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• How do I prevent software packages from being downloaded until I know it's safe?

  - by Dave M G

  Recently, an update that caused a problem with Gnome session caused me to lose a day's work. The solution was to rollback some packages to a previous version. The update manager is now telling me that my old packages should be updated: ... but I don't want to do that until I know that whatever bug or problem the latest version has is resolved. I understand that with any upgrade that there is a risk of instability. However, in the 8 years or more that I've been on Ubuntu, using the latest releases has been stable enough and with the benefit of the latest features and security. So, I'm not looking for general advice on how to handle upgrades. What I'm saying is that in this one particular instance, the bug introduced by these upgrades is severe and time wasting. But, as an end user, when I encounter a problem like this, I have no idea how to address a specific concern about a specific package. I don't, for example, know which of these packages is the problem, and I can't take time from my work schedule to be experimenting with each package. So, my question is: How do I find out who exactly is responsible for these, or any, packages so that I can contact them and let them know about the problem? How do I freeze these packages only, but allow other upgrades to happen? ubuntu-session gnome-session-common gnome-session-bin gnome-session

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• Updating entities in response to collisions - should this be in the collision-detection class or in the entity-updater class?

  - by Prog

  In a game I'm working on, there's a class responsible for collision detection. It's method detectCollisions(List<Entity> entities) is called from the main gameloop. The code to update the entities (i.e. where the entities 'act': update their positions, invoke AI, etc) is in a different class, in the method updateEntities(List<Entity> entities). Also called from the gameloop, after the collision detection. When there's a collision between two entities, usually something needs to be done. For example, zero the velocity of both entities in the collision, or kill one of the entities. It would be easy to have this code in the CollisionDetector class. E.g. in psuedocode: for(Entity entityA in entities){ for(Entity entityB in entities){ if(collision(entityA, entityB)){ if(entityA instanceof Robot && entityB instanceof Robot){ entityA.setVelocity(0,0); entityB.setVelocity(0,0); } if(entityA instanceof Missile || entityB instanceof Missile){ entityA.die(); entityB.die(); } } } } However, I'm not sure if updating the state of entities in response to collision should be the job of CollisionDetector. Maybe it should be the job of EntityUpdater, which runs after the collision detection in the gameloop. Is it okay to have the code responding to collisions in the collision detection system? Or should the collision detection class only detect collisions, report them to some other class and have that class affect the state of the entities?

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• My work isn't being used... what can/ should I do?

  - by Matt

  Several months ago I was approached by a small business, who had seen my work previously and asked me to create a website for them. Since then, the website hasn't changed one bit and I haven't heard a word from them. This sucks for them as they paid for a website and haven't used it. It''s frustrating for me because I spent a huge amount of time on the website and feel that all of that effort has been wasted, furthermore, I don't feel I can use the website on my portfolio/ CV. I was thinking of offering to go round to their office for one day, and update the website for them then and there; but I'd need their support whilst there (to get the content for the about page, to get information for on their products etc.) and I don't want to disrupt their work day, nor do I want to sit there like a spare tyre and get nowhere. Furthermore, if I were to do this, should I expect to receive money for it? It's a day of my life, but I'm doing it for my benefit rather than theirs (but they benefit as well). Has anyone else had experience of a client not using their product; how did you handle it? Additional background for those who want it: The company is a local travel agent, and the website lets them CRUD offers and locations, and has several other static pages (about, contact, etc.) At the time of creating the website, I filled the static pages with lipsum, and the offers and locations with fake information, so that I could give the business an idea about what the final pages would look like; during the hand over, I guided them through the CRUD forms (they made notes) and said if they sent me the text for the pages, I'd update it.

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• Image caching when rendering the same images on different pages

  - by HelpNeeder

  I'm told to think about caching of images that will be displayed on the page. The images will be repeated throughout the website on different pages and I'm told to figure out the best way to cache these images. There could be few to dozen of images on single page. Here's few questions: Will browser caching work to display the same images across different web pages? Should I rather store images in stringified form in a memory instead, using JavaScript arrays? Store them on hard drive using 'localStorage'? What would be easiest yet best option for this? Are there any other alternatives? How to force cache? Any other information would be greatly appreciated...

