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• Next in Concurrency

  - by Jatin

  For past year I have been working a lot on concurrency in Java and have build and worked on many concurrent packages. So in terms of development in the concurrent world, I am quite confident. Further I am very much interested to learn and understand more about concurrent programming. But I am unable to answer myself what next? What extra should I learn or work on to inherit more skills related to Multi-core processing. If there is any nice book (read and enjoyed 'concurrency in practice' and 'concurrent programming in java') or resource's related to Multi-core processing so that I can go to the next level?

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• Error when adding indicator in quickly

  - by tachyons

  I just started new project using quickly Eevery thing work perfectly .I decided to add an indicator to my program I used the command quickly add indicator using the command quickly add indicator . After that my project stoped working It shows the following error quickly run /usr/lib/python2.7/dist-packages/gi/overrides/Gtk.py:391: Warning: g_object_set_property: construct property "type" for object `Window' can't be set after construction Gtk.Window.__init__(self, type=type, **kwargs) Traceback (most recent call last): File "bin/mytube", line 33, in <module> mytube.main() File "/home/aboobacker/mytube/mytube/__init__.py", line 33, in main window = MytubeWindow.MytubeWindow() File "/home/aboobacker/mytube/mytube_lib/Window.py", line 35, in __new__ new_object.finish_initializing(builder) File "/home/aboobacker/mytube/mytube/MytubeWindow.py", line 24, in finish_initializing super(MytubeWindow, self).finish_initializing(builder) File "/home/aboobacker/mytube/mytube_lib/Window.py", line 75, in finish_initializing self.indicator = indicator.new_application_indicator(self) File "/home/aboobacker/mytube/mytube/indicator.py", line 52, in new_application_indicator ind = Indicator(window) File "/home/aboobacker/mytube/mytube/indicator.py", line 20, in __init__ self.indicator = AppIndicator3.Indicator('mytube', '', AppIndicator3.IndicatorCategory.APPLICATION_STATUS) TypeError: GObject.__init__() takes exactly 0 arguments (3 given) How to fix it ?

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• How can I play a DVD-A (DVD-Audio) disc?

  - by Marek Grzenkowicz

  I was able to play such a disc using VLC, but I am wondering if any music player supports the DVD-A format. UPDATE: I checked Rhythmbox and Banshee - I found no option like Play Disc or Open Disc, so I have no idea how I could even try to start playing a DVD-A disc. This has also nothing to do with missing plug-ins or codecs - the packages gstreamer0.10-plugins-ugly, gstreamer0.10-plugins-bad and ubuntu-restricted-extras were installed on my machine before. I guess I am stuck with VLC (Totem shows a DVD menu, but then hangs). However, I am missing the regular music player experience - ability to change order of tracks, adding tracks to a playlist, listening only to selected tracks, etc. I found Idea #22415: Please add full support for DVD-Audio and LPCM at Ubuntu Brainstorm.

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• How to load with "simplegame" mode after cooking?

  - by Emran Bayati

  i got a problem after i cook my game in Frontend (udk) ! Every thing is ok during the Cook operation i mean i compiled my scripts,it's ok there's no problem in this step,and i cooked my packages it's ok too ! no problem just like last step. so before i package the whole game;i'll lunch it and see if every thing is ok ! but when i load the game it'll load whit the Unreal tournament default game type ! i mean i don't want it to load with this type ! i want it to load with the "simplegame" game type ! i need to say that i set game type to "simplegame" in the Editor from View world Properties Game Type! but still it's loading with Ut game mode when i cook the game ! I just want load my game in "Simplegame" mode after cooked. if any one can help ! plz help ! Tnx Alot Emran Bayati

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• Can't enable Bluetooth 13.10

  - by user205872

  I'm a new user to Ubuntu. I previously installed Xubuntu 13.04 on my Compaq nx8420 and was able to use Bluetooth with no issues. I recently performed a clean install of Ubuntu 13.10 (not Xubuntu), and now can't enable bluetooth. I go to the default Bluetooth app, move the slider to 'On' and it slides straight back to 'Off'. Do I need to install any extra packages or use an alternative app to get Bluetooth working? I can't think of a reason why it would work in Xubuntu 13.04, but not Ubuntu 13.10. Thanks in advance for any help. Zac

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• How can I make the Ubuntu Software Center load?

