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• HD 6770M low graphics mode after update (AGAIN)

  - by Pihkal

  I have Ubuntu 12.04 LTS (re)installed on this laptop: I've also installed the fglrx-drivers for my ATI card (using apt-get),it appeared to work fine,that is until i updated my distro. Once again i got the "low graphics mode" error when i booted into the new kernel,booting in the old kernel works fine however. When i look into the logs i see "no screen found". This is the second time i install Ubuntu and the second time i run into problems with my graphics. Reinstalling isn't a solution since the problem keeps comming back. My question now is: does anyone know a REAL solution for this issue ar at least knows what's causing it? Any help would be greatly appreciated.

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• OpenGL : Keeping alpha in a render buffer

  - by Cyan

  In my current task, i need to render a texture into a render buffer, in order to work on it (apply special filters) there. The result is then considered a "new texture", which is later displayed. This works fine, except when the texture contains some transparent/semi-transparent parts. My current guess it that, within the render buffer, the texture is "merged" with a kind of "grey background". In this case, it obviously impacts the R,G,B color components of transparent pixels. I've yet to find a way around this. Even manually assigning alpha after the rendering process doesn't save the day for semi-transparent pixels, which RGB are "tainted" by the grey background.

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• Some problem about Compiz and GTK on Ubuntu 14.04

  - by LVHoanh

  I installed Ubuntu 14.04 on my computer : i3/4G/750G/VGA Intel HD3000 & 1GB NVidia with CUDA GT540M. I've some problems with Ubuntu 14.04 : Does Ubuntu 14.04 support Emerald Theme Manager? Emerald Theme Manager is not available in Ubuntu Software Center? I installed Compiz and Compiz Setting Manager, it works ok, but the Windows 3D plugin is not work? The Shutdown/Restart function on Right-Top Panel is not work, is there any solution for this problem? The mouse theme I installed only work in current session, next time i restart computer it change back to default mouse theme? How can i resize the spacing between Desktop Icon? Waiting for everyone respond. Thankyou so much. P/s : My English is not good, expect you understand. :)

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• Handling large integers in python [migrated]

  - by Sushma Palimar

  I had written a program in python to find b such that a prime number p divides b^2-8. The range for b is [1, (p+1)/2]. For small integers it works, say only up to 7 digits. But not for large integers, say for p = 140737471578113. I get the error message for i in range (2,p1,1): MemoryError I wrote the program as #!/usr/bin/python3 p=long(raw_input('enter the prime number:')) p1=long((p+1)/2) for i in range (2,p1,1): s = long((i*i)-8) if (s%p==0): print i

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• Wireless doesn't work for me in Lubuntu but does in Puppy?

  - by user54871

  I am new to GNU Linux. I have been having trouble getting wireless working on my installed system of Lubuntu 11.10. It sees my WPA network but cannot connect even when I remove the password. Looking around for a different distro that might replace it, I was amazed to find that Puppy was able to connect to my wireless network without trouble, running off a USB stick. So this makes me think that my Lubuntu wireless problem might be fixable so I don't have to have the major hassle of backing up all my documents etc before installing a different distro to the laptop. Can anyone suggest some steps that might help me to fix wireless on Lubuntu, perhaps using the fact it works with Puppy? Thanks. Rob

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• What Languages are mostly understood "intuitively" and could benefit from a more formal learning approach?

  - by keppla

  In a presentation, i stumbled upon the Statement "JavaScript is a Language everybody uses, yet nearly noone seems to find it neccessary to learn how it works". And indeed, not many of the programmers i know could explain javascript's prototype concept, or why functions need to be 'bound' to this. CSS seems to be another example of this behaviour: everyone knows how to put a 'class' to an element, and to write a style .myclass { ... }, but only a few even know of margin-collapse. My question is: are there more of those languages, technologies, concepts, that are so prevalent that we dont even notice them as something worth learning while we use them?

