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• 12.04 Screen goes OFF and ON and hangs

  - by SKC

  i have installed ubuntu 12.04. while i'm using the screen goes off, comes back on (during which time, the system is not responsive) and this process repeats one more time in immediate succession after which the computer is responsive again. sometimes the system hangs indefinitely. sometimes the windows go blank. only the title bars are seen. i have tried re-installing the OS three times with no improvements. i have tried both 32 bit as well as 64 bit. i have no idea what the problem is and have tried hard to pin point that. i never had this prob till 11.10 my system config is as follow processor - 2nd gen intel core i7 (2660k) graphics - intel onboard HD graphics 3000 (no external graphics card) RAM - 4GB none of my friends seem to experience this problem. it really gets annoying as it happens really often. please advice

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• XNA Monogame GameState Management not deserilaizing

  - by Pectus Excavatum

  I am having some trouble serializing/deserializing in a little game I am doing to teach myself monogame. Basically, I am using the gamestatemnanagement resources common to monogame (screen manager etc). Then I am serializing my screen manager component and all associated screens in the OnDeactivated method: protected override void OnDeactivated(Object sender, EventArgs args) { foreach (GameplayScreen screen in mScreenManager.GetScreens()) { DataManager.SaveData(screen.Level.LevelData); } mScreenManager.SerializeState(); } The Save data bit is to do with something else. Then I then override OnActivated to de serialize protected override void OnActivated(Object sender, EventArgs args) { //System.Diagnostics.Debug.WriteLine("here activating"); mScreenManager.DeserializeState(); } However, when this runs it just loads a blank screen - it goes into the game initialize and the game draw method, but doesnt go down into the screens initialize or draw methods. I have no idea why this might be - any help would be greatly appreciated. I am not the only one who has encountered this - I found this post also - https://monogame.codeplex.com/discussions/391117

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• Change guest username

  - by Eelviny

  Now, looking around on Google shows me some ways in which to customise the settings of the Guest session. But, I would love a way to change the name of the Guest account. Basically, I'm planning to take some laptops out to a school in Africa and want to rename the "Guest" account in 14.04 to "Student" so the students use that. They tend to store stuff on USB sticks and they're using the Guest account so they can't break anything. EDIT: I'll expand on this slightly. They're using the guest account simply for the reason it doesn't save anything after logoff. This was a specific thing the teachers have asked for. I don't mind if the actual username remains guest behind the scenes, but as long as it shows up as Student to on Unity. Any way of going about this?

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• Ubuntu 13.04 is showing some error while opening my computer

  - by Singh

  Few months before when I was using Ubuntu 12.04 then I found some errors while starting my computer. Due to this problem I had given my CPU to a shop to repair it I don't know what he has done to my CPU but I only know that finally I got my CPU with Ubuntu 13.04. The technician was unable to make any partition and I also think that he had installed 13.04 over 12.04 and so now my computer is showing some error when I'm starting my computer the error is as follows: error: attempt to read or write outside of the disk 'hd0'. grub rescue _ Before showing this error, few times my computer was working very slow. So kindly someone tell me that is there any way by which I can start my computer. Please also tell me that what things I have to keep in mind while using Ubuntu so that in future I find no difficulties(errors) while using Ubuntu.

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• How best to merge/sort/page through tons of JSON arrays?

  - by Joshiatto

  Here's the scenario: Say you have millions of JSON documents stored as text files. Each JSON document is an array of "activity" objects, each of which contain a "created_datetime" attribute. What is the best way to merge/sort/filter/page through these activities via a web UI? For example, say we want to take a few thousand of the documents, merge them into a gigantic array, sort the array by the "created_datetime" attribute descending and then page through it 10 activities at a time. Also keep in mind that roughly 25% of these JSON documents are updated every day, and updates have to make it into the view within 5 minutes. My first thought is to parse all of the documents into an RDBMS table and then it would just be a simple query such as "select top 10 name, created_datetime from Activity where user_id=12345 order by created_datetime desc". Some have suggested I use NoSQL techniques such as hadoop or map/reduce instead. How exactly would this work? For more background, see: Why is NoSQL better for this scenario?