  - by Kieran

  I launch it and it goes grey for almost immediately. Closing it prompts me to "force close" and no error report is given. I launched it in Terminal and this was the resulting log: 2012-11-23 22:39:25,175 - softwarecenter.ui.gtk3.app - INFO - setting up proxy 'None' 2012-11-23 22:39:25,179 - softwarecenter.db.database - INFO - open() database: path=None use_axi=True use_agent=True 2012-11-23 22:39:25,409 - softwarecenter.backend.reviews - WARNING - Could not get usefulness from server, no username in config file 2012-11-23 22:39:25,412 - softwarecenter.fixme - WARNING - logs to the root logger: '('/usr/lib/python2.7/dist-packages/gi/importer.py', 51, 'find_module')' 2012-11-23 22:39:25,412 - root - ERROR - Could not find any typelib for LaunchpadIntegration 2012-11-23 22:39:25,474 - softwarecenter.ui.gtk3.app - INFO - show_available_packages: search_text is '', app is None

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• Installing gdm on headless Server Edition

  - by Andrew Koester

  I have Ubuntu Server running on a headless box, which is right now, almost entirely doing only software RAID and feels a little underused. I'd like to get into using Ubuntu as a desktop a little more. What do I need to do (install/etc.) to get Gnome while keeping the box itself headless? I'm not sure which packages to install or which steps to take. I figure I'll just use X over the network (Xming or the like) but something like NX might work.

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• Ubuntu 12.04 "Shutdown" or "Restart" logs out

  - by jenls

  While logged in as a sudo user, click the right top power icon, then select and click "Shutdown" menu, it comes up with a dialog asking if I want to close all programs. The dialog has two options: restart or shutdown. Choose either one logs me out. Syslog has the following line about restart: WARNING: Unable to restart system: Authorization is required This happened after I installed NTP and some OpenStack packages while working in a prototype project. My Ubuntu's software is up to date as of this writing. Anyone encountered the same problem in 12.04?

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• Getting Started with 2d Game Dev (C++): DirectX or OpenGL?

  - by Dfowj

  So, i'm a student looking to get my foot in the door of game development and im looking to do something 2D, maybe a tetris/space invaders/something-with-a-little-mouse-interaction clone. I pointed my searches in the direction of C++ and 2d and was eventually lead to DirectX/OpenGL Now as i understand it, all these packages will do for me is draw stuff on a screen. And thats all i really care about at this point. Sound isn't necessary. Input can be handled with stdlib probably. So, for a beginner trying to create a basic game in C++, would you recommend DirectX or OpenGL? Why? What are some key feature differences between the two? Which is more usable?

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• Update Manager offers 900+ updates under partial upgrade mode

  - by TriforceLZG

  Today I checked for updates and got an error message telling me I must do a partial upgrade. I was shocked to see how many updates there were available. 900+ Updates! By using synaptic I found out that it wanted to remove core packages from my system, such as compiz and python, but also update some as well. I am very confused why package manager would want to do this all of a sudden, and why it wants to destroy my system. I really need an answer, because I now cannot update my system.

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• Depends on lib32gcc1 , libc6-i386 , can't install neither

  - by user2328765

  I tried to install catalyst for my Radeon Graphics on 13.10 , but looks like everything went wrong . Now I can't install any software , and the software center says : The following packages have unmet dependencies: fglrx: Depends: libqtcore4 (>= 4:4.5.3) but 4:4.8.4+dfsg-0ubuntu18 is installed Depends: lib32gcc1 but it is not installed Depends: libc6-i386 but it is not installed xserver-xorg-video-intel: Depends: xorg-video-abi-13 but it is not installed I am a noob , thus I really don't know what to do . I tried to install lib32gcc1 and libc6-i386 via apt-get and it didn''t work also for unmet dependecies . I downloaded .deb package of libc6-i386 but I couldn't install it. any help ?