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• Nautilus is extremely slow

  - by Maxim

  I am on Ubuntu 11.04. And Nautilus is very slow. It opens directories for 3-5 seconds even if a directory contains just a few small files. Even selecting of a file or directory with narrow keys is extremely slow and it rises my CPU usage up to 100%. It makes it almost unusable. But I noticed that if I start my nautilus as superuser: $ gksu nautilus then it works just fine. It is fast and responsive. So what can I do to fix this? Any help is really appreciated.

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• What soft can create deb repository with several versions of the same package?

  - by bessarabov

  I want to create my own deb repository to store some packages. I've tried reprepro and it works fine, except one but fundamental feature. Reprepro can't store several versions of the same package in the repository. But the ability to store several versions of the same package is essential to me, so I'm asking what soft can do such a thing. Here is a piece of reprepro FAQ that shows that it can't do it: 3.1) Can I have two versions of a package in the same distribution? ------------------------------------------------------------------- Sorry, this is not possible right now, as reprepro heavily optimizes at only having one version of a package in a suite-type-component-architecture quadruple. You can have different versions in different architectures and/or components within the same suite. (Even different versions of a architecture all package in different architectures of the same suite). But within the same architecture and the same component of a distribution it is not possible.

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• Recommendations for taskbar

  - by user210551

  I recently updated to Ubuntu 13.10 and now tint2 stopped working. Better yet: it works, I just can not see it as the all bar is now transparent. Since Tint2 is no longer maintained I doubt it will be updated hence I'm now looking into alternative is there are any. In short: looking for a simple taskbar that sits at the bottom of the screen and that lists applications per window (no groupping!). Don't need fancy animations or widgets/features. Any ideas?

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• How to Add a Google Call Widget to Any Web Page

  - by babblescribe

  Adding a Google Call Widget to your website or blog allows visitors to contact you using your Google Voice number. The widget provides an easy and cost-effective way to provide live customer support without the customer knowing your real number. The Call Widget works using Google Voice to first call the number the customer types into the widget form. Once connected, the user is prompted to connect to the number you have configured the widget to call. Google voice connects the two numbers and you are talking away in an instant.How To Encrypt Your Cloud-Based Drive with BoxcryptorHTG Explains: Photography with Film-Based CamerasHow to Clean Your Dirty Smartphone (Without Breaking Something)

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• Screencast: "Unlocking the Java EE Platform with HTML5"

  - by Geertjan

  The Java EE platform aims to increase your productivity and reduce the amount of scaffolding code needed in Java enterprise applications. It encompasses a range of specifications, such as JPA, EJB, JSF, and JAX-RS. How do these specifications fit together in an application, and how do they relate to each other? And how can HTML5 be used to leverage Java EE? In this recording of a session I did last week at Oredev in Malmo, Sweden, you learn how Java EE works and how it can be integrated with HTML5 front ends, via HTML, JavaScript, and CSS.

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• Keyboard Issues After Resuming From Sleep

  - by sammyd253

  I'm using Ubuntu 11.10 x64. It's running on my Dell Vostro V13. Everything works great until I shut the lid of my laptop (puts laptop into sleep). Once I come back and resume working in Ubuntu, typing becomes a chore. Ubuntu misses a lot of the keypresses from my keyboard. It usually results in me mashing my keyboard until the letter appears. A full system reboot fixes the problem. Again, typing is never an issue unless I resume from sleep. Any ideas?

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• How can I create a launcher and also have it in the apps toolbar

  - by Michael Durrant

  I want an app icon for smart git. I can create one on my desktop with $ gnome-desktop-item-edit ~/ --create-new and selecting the smartgit.sh app. That works for an icon on the desktop. How can I move that icon / create a new one in my applications toolbar (so not just on the desktop)? In my case that is the Unity applications toolbar (which I've moved to the left). I've tried dragging and dropping it there but it didn't work. I can make it appear in the dash home by adding an entry this way New App doesn't appear in Unity dash but I still can't move it to be an app icon in the apps toolbar.

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• How can I convince a project manager that there is no way to solve all the compatibility issues?