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• How to set up a mail server on Linux only for sending admin/debug emails?

  - by ChocoDeveloper

  I need to send server reports to myself from my remote servers, and I don't mind them going to spam, so I don't need SPF, DKIM, etc. I tried using mailutils to send something like this: uptime | mail -s "uptime" [email protected], but the emails don't go through. In /var/mail/root I received a message saying the HELO was invalid. So then I tried also adding -r root@my-ip, and now I don't get any error messages but I don't receive the email either. How can I do this?

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• SQL SERVER Difference Between GETDATE and SYSDATETIME

  Sometime something so simple skips our mind. I never knew the difference between GETDATE and SYSDATETIME. I just ran simple query as following and realized the difference. SELECT GETDATE() fn_GetDate, SYSDATETIME() fn_SysDateTime In case of GETDATE the precision is till miliseconds and in case of SYSDATETIME the precision is till nanoseconds. Now the questions is [...]...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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• mouse and mousepad not working properly

  - by snake

  Ubuntu 12.04 LTS Samsung Q35 The mouse pad has stopped working, only the buttons work. The external mouse is also behaving very oddly, the mouse pointer works, but the button is not working properly, it has to be pressed many times or held down to select anything, and when anything that I select behaves as though the mouse is being clicked all the screen, settings will keep changing, the page will scroll, sliders will move up and down, tabs will toggle etc, so everything is unusable with the mouse, cannot even use the browser as it keeps scrolling the page up and down. I have tested the mouse on another computer, and it works fine. Please bear in mind that I am also a complete Linux novice, I installed Ubuntu on an old laptop for my kids, that is the limit of my experience.

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• Anti-depressant and programming: does it reduce your thinking and focusing abilities ?

  - by user12358

  I wanted to ask your opinion on anti-depressants, since I took them daily for 3 years now, but I can't be sure if I'm less perfomant with them or without, since I never withdrawed. I'm still at school at the age of 25, still having some motivation problems (for example I can't get used to do something at school if I don't think it will teach me something), but I'm quite motivated to work in the video-game field, since I have some personnal projects in mind. I know C++ programming etc, I'm still learning techniques, but do you think I should try more to do my project instead of just following the work I'm assigned to ? Have you had experience with depression or anti-depressants ? How did it affect your work ? Do you think that being depressed or half-depressed can improve creativity ? Do you feel it has affected the way you end up writing your algorithms ? EDITED

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• How is your working time distributed between coding and thinking?

  - by mojuba

  ...in percentage. For example 60/40 or 90/10 or 100/0. My hypothesis is that the bigger the proportion of time you spend thinking the smaller your code can be as a result (and the less time will be needed to write it down). Think more, write less, in other words. Do you think it is true? As a side note, I think in typical software companies thinking is not part of the culture anyway: you are usually supposed to be sitting there at your computer typing something. You will almost definitely be noticed by your managers if you wander about with a blank look thinking over your next steps with your code. Too bad.

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• How to ask questions on the Forums

  - by TATWORTH

  Based upon answering many questions on forums such as forums.asp.net, here are some tips on getting your questions answered, once you have exhausted searching on your own. Choose a concise but meaningful title but avoid words like "urgent" Post to the correct section of the forum - some people specialise in a particular section of a given forum Make it clear that you have already made an effort to answer yourself. Summerise the environmental context of your question e.g. If using SQL then state the version e.g. SQLExpress 2008 If you need to post a code or markup sample, tidy it up by removing extraneous blank lines and set the tab spacing to 2 rather than 4. Take your time composing the question so that it is set out as clearly as possible. Remember that the majority of people providing answers do so in their own time. Be very polite and thank those that help you.

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• Why do i keep forgetting things? [closed]

  - by Mr.Anubis

  I am currently learning many things at the same time in C++ and coded many data structures and algorithms and some small applications. When I suddenly try to remember something that I coded many months ago, my mind completely goes blank. It's like I'll have to re-learn the whole thing. For example, recently I was thinking to refactor my BST data structure, when I realized that I don't even remember how I coded it or how does it works internally. Does this happen with many others? Or is it me only? How do I overcome this problem?