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• How can I copy/paste files via RDP in Kubuntu?

  - by Dai

  I recently installed the latest Kubuntu (x64) on my work machine as I am trying to migrate away from Windows. Unfortunately I use RDP very frequently to connect to customer's servers and need to be able to copy files across. I have tried the following packages with no luck: remmina rdesktop xfreerdp My latest attempt to solve this involved connecting one of my folders to the remote server, here is the command I used to launch rdesktop: rdesktop -5 -K -r disk:home=/home/dai -r clipboard:CLIPBOARD -r sound:off -x l -P 192.168.0.2 -u "administrator" -p pass The servers are not all running the same version of Windows, the one I've been trying so far is running Server 2003 R2. Customer servers range from Server 2000 to Server 2008. I've been Googling this like mad but all the solutions I find seem to fail, maybe because almost all the help out there assumes that I'm running Gnome. Sorry if this is a stupid question. Thanks in advance for your help. Edit: Copying and pasting text seems to work just fine, but that's not what I need.

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• Download mirrors down after fresh installation

  - by user169866

  I dont know whats the problem but it seems after every fresh installation of ubuntu in any device (have started noticing this problem since ubuntu 11.04) the connection to the software sources are down. I cannot download any software from either apt-get or software center. Also i cannot use the Universal Source for packages like chromium, etc. And then suddenly after a few days, the mirrors are back up again!! Its normal back again! I dont know what the problem is, but it happens every time. Is there any solution to this or we just have to wait for a few days till the mirrors are back again? (and I have also tried changing the download server, It doesn't helps!)

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• How will Qt 5.0 be packaged for Raring?

  - by George Edison

  Note: as per the FAQ, "Issues with the next version of Ubuntu" may not be asked as questions here but in my opinion, this is not an issue but merely a question asking about policy. If you feel this question is off-topic, please leave a comment explaining why or open a question on Meta.AU. How will Qt 5.0 be packaged for Ubuntu when it is released? Currently, the name of the package for installing the Qt 4.8 core libraries is: libqt4-core Will the equivalent package for the next version of Qt (5.0) be named libqt5-core? If not, what will the package be named? Will the existing Qt 4.8 libraries coexist with the Qt 5.0 equivalents for the foreseeable future or will they be removed? The Qt 5.0 beta 2 PPA contains a lot of packages - few of which seem to correspond with existing package names. If someone can provide me with a link to a policy outlining the Qt 5.0 migration plan, that would be awesome.

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• Trouble after Ubuntu 12.10 upgrade

  - by highsciguy

  Over night I tried to upgrade to (k)ubuntu 12.10. Unfortunately kdm (neither lightdm) doesn't show up after boot. I found several posts describing errors due to the migration from kdm to lightdm. Some sugest reinstallation of kdm. Therefore I logged into a shell and tried to install it using apt-get. However it turned out that network is not available. ifconfig showes that only the loopback device lo is available. What can I do to get lan or wlan network working on the commandline? I relized that grub still runs the old tuxonice kernel which I installed from ppa. Is it possible that the installation didn't finish and left me in an inkonsistent state in which the kernel version does not match the modules? How can I proceed the installation from the downloaded packages?

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• How do I restore the privacy pane of the system settings?

  - by Sparhawk

  Checking out screenshots of the system settings in Ubuntu 12.10, it seems that I am missing a few. When I open up my settings, I cannot see Privacy, Backup, and Management Service. Also, nothing comes up when I search the Dash for these words. In a previous edition of Ubuntu, I purged Ubuntu One (with sudo apt-get purge ubuntuone-client python-ubuntuone-storage* ubuntuone-couch ubuntuone-installer) and appropriately, I cannot see the Ubuntu One icon. I've also previously purged unity-lens-music Perhaps I purged some metapackage that removed the others? In any case, how do I restore the privacy pane (as well as the other icons)? Also, any suggestions for what I did to remove the packages in the first place (and hence how to avoid this problem in the future)?