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• Is it possible to pay customers with PayPal?

  - by CJxD

  Usually with PayPal we buy goods and services by sending money from customer to business. Now, I want my business to pay my customers; I want to allow them to withdraw money from a virtual wallet on my website. I did notice there is an 'Adaptive Payments API' which mentioned something vaguely similar to this, but I haven't been able to search up enough information to come to any conclusion. So is it possible to send money from business to customer (autonomously) with PayPal? If not, are there any alternatives?

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• PC shuts down when installing ubuntu?

  - by Robin002

  I'm now using ubuntu from USB, and I'd like to install ubuntu on my hard disk. I tried the option of removing Vista while installing ubuntu. However, near the end of the installation process (presumably the end because I can see some slideshows on how to start using ubuntu), the screen suddenly goes to black with white words running around on it. Soon the computer shuts down. After that, restarting leads to a black screen with only a small white cursor on the top left corner. The cursor keeps blinking and nothing happens. I found that I can alternatively choose to boot with USB by hitting F12 just when the computer starts. So I tried to reinstall ubuntu by running ubuntu on USB. One of the options of installation is to update ubuntu 11.04 to ubuntu 11.04, so it seems the ubuntu is already installed somehow. Anyways, I tried both update and delete and install option but the same thing happens as the 1st time (sometimes before reaching the end), while I still cannot start my PC as ubuntu (without USB). How may I install ubuntu properly?

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• Outlook stopped working after updating to Windows 8

  - by MikkoP

  I downloaded Windows 8 update from Microsoft's site and installed it. Everything works perfectly except Outlook. Sometimes receiving messages doesn't work for whatever reason. Now the problem is sending and replying. Before these two worked but after receiving messages started to work, these problems have occurred. When I try to press New to create a new email, I get the following error message Cannot create the e-mail message because a data file to send and receive messages cannot be found. To add a data file, such as a personal folder file, double click the Mail icon in Windows Control. When I try to reply a message, I get the following one The operation failed. An object could not be found. After the update Outlook worked ok. I've had other problems with Outlook too.

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• Ubuntu for Phones / Touch vs Android, IOS and BlackBerry OS

  - by Ome Noes

  Currently I have a LG Google Nexus 4 with lots of issues because of the latest android 4.3 update. Since the update my battery drains within 7 hours when in it's standby / idle and even faster when I use it normaly! Before the Nexus 4 I had an Iphone but got sick of IOS because for me it's to much of a closed operating system and I dislike having to work with either Windows or Itunes. At this point neither Google or LG is willing to provide me (and all the others that have similar Nexus 4 problems) with a solution or even a reaction... Also i'm not very fond of the idea that the NSA (and maybe others) can and is currently monitoring millions of Android, IOS and BlackBerry OS devices all over the world. Since i've been using Ubuntu now very happily for almost 5 years I see Ubuntu for Phones / Touch as the only remedy for all this BS. Please be so kind to let me know when you will have a fully functioning version of your Ubuntu for Phones / Touch ready for consumer use. I'm realy sad that the Ubuntu Edge campaign didn't work out and hope to see lots and lots of future smartphones outfitted with Ubuntu a.s.a.p.! Keep up the good work!

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• Uninstalling PowerShell 1.0

  - by Ddono25

  I am attempting to standardize our PowerShell deployment and usage across all servers, which involves uninstalling PS1.0/installing PS2.0 on Server 2003 machines. In searching for KB926139 through CMD and Control Panel Add/Remove Programs, it is nowhere to be found. We have KB926141 installed on these servers as the Language Pack update, but no initial Install Update. PowerShell 1.0 is installed on the server and can be found at the default locations (%windir%\System32\WindowsPowerShell\V1.0, %windir%\Syswow64\WindowsPowerShell\V1.0). I would like to avoid deleting the Registry Entry in this situation since it should be pretty simple, any help would be appreciated. Thanks!