  - by SAFAD

  I have been working on this project for more than a year now, and we are close to release, the project manager wants the product to be perfect and working in every single aspect. I like that and I love working under the perfection idea, but it seems he is delaying the launch too much because of compatibility issues, he wants the product to work in every single installation, every single configuration possible, and in most cases, the product just works without issues when it's on the hands of the client. UPDATE : yes the product doesn't work properly when there are conflicts, for example, other products that don't use guidelines nor standards to load libraries (causes double library load which leads to failure), cache is another example and so on..... but we warn the clients about the conflict before purchasing and help them fixing it after purchasing I've tried to explain it by giving some examples on major products, he understands the situation, but can not believe that it is near impossible (if it is not impossible) to do what he wants. Hope it is clarified enough for the community to answer.

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• Engine Start and Stop Show Abnormal Behaviour

  - by Siddharth

  In my game, when I pause the game using mEngine.stop() it works perfectly but when I press resume button that has code mEngine.start() it provide some movement to the physics body. So the created body does not stand at its desire position after the resuming the game. That fault I have found in other game developed by other developer also. So please provide some guidance for it. I also tried with mScene.onUpdate(0) and mScene.onUpdate(1) but I does not able to found anything new from it.

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• Ubuntu 12.04 Hangs with Software Center open then opening Dash Home

  - by Josea

  I have a Dell D610 - Intel graphics - 1 Gig RAM. I have test the hard drive and RAM and both are fine. When I open Software Center, then Dash home my system locks up. The mouse cursor moves but is unresponsive if I try to right or left click anything. The keyboard is totally unresponsive and I have to hold the power button to power off! I have reinstalled from CD, did all updates but the issue persists. I tried using the track pad only, and I plugged in an external mouse also but no change. Everything else works great ! I am sick of running Vista and have no love for Metro! Thanks for any suggestions, on a scale of 1 to 10 (Newbie - Expert) I am about 3

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• How do I restore GRUB 2?

  - by uahug

  I upgraded my laptop with an SSD, moving my old HDD to where the DVD-drive was, so that I could have speed and storage. Now, I have reinstalled Ubuntu on the SSD, deleting all the partitions on the old HDD to make space for a data partition. But now the laptop doesn't even get to GRUB 2 if the HDD is plugged in! If I take it out, everything works, but as soon as I plug it in and retry to boot, I won't find GRUB. At first, I thought it was because of the boot order, but the order was OK: first the notebook hard drive (SSD) and then the CD/DVD drive (which in reality is the HDD). How can I fix it? Doing a simple grub-install /dev/sda doesn't work.. The SSD is sda, and the HDD is sdb.

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• How to replace avconv with (the real) ffmpeg and have it work right?

  - by u2n

  Anyone know how to install the real, current ffmpeg (not the older version by avconv that comes w/ Ubuntu) without having the problems mentioned here? Reasons: Everything works (or so many have written), Use the new syntax, and After some research -- and without getting into the controversy -- I simply believe the packagers made a mistake going with avconv. This is a fix. Apparently this isn't as easy as it should be due to versioning conflicts, and that avconv and ffmpeg can't coexist on the same machine (noted in the above post). Though at least one guide mentions installing ffmpeg locally (~) to achieve coexistence. My release is Precise 12.04.3 LTS, but it appears this would apply to newer ones also.

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• What is the most cross-browser/system compatible option for 3d graphics on a web page?

  - by LachlanB

  I would like to develop a bit of functionality for a web site that involves a bit of 3D - the user can move around objects, rotate them and texture them. So far I've looked into: WebGL (in particular three.js) and it looks great, but it's not supported in IE nor IOS. IOS supports the <canvas> tag, but only 2d. It looks like three.js has an unsupported hack to make a 3d thing use the 2d canvas instead without textures, but this looks like a hack. I also considered resorting to Flash which works on most browsers, but that won't work on IOS. What's my best option for doing 3d web graphics on the vast array of browsers and interfaces? At the moment I'm thinking WebGL for web (and ask people to use chrome or firefox, and take the hit on IE) and then maybe write a native app for IOS, but I am not sure if there are better alternatives available that I don't know of.