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• Upgrade fails because of blcr-dkms

  - by Peter Smit

  When I try to update my Ubuntu 10.04 installation to 10.10 I get the following error. Could not calculate the upgrade An unresolvable problem occurred while calculating the upgrade: Trying to install blacklisted version 'blcr-dkms_0.8.2-13' This can be caused by: * Upgrading to a pre-release version of Ubuntu * Running the current pre-release version of Ubuntu * Unofficial software packages not provided by Ubuntu If none of this applies, then please report this bug against the 'update-manager' package and include the files in /var/log/dist-upgrade/ in the bug report. None of the three applies to me (I think). Now I found that this also affects someone else: https://bugs.launchpad.net/update-manager/+bug/657662 Is there here someone who knows what could be wrong? Or a workaround so that I can install Maverick Meerkat?

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• Building ASP.NET Web Forms to Use a MySQL Database

  The MySQL database is the best open source database which means it can be used for free without obtaining or paying for a license. In ASP.NET 3.5 hosting there are some hosting packages that let you use the MySQL database because it can be a cheaper hosting alternative when compared to using the MS SQL database. However things can be a bit complicated when querying a MySQL database in an ASP.NET environment.... Advance Your IT Career Online IT Degree Programs. Advance Your IT Career While You Work. Search now.

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• How can I remove new kernel versions after downgrading?

  - by Pawel

  i have some problem. First i upgraded ubuntu to 12.04 and all of packages. But after that i have a lot of problems so i decided to downgrade to 11.10. After i did that i have two kernels 3.2.x and 3.0.x. I found a lot of solutions how to remove older kernels but i have no idea how to remove newer kernel ? I dont see 3.2 kernel when im using a 3.0 kernel. But i see it in grub. When i type uname -r in terminal i see only 3.0.x kernel which im using at the moment.. Any solutions to delete 3.2 kernel ?

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• Technically speaking, what is different about Ubuntu compared to other Linux distributions?

  - by Ross

  This is a question that's puzzled me for quite a while (and refers to the differences between all distributions). In my mind, a distribution is: a pre-configured OS, with some pre-installed packages, some created by the distribution's community that are unique to that distribution (e.g. apt-get). I'm not sure my definition is right as I feel there's something else. I'm really interested in setting up my own ArchLinux distro (which starts as a very minimal barebones system that you expand yourself) but feel I need to understand this first.

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• Windows no longer display with proprietary ATI Catalyst drivers

  - by Insomniac

  I recently started having an issue that opening any application would would show nothing on screen. At the time I noticed it I assumed it was an incompatibility between the new 14 update so reinstalled the old 13.10 iso I used originally. I have now tried a range of ATI drivers including the latest and the exact file I installed the first time with the same results. I can only assume then that it is one of the updates applied at some point, but have no idea which one or how I would go about rolling these back or getting earlier versions of packages. Is anyone else getting this issue? The system has 2 ati 6850s installed, not in crossfire. The open source drivers work fine but I need the ATI ones for cgminer to work.

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• how do I go about removing all the language packs I don't need

  - by knotech

  I just noticed that in /usr/share/help I have the ubuntu help files in 70 different languages. I only speak 2, and I only really compute in one. I also noticed that it is full of broken symbolic links to /usr/share/help-langpack. I want just want to get rid of all the languages I don't need. How can I do this without getting all rm -r happy? I'm preferably looking for a way to do this without installing any new packages, as my main goal is to get rid of excess stuff on my machine. I'd like to find a way to do this preferably with dpkg, or apt.

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• Debian Stable vs Ubuntu LTS for Server?

  - by Kevin

  Quick question: Which is a better platform for a professional use server? Debian Stable or Ubuntu LTS? The third party software we plan to use, works on both. Which one is better on it own merits? Take into account