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• DVD wont mount Ubuntu 12.04

  - by CyborgGold

  I can't seem to be able to mount my optical drive. I have tried numerous solutions from this site with no results. I am not able to see the device inside the file browser either. There is a DVD in the drive. I am running 12.04 on an HP g60-235dx portable. I have a link below to the specs. I will also list what I have tried (that I can find back right now.) I know the drive is functioning, because just before Windows 7 crashed and my MBR went fubar I was watching movies just fine. I am fairly new to linux, so don't assume I know anything. Ok, so here is what I have tried: sudo wget --output-document=/etc/apt/sources.list.d/medibuntu.list http://www.medibuntu.org/sources.list.d/$(lsb_release -cs).list sudo apt-get --quiet update sudo apt-get --yes --quiet --allow-unauthenticated install medibuntu-keyring sudo apt-get --quiet update sudo apt-get install libdvdcss2 dmesg | grep sr0 (no output) apt-get install libdvdnav4 (already installed, and up to date) sudo /usr/share/doc/libdvdread4/install-css.sh ls -l /dev/cdrom /dev/cdrw /dev/dvd /dev/dvdrw /dev/scd0 /dev/sr0 ls: cannot access /dev/scd0: No such file or directory lrwxrwxrwx 1 root root 3 Sep 10 03:51 /dev/cdrom -> sr0 lrwxrwxrwx 1 root root 3 Sep 10 03:51 /dev/cdrw -> sr0 lrwxrwxrwx 1 root root 3 Sep 10 03:51 /dev/dvd -> sr0 lrwxrwxrwx 1 root root 3 Sep 10 03:51 /dev/dvdrw -> sr0 brw-rw----+ 1 root cdrom 11, 0 Sep 10 03:51 /dev/sr0 wodim --devices wodim: Overview of accessible drives (1 found) : ------------------------------------------------------------------------- 0 dev='/dev/sg1' rwrw-- : 'TSSTcorp' 'CDDVDW TS-L633M' ------------------------------------------------------------------------- sudo lshw optical *-cdrom description: DVD-RAM writer product: CDDVDW TS-L633M vendor: TSSTcorp physical id: 1 bus info: scsi@1:0.0.0 logical name: /dev/cdrom logical name: /dev/cdrw logical name: /dev/dvd logical name: /dev/dvdrw logical name: /dev/sr0 version: 0200 capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram configuration: ansiversion=5 status=nodisc sudo lshw | grep cdrom *-cdrom logical name: /dev/cdrom Spec sheet for portable: http://www.cnet.com/laptops/hp-g60-235dx/4507-3121_7-33496192.html If you need any more information than all of that... please let me know.

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• Are there good replacements for client-side java in web programming? [closed]

  - by varesa

  Now since the latest java exploit, and many others in the past, people are again recommended to get rid of java on their computers for good. I, as a java web applications developer, am think about possible alternatives. Many seem to have gotten rid of java, so I would not like to develop for an environmet, that users do not have on their computers, and that they are not willing to install for security reasons. Are there any other real options that HTML5 + JS? (Don't take me wrong about not wanting HTML5+JS, I just want to know the options)

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• How to use AD/GPO/Print Services to "push out" a new printer driver to replace a broken one? How did my server get a broken driver?

  - by Zac B

  Context: We have an AD/GPO-managed corporate network with a little over a hundred PCs running Windows 7 x64, and a few managed printers. Our Server2008R2 primary domain controller is configured as a print server for them all. Problem: After a recent windows update and restart (no printer driver updates were included) on the DC, a particular shared printer (Lexmark T650) has begin exhibiting some strange behavior. First, it prints a preceding and following blank page for almost every document, on jobs submitted by about half of client machines (no separator page is configured on the server or any of the clients I've seen). Second, whenever someone tries to access "Printing Preferences" on any client, they recieve the following error message (this happens everywhere, 100% of the time, and didn't happen before the update on the DC): Once they click "OK", the prefs screen appears (with no separator page selected) and everything seems fine. I'm not even sure if these two issues are related, but everyone seems affected by one or both of those issues. What I've Tried: I've been hesitant to un-deploy the problem printer, or remove it via GPO, as it's pretty heavily used. I've tried updating (via MS update and our internal WSUS server) client machines and the DC. No printer driver updates have appeared, and no number of updates or restarts on the server or the client seems to have achieved anything other than my boss getting grumpy that I'm bouncing the domain controller so often. I've tried deleting the drivers on the server, and re-installing them from the original source that has worked for the past year...no change. I've tried selecting "New Driver" for one of the shared printers on a client machine, running as domain admin, and pushed the latest driver found by MSupdate back up to the DC. This changed the version number of the driver recorded in the print server manager, but caused no change--on the client I pushed from, or on any other. The error still appears. Question: Why the heck is this happening? Obviously, I got a bad driver from somewhere, but how do I get rid of it? I don't know of any "roll back drivers" functionality for centrally managed print drivers like Windows offers for other devices. How would I a) get this issue resolved on a client, and b) push the fix to the other members of the domain?

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• Windows audio service fails to automatically start after VirtualBox install

  - by humble_coder

  I'm having a completely nonsensical issue in Windows XP SP3. Basically my "Windows Audio" service no longer starts automatically. Despite being set to "Automatic" I have to manually go in and start it. This issue didn't start until the most recent update of VirtualBox, but I can't find anything on the forums related to this specific issue. I've tried reinstalling the RealTek drivers as well, in the event that that had something to do with it. Any assistance is most appreciated! EDIT 1: It is the host's audio that won't start. The update of Virtualbox was merely the "marker" of when these events started occurring. Given it's the only variable/change I'm assuming a correlation.

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• Issue using a "used" SSD as a Windows 8.1 Boot Drive

  - by EpiGrad

  So, I'm something of a Mac person, but decided to take a stab at this whole "build yourself a PC" thing - right now, the thing is assembled, posts just fine, and can get to the BIOS. The problem is the drive I want to use - I intended to use a 80 GB Corsair SSD I've had sitting around as the boot drive, and a new Samsung SSD for games and the like. So I boot using a Windows 8.1 install USB stick, and if the Samsung drive is plugged in, it happily offers to install Windows on it. The Corsair drive though, it's flipped out - I reformatted it as a blank NTFS drive (it was HFS for Mac purposes) and the BIOS can't see it, nor can the Windows installer. What's wrong, and how do I fix it? The tools at my disposal are: The current ASUS BIOS that came with my motherboard (a Z87I-Deluxe), a Mac running the latest OS X which can also boot to Windows 7 if needed via either Parallels or Bootcamp. Update 1: Update: Based on a friend's suggestion to switch SATA ports, Windows 8.1's installer can now see the drive as Drive 0, Partition 1, a 83.8 GB "Primary" partition. But when I click it and hit "Next", I get the following error: "We couldn't create a new partition or locate an existing one. For more information, see the Setup log files" - not that it gives any clue how to access those. Update 2: Following a trail of Google suggestions, I ended up going into advanced tools and just reformatting the drive as follows: Start DISKPART. Type LIST DISK and identify your SSD disk number (from 0 to n disks). Type SELECT DISK <n> where <n> is your SSD disk number. Type CLEAN Type CREATE PARTITION PRIMARY Type ACTIVE Type FORMAT FS=NTFS QUICK Type ASSIGN Type EXIT twice (one to get out of DiskPart, the other to exit the command line tool) Per these instructions. This goes well enough, but now I can select the disk for installation, and I get a new error: "Windows 8 cannot be installed to this disk. The selected disk has an MBR partition table. On EFI systems, Windows can only be installed to GP disks." So, Googling that, I do the following: select disk 0 clean convert gpt exit ...and we might have fixed it. Windows is at least trying to install now.

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• How can I use a .html file as desktop background/wallpaper?

  - by dudealfred

  I have one of those underpowered netbooks with Lubuntu. I also have an iPod Touch. I'd like the best of both worlds. So I would like to create an active html wallpaper with beautiful little squared icons to launch my webapps through Chromium/Firefox. I've read a bit, but it looks like there isn't really anything that would allow for that. Why? Does anyone have any other alternatives (apart from buying an iPad)? :)

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• No Audio Output Device is installed

  - by mabho

  Hi, this is an intermitent problem in my Sony Vaio model PCG-5K1L. I keep on getting a "No Audio Output Device is installed" when hovering my loudspeaker icon in Windows Vista. I have tried System Device Manager Sound Realtek High Definition Album Update Driver Software. The update process went through, but nothing happens. Still Vista does not seem to recognize my audio software. The strange part is that out of nothing my sound card can resume working to stop again hours later... If someone has any clues to solve this, please, help. Thanks a lot.

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• Factory for arrays of objects in python

  - by Vorac

  Ok, the title might be a little misleading. I have a Window class that draws widgets inside itself in the constructor. The widgets are all of the same type. So I pass a list of dictionaries, which contain the parameters for each widget. This works quite nicely, but I am worried that the interface to callers is obfuscated. That is, in order to use Window, one has to study the class, construct a correct list of dictionaries, and then call the constructor with only one parameter - widgets_params. Is this good or bad design? What alternatives does the python syntax provide?

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• What antivirus software supports updates without an internet connection?

  - by Michael Gundlach

  I'm putting antivirus software on Windows 7 computers in the middle of Africa. The computers don't have internet access, but still need to be protected against viruses from CDs and thumbdrives. Separate from these computers is one computer that does have extremely spotty internet access. What's the best AV software for this situation? The important part, as I see it, is that we need to keep the computers up to date, but can't let the AV software suck down updates at its leisure: the computers are disconnected, and getting emails onto the connected computer is a challenge enough. We thought we might transfer update files to the connected computer using a protocol that can handle repeated connection drops (e.g. FTP with resume.) Then we'd manually apply the update files to the disconnected computers. Does any AV software support this? Is there a better solution?

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• Designing object oriented programming

  - by Pota Onasys

  Basically, I want to make api calls using an SDK I am writing. I have the following classes: Car CarData (stores input values needed to create a car like model, make, etc) Basically to create a car I do the following: [Car carWithData: cardata onSuccess: successHandler onError: errorHandler] that basically is a factory method that creates instance of Car after making an API call request and populating the new Car class with the response and passes that instance to the successHandler. So "Car" has the above static method to create that car, but also has non-static methods to edit, delete cars (which would make edit, delete API calls to the server) So when the Car create static method passes a new car to the successHandler by doing the following: successHandler([[Car alloc] initWithDictionary: dictionary) The success handler can go ahead and use that new car to do the following: [car update: cardata] [car delete] considering the new car object now has an ID for each car that it can pass to the update and delete API calls. My questions: Do I need a cardata object to store user inputs or can I store them in the car object that would also later store the response from all of the api calls? How can I improve this model? With regards to CarData, note that there might be different inputs for the different API calls. So create function might need to know model, make, etc, but find function might need to know the number of items to find, the limit, the start id, etc.