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• Ubuntu 12.10 shows no launcher or menu

  - by Guy Wms

  I have 'upgraded' to Ubuntu 12.10 from a previous nice version that always worked. I have installed from a CD downloaded from this site. I start the PC (HP Pavillion zv5200) and arrive at a signon screen which has my username and "Guest". This screen shows the menu at the top with power, time, calendar, etc. So I enter my password and I am taken to a screen which only shows a wallpaper, nothing else. If I move the mouse and 'push' against the left limit I do not get a launcher app. Nothing. The only thing that works is opening a terminal (ctrl+alt+F1). I have tried several of the hot-key combinations I've read about on the site but none do anything, nothing happens. Can anyone help? Thanks very much!

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• Working on the search

  The one thing I've always like working on and about this site, is the full text search engine and spider. Bascially it goes out and spiders all the major development blogs on the web, and then indexes them. The engine uses Lucene for it's index. Lucene is another open source project and it works really fast. Currently the directory is indexed, and the rss feeds are underway. We're talking about a lot of content, but once it's done you'll be able to pull podcasts, and videos as they get posted to...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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• Development methodology for single web developer?

  - by CaseTA

  I'm a web developer who mostly works with the LAMP stack when it comes to my own projects. Most of the time I just start coding on a project and fixing bugs and adding features as I go along. Often I'll try to use an existing solution such as Wordpress or Drupal. Now that I'm thinking of creating my own web application with businesses as the target group, I feel there's a need for proper analysis and design. Something lightweight for a one person project and still solid enough to handle requirements, user interfaces, security, etc. If you could recommend methodologies and literature I would be grateful.

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• How do i allow non-root access to /ttyUSB0 on 12.04?

  - by yurividal

  Since i updated from 10.04 to 12.04, i am unable to acces the device connected in /ttyUSB0 if i dont have root access. To be more specific, i use a usb-to-serial com port converter to acces and configure Cisco equipment with a software called Putty. It happens that, since i upgraded to 12.04, Putty only sees the connected device when i run it as "gksudo putty". If not, it says "unable to connect to port /ttyUSB0". I have managed to change the permissions via chmod 666, and it works, but if i disconnect the usb and reconnect, it goes back to root only. How do i permanently allow non-root access? I have a clue it might be via udev rules, but i have NO IDEIA how to do it. obs. Manufacturer and drivers "PROLIFIC"

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• Is it better to use a Database or a data structure for network stack?

  - by poly

  I've built a multi threaded messaging application in C and I'm currently using a MySQL Memory table to save the session ID, but I'm not sure whether this was a good decision or not. It works like this, the application sends a message and saves the source session ID in the MySQL table. When the application gets the success response it will remove the session's ID from the MySQL table, or if it received an error response then it will keep the ID to be retried later. I've built it this way so that I don't need to care about building a data structure by myself, and the Database provides flexibility when it comes to querying it. Do you think this is appropriate or do I need to use something else? Please note that the application is expecting to handle a large number of transactions/sec.

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• Apache 2.4 PHP 5.4 MySQL enabled but not found? [migrated]

  - by jurchiks

  Just tried setting up the latest Apache (2.4.1 x86 VC10 from apachelounge) and PHP (5.4 VC9 TS X86, with the php5apache2_4.dll) on my PC and ran into this weird problem; in my php.ini I have enabled all of the following: extension=php_mysql.dll extension=php_mysqli.dll extension=php_pdo_mysql.dll but when I try to print the available PDO's using this: print_r(PDO::getAvailableDrivers()); It gives me an empty array. PhpMyAdmin and MantisBT also refuse to work, saying that the mysql extension is missing. phpinfo() gives this: PDO PDO support enabled PDO drivers no value and when searching for mysql, only the mysqlnd section pops up... The DLLs are there in the D:/php/ext folder and no errors pop up when starting up Apache, as well as no errors in the Windows Event Log, and PHP itself has no error log anyway. What could possibly be the problem with this? Before this I had Apache 2.2.22 from apachelounge and PHP 5.3.9 and I had no problems. Now nothing works...

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