by silverfox

  I read on various sites about licenses. I did just put the license type in the header file (in my case a javascript file, open-source): /* * "codeName" "version" * http://officialsite.com/ * * Copyright 2012 "codeName" * Released under the "LICENSE NAME" license * http://officialsite.com/LICENSE NAME */ javascript code ... In the same folder I leave a copy of the license. The listing of the folder looks like this: * codeName.js * LICENSE In the file LICENSE is the full text of the license my code uses. What I cannot find anywhere that says is this is enough to say my code is licensed (the case of open-source). Is something more required?

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• Ubuntu 12.04 keeps rebooting after changing video settings

  - by ScottJShea

  In a pinch I had to install Ubuntu 12.04 on an HP Pavilion g6. I was not fond of the 1024 x 7678 resolution so after investigating and finding I had the intel chipset I set the below in the grub file: GRUB_GFXMODE=1366x768x32 GRUB_GFXPAYLOAD_LINUX=1366x768x32 This did not work. The system just keeps rebooting as nauseum. I powered down, inserted my Ubuntu Install USB, powered up, edited the Grub file on the disk (made sure it was the disk and not the Grub for the USB stick). Powered off and tried booting up again. Same thing. So: As a noob am I missing something in the boot to allow me into a recovery mode? (I cannot seem to get to the Grub menu) If not is there a way I can recover from this? UPDATE: Holding down the shift key after BIOS gets "GRUB Loading..." and then a reboot

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• Shouldn't all source code be plain text? [on hold]

  - by user61852

  Some developing environment/languages save the source code you write in a binary/propietary format that you cannot see or edit with a generic text editor. I'm not talking about compiled code, but the source code. An example could be PowerBuilder and Oracle Forms. It's ok you use proprietary technology if you want, but not being able to open the source code you wrote, in a simple editor, if only to read it, seems like a very strict form of vendor lock-in. Also this prevents you from using text-based version controls that can show you the difference between two versions in a line-by-line base. If the code is plain text, you don't need a license in order to just open it, see it and learn from it. Should it be a golden rule to avoid vendor lock-in to avoid technologies that save your source code to anything but plain text files ?

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• Final steps in installing Matlab2012 on Ubuntu 12.04

  - by Mattia

  I have a problem with the MATLAB 2012 installation. After having installed it using alt+f2 and having used gksudo nautilus I have installed MATLAB in the correct folder which is: /usr/local/MATLAB/R2012a Then I inserted the license and the window told "activation complete" or something like that. This made me happy, but only for a while because as soon as I try to search for Matlab within the applications I cannot find it and neither if I try to run matlab into terminal it says: command not found Can someone help me!? Tanks in advance!

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• Threading iPhone

  - by bobobobo

  Say I have a group of large meshes that I have to intersect rays against. Assume also, for whatever reason, I cannot further simplify/reduce poly check count by spatial subdivisioning. I can do this in parallel: bool intersects( list of meshes ) // a mesh is a group of triangles { create n threads foreach mesh in meshes assign to a thread in threads wait until ( threads.run() ) ; // run asynchronously // when they're all done // pull out intersected triangles // from per-thread context data } Can you do this in ios for games? Or is the overhead of thread creation and mutex waiting going to beat-out the benefit of multithreading?

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• Prediction happening on (sending) client side

  - by Daniel

  This seems like a simple enough concept, but I haven't seen this implemented anywhere yet. Assuming that the server just forwards and verifies data... I'm using mouse-based movement, so it's not too difficult to predict the location of the player 150ms from when the event is sent. I'm thinking it is more accurate than using old data and older data on the receiving clients' side. The question I have, is why can I not find any examples of this? Is there something fundamentally wrong with this that I cannot find anyone implementing or talking about implementing this.

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• Footer not showing in website depending on which item is loaded [on hold]

  - by samyb8

  I designed a website which is having an issue, but I checked the html tagging very well and cannot fix it. If you go to this item: http://www.tahara.es/store/headbands/11/Ivory-Turquoise-headband You will see the FOOTER display normally. However if you go to this other item: http://www.tahara.es/store/headscarves/15/Grey-and-ivory-with-stoned-flower-Headscarf The footer does not show. Any clue of what I am missing or adding? The footer DIV is like this: <div id="footer">

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• Is it possible to update my graphic card drivers?

  - by madmaxpt

  This is what the lspci -v command shows in the VGA compatible controller section: 00:02.0 VGA compatible controller: Intel Corporation Atom Processor D4xx/D5xx/N4xx/N5xx Integrated Graphics Controller (prog-if 00 [VGA controller]) Subsystem: Dell Device 048e Flags: bus master, fast devsel, latency 0, IRQ 44 Memory at f0200000 (32-bit, non-prefetchable) [size=512K] I/O ports at 18d0 [size=8] Memory at d0000000 (32-bit, prefetchable) [size=256M] Memory at f0000000 (32-bit, non-prefetchable) [size=1M] Expansion ROM at <unassigned> [disabled] Capabilities: <access denied> Kernel driver in use: i915 Kernel modules: i915 i915 is only compatible with OpenGL 1.4 and cannot use shaders and I'd like to use some Open GL 2.0 functionalities. Is it possible to update the drivers or is my hardware limited to OpenGL 1.4 ?

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• How to add reflection definition to read JSON files in web game

  - by user3728735

  I have a game which I deployed for desktop and Android. I can read JSON data and create my levels, but when it comes to reading JSON files from web app, I get an error that logs, "cannot read the json file". I researched a lot and I found out that I should add my JSON config class to configurations, so I added this line to gameName.gwt.xml, which is in core folder: <extend-configuration-property name="gdx.reflect.include" value="com.las.get.level.LevelConfig"/> But it did not work out. I have no idea where should I place this line or where I should change to make my web app work, so I can read JSON files.

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• How to add reflection definition to read json files on web game

  - by user3728735

  I have a game which I deployed for desktop and android, I can read json data and create my levels, but the problem is, when it comes to reading json files from web app, I get an error that logs, cannot read the json file, I researched a lot and I found out that I should add my json config class to configurations, I added this line to gameName.gwt.xml, which is in core folder <extend-configuration-property name="gdx.reflect.include" value="com.las.get.level.LevelConfig"/> but it did not work out too, I have no idea where should I place this line, or where should I change to make my web app work, so I can read json files

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• Linux OpenGL programming, should I use GLX or any other?

  - by pahnin

  I'm new to OpenGL and found that there are a lot of libraries to do that in C, and I also found that glx is most friendly with Linux X Server, I just want to do basic stuff, and I cannot find any tutorials for GLX. Is GLX a bad thing? I just want to do some small graphical things without installing many libraries and getting confused. Can anyone suggest me something which has tutorials and simple to compile? I found a link with an example with GLX and it worked perfect with no errors: anyone please suggest where I can find nice documentation or any better libraries.

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• How to grant standard users access to disk partitions and flash storage?

  - by JK04

  I have a partition that I need standard users (not administrators)to have read/write access to. However, this partition does not even appear to them as it does to me as an administrator. How can I make it so that standard users can read/write to this partition? It would be nice if they could have the ability to mount it if needed. I have the same problem with removable media - if I have a flash card in the computer, the standard users cannot see this storage media.

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• Increase Servers folder depth limit for running scripts?

  - by MeltingDog

  I have a CMS on my site that utilises TinyMCE (the WYSIWYG text editor). The issue is that TinyMCE cannot browse for files (example: images) on the web server. I get the error: Error 324 (net::ERR_EMPTY_RESPONSE): The server closed the connection without sending any data. I have been told this may be occurring because the server is configured to limit the folder depth for running scripts. Unfortunately I am primarily a front end developer so I am not really sure how to go about changing/viewing this. I have access to WHM and cPanel. Does anyone know how to adjust this?

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• Sever 2008 R2 Powershell Script runs manually, but not as a scheduled task

  - by Aeisor

  I have a Powershell script that runs manually using the Powershell ISE; However, when run as a scheduled task using an administrator's credentials the task does not run with the expected results. The script: $request=new-object System.Net.WebClient $request.DownloadFile("...url...", "C:\path\to\file.csv") The administrator user has Full Control of both the script and the folder it is writing to. The url exists and responds in a reasonable time (<1s). If I run the task manually the status is 0x41301 ("Currently Running") until I eventually end it. I have set the task up using both of these methods: Start a Program: C:\path\to\PS.PS1 Start a Program: C:\windows\system32\WindowsPowerShell\v1.0\powershell.exe with additional options -noninteractive -command "C:\path\to\PS.PS1" Using option 1, the task history shows it has opened an instance of notepad.exe but never terminates it. Using option 2 it completes the task but doesn't download / create the file. I have used Set-ExecutionPolicy Unrestricted as this is not a signed script. Any ideas?

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• How to use GetActiveUniform (in SharpGL)?

  - by frankie

  Generally, guesting is in header. I cannot understand how to use GetActiveUniform function. public void GetActiveUniform(uint program, uint index, int bufSize, int[] length, int[] size, uint[] type, string name); My attempt looks like this (everything is compiled and linked): var uniformSize = new int[1]; var unifromLength = new int[1]; var uniformType = new uint[1]; var uniformName = ""; Gl.GetActiveUniform(Id, index, uniformNameMaxLength[0], unifromLength, uniformSize, uniformType, uniformName); After call I get proper uniformSize, length and type, but not name.

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• Installed Windows 7 Ultimate on D Drive and previous Windows 7 Enterprise on C Drive has stopped starting up

  - by teenup

  Please please help! I have installed Windows 7 Ultimate on same hard drive on D Drive on my laptop and the previous Windows 7 Enterprise which was installed on C Drive is not booting up now. When I turn on my laptop, I see two Windows 7 on the screen, when I select newer one, it starts, but when I select older one which is Enterprise edition, system won't start and I get the DOS black screen with this error message: Windows Boot Manager Windows failed to start. A recent hardware or software change might be the cause. To fix the problem: Insert your Windows installation disc and restart your computer. Choose your language settings, and then click "Next." Click "repair your computer." Info: The boot selection failed because a required device is inaccessible. I notice that when I run the newer OS installed, the previous OS's drive (Which is D: now instead of C:) has become unusable and when I double click it, it asks me to format the drive. The data, that I had on my D Drive (Which is now C Drive for new OS), I had copied it to a network path and it is available. It was containing Windows 7 Users folder which I copied at that time when installing new windows. I have copied that Users folder again to the new OS's C Drive thinking it would run again, but of no use. Please please please...if someone can help...It is extremely required for me. Thanks a lot in advance.

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