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• How to use auto login in a remastered LiveCD?

  - by Jayo

  I have been creating a custom live CD of Ubuntu 11.10 using remastersys, everything goes well except that the live session asks for a login. the login is automatically set as "custom" and the password is blank. this is fine, but I would rather it went direct to the desktop in a live session as you would expect from other distro live cds. I have asked on the remastersys forums, the question has gotten a lot of views, but no answer as of yet, I am wondering has anyone here remastered a distro and come across the login problem, and if so, how did you fix it?

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• Develop JavaScript API to expose web services [closed]

  - by Apps

  We are planning to develop a JavaScript API to expose some of our J2EE based services. We are doing this keeping Google Maps API in mind. Can someone please suggested where we should start and the approaches that we need to follow to create a useful and extensible JavaScript API? These are the things that we are considering to achieve. It should be very simple for others to use our API. We feel Google Maps API is like that. We should be able to release the updates of the APIs without affecting the existing implementations. We should have enough security measures so that not all can use these services. Please suggest us if there are any books that can guide us through. Any suggestion will be greatly helpful for us. Please let me know if my question is not clear or you need any further information.

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• FRM-40654 Error on Purchase Order Lines?? Stop 'em Now by Applying Patch 14204845

  - by user793553

  Procurement Development has just released a new patch for Release 12 that will stop those annoying FRM-40654 errors on Purchase Order lines, before they occur. When a Purchase Order (PO) is created through autocreate from a requisition line that accidently has blank spaces, this triggers a row lock and when the user tries to update the created PO the FRM-40654 error message ‘Record has been updated. Requery block to see the change’ occurs. Development has added code to remove these leading or trailing spaces, thus avoiding the issue in the first place.  This patch has been added to the recommend patch list in Doc ID 1358356.1 'Recommended Patches for Purchase Order and Requisition Processing'.  Be proactive and apply Patch 14204845:R12.PO.B now!

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• Intel GMA 4500M screen resolution problem

  - by I Heart Ubuntu

  I was previously running 10.10 on my Acer Aspire laptop. It has Intel GMA 4500M integrated graphics and worked just fine. Great display, sharp, crisp, etc. I decided to do a fresh install of 11.10 Oneiric and now am having problems. Originally I was getting the dreaded blank screen where the brightness was turned almost completely off. Some searching pulled up several easy fixes (editing GRUB). Right now I am still having one issue. The screen resolution is stuck at a max of 1024x768 giving me a distorted screen. Is there any way to fix this issue? I've Googled, searched Ask Ubuntu and also spent time on the forums looking for a solution. Thus far, nothing. Apparently, was and still is a concern in Natty? Any help would be greatly appreciated.

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• Boots to terminal

  - by Core Xii

  I had a system running 10.04, I think. I upgraded it to 11.04, everything was fine. But then when I upgraded it further to 11.10, the system would only boot to a terminal, no desktop like before. I installed 12.04 on it instead, keeping /home which was on another partition... but it's still booting to terminal. I believe there may be some bad configuration files left over that are causing this. Looking at other similar issues, I looked for /etc/X11/xorg.conf but it doesn't exist. startx says it isn't installed. Installing nvidia-current didn't help (has GF 6600 GT video card). Alt+F7 shows a blank screen. I used the alternate installer, and didn't select any of the optional packages it prompts during installation. Should I have? How do I get it to boot to desktop like normal?

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• Survey says: Java technology rules

  - by hinkmond

  Eclipse came out with their Open Source Developer Report and Survey for 2012. In it, we see (in the words of the immortal Richard Dawson, RIP) "Surveys Says!": Java computer programming language is on top. See: Java is the top Here's a quote: The Eclipse community was invited to participate in the survey between April 23 and May 15 of this year. Skerrett says the Foundation promoted the survey primarily through social media (Facebook, Twitter) and online forums. Of the 840 people who responded, 732 completed the survey... So, now we know who's on top, we can keep this in mind the next time this question comes up on Family Feud. Hinkmond

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• In the absense of a CS degree, how can I "fill in the gaps" so to speak?