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• crontab still sending emails even with > /dev/null

  - by user2344668

  I have a crontab (root) that runs a script and output is set to /dev/null but I always get the emails whenever it runs. I only want to receive error emails. # Rackspace driveclient update (12pm MST) 0 12 * * * /root/scripts/driveclient-update > /dev/null The only way I can get it to turn off is to use /dev/null 2&1 but then I won't get error emails. This is happening on three different CentOS servers, two are 6.3 and one is 6.4. NOTE: I have read over and over that /dev/null is supposed to send stdout there and prevent the email if there is nothing but stdout from the script, so at works for at least some people; I cannot figure out why it is not working on these servers. Here's an example of where /dev/null is supposed to work: http://www.alphadevx.com/a/384-Suppressing-Cron-Job-Email-Notifications

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• Automating the installation using SSH

  - by RAY

  I am running a bash script from a remote host to run a binary file which installs 64 bit JDK 6 update 29 on multiple VMs across the Environment. It is installing the file but, at the last line i have to hit a enter to complete the installation. I want to fully automate the script where i do not have to hit the enter at the last line. This is what i am using ssh ${V_TIERS}@${V_TIERS} 'cd JDK; sh jdk-6u29-solaris-sparcv9.sh' It updates as desired, but during install i have to hit enter to continue and complete the installation. Can anybody please help to fully automate the update process.

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• Wednesday at Oracle OpenWorld 2012 - Must See Session: “Cloud and On-Premises Applications Integration, Using Oracle Integration Adapters”

  - by Lionel Dubreuil

  Don’t miss this “CON8642 - Cloud and On-Premises Applications Integration, Using Oracle Integration Adapters“ with Ramkumar Menon - Senior Product Manager, Oracle: Date: Wednesday, Oct 3 Time: 1:15 PM - 2:15 PM Location: Moscone South – 310 Oracle integration adapters in Oracle Fusion Middleware offer organizations a service-oriented approach to unlocking the information assets that have evolved in most IT environments. This session provides a detailed overview of their features and product architecture and an update on the 11g release. It also examines the changing application and technology landscape and how the integration adapters will continue to provide connectivity and harness information from diverse enterprise applications and technologies—both on-premises and in the cloud. Objectives for this session are to: Present an Oracle integration adapters overview Describe key use cases Provide an update on the 11g release and future roadmap Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Calibri","sans-serif";}

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• how to merge changes from original project -- GitHub in Windows

  - by user62046

  I created an account at https://github.com/, fork someone's project so I have my own repository, instal github client for windows, and clone my repository to my local drive. I will work on my local drive. But during the developement of the project, I would like to merge the changes in the official, original, project. I didn't find how to do this. Before, I use tortoiseSVN client for windows, and there is an option "SVN Update" which can update the project to the latest revision. But I am new to Github and its client, and don't know how to do it.

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• How do I install OSQA with limited access to the server?

  - by Noir

  I would very much like to install OSQA on my host (provided/owned by my friend), but I can not make heads or tails of how I would go about doing it; a lot of the dependancies and such can't be installed with the current level of access (or most probably just knowledge) that I have. I can provide any further information required, and attempt to contact (friend) to see if he can do any of it for me, but I'm unsure as to how often I will be able to contact him. exec and shell_exec are not disabled on the server. If there are any other alternatives that I could use, please let me know! I tried Qwench but that was pretty buggy. I can usually deal with these kind of things, but this is my first foray into Python stuff!

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• Why do I get a blinking screen when running lwjgl?

  - by SystemNetworks

  I didn't have any errors. But When I run my lwjgl game, it gives me a blinking screen. Here is the code: package L1F3; import org.lwjgl.opengl.Display; import org.lwjgl.opengl.DisplayMode; import org.lwjgl.LWJGLException; import static org.lwjgl.opengl.GL11.*; public class Main { public static void main(String[] args) { try { Display.setDisplayMode(new DisplayMode(640, 480)); Display.setTitle("A fresh display!"); Display.create(); } catch (LWJGLException e) { e.printStackTrace(); Display.destroy(); System.exit(1); } while(!Display.isCloseRequested()) { Display.update(); } Display.destroy(); System.exit(0); } } How do I stop the blinking screen? I was thinking its my framerate. I deleted Display.sync but it still gives me all white and black. Last time it didn't give me a blinking screen. EDIT When I remove Display.update() , it gives me a perfect screen, no blinking or no white. Will my game work without it? I can also close it perfectly.

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