  - by Richard DesLonde

  The problem here is that "I don't know what I don't know". How can I fill in those gaps? What is it that a computer science degreed person will know that I don't? Note: This isn't a personal question. I'm not asking you to read my mind so you can tell me where my knowledge is lacking. I'm really asking "Where/how can I get the knowledge a computer science degree would give me, without getting one?" Example: I don't know anything about compilers, but I understand that comp sci majors often are required to write some sort of compiler. This seems like something that would be useful to know. Etc.

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• How to write efficient code despite heavy deadlines

  - by gladysbixly

  Hi all, I am working in an environment wherein we have many projects with strict deadlines on deliverables. We even talk directly to the clients so getting the jobs done and fast is a must. My issue is that i'd always write code for the first solution that comes to my mind, which of course I thought as best at that moment. It always ends up ugly though and i'd later realize that there are better ways to do it but can't afford to change due to time restrictions. Are there any tips by which I could make my code efficient yet deliver on time?

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• How to boot into Ubuntu after installing into a pre-installed Windows 8 pc?

  - by xVerified

  I recently just installed Ubuntu 13 from a USB drive. I have/had Windows 8 64 bit on my desktop computer. When I restart and boot my computer, there is not an option that allows me to choose Ubuntu, it goes straight to Windows 8. I understand this is a common issue. However, my main question is, how do I get to even GO INTO Ubuntu after it's installed? I don't mind booting into Windows 8 at first, but how can I even choose to see Ubuntu now that it's installed?

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• Problem with Using chntpw in Ubuntu to reset Windows 7 Password

  - by sandesh yadav

  I tried resetting the password of windows 7 Using 'chntpw' command in Ubuntu . It showed success . But when I try to login from Windows it does not seem to be changed. I first used live USB of ubuntu 11.10 and did ''Try Ubuntu''. Then I did sudo apt-get install chntpw and then cd /media/Vista/Windows/System32/config sudo chntpw -u username sam . I did according to this link . http://www.psychocats.net/ubuntucat/resetwindowspasswordold/ and got success like this. Hives that have changed: Name 0 Write hive files? (y/n) [n] : y 0 – OK . But when I try to login to windows with blank password , I could not login. I also tried changing the password and showed success but I could not login with that password . Thank you . Any help is very much appreciated.

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• Better way to search for text in two columns

  - by David

  Here is the scenario. I am making a custom blogging software for my site. I am implementing a search feature. It's not very sophisticated - basically it just takes the search phrase entered and runs this query: $query="SELECT * FROM `blog` WHERE `title` LIKE '%$q%' OR `post` LIKE '%$q%'"; Which is meant to simply search the title and post body for the phrase entered. Is there a better way to do that, keeping in mind how long it would take to run the query on up to 100 rows, each with a post length of up to 1500 characters? I have considered using a LIMIT statement to (sometimes) restrict the number of rows that the query would examine. Good idea?

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• Lost /boot partition

  - by s3v3n

  Recently I installed Windows XP on my machine where I had only Ubuntu. The problem is that I had my /boot on a separate, 200 Mb partition at beginning of the hard-disk (the leftmost). Installing windows, it said that it can't write MBR because there's an unknown partition, so I formatted that partition as NTFS, and I could finally get windows installed. Now I want to restore that partition so I can use my Linux keeping both systems. Now should I install grub2 there, or it's OK by restoring partition data? If the first is the correct answer then provide me a little tutorial on installing it. Keep in mind that there was my /boot folder.

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• unable to display index.php

  - by user1683645

  I'm trying to load a website I've development and transferred from windows to ubuntu. I've installed apache2/php5/mysql and I've confirmed that it works by using the default index.html file displaying something like "It Works!". I've also created arbitrary folder containing some php file that I've run in firefox and it was displayed. But when I try to run my projects index.php I get a blank screen. I've consulted mirc about this and they say that it has to do with file permission. I've chcked the file permission on my index.php file and it is owner : rw r , group : r, others : read-only and execute is unchecked. What am I doing wrong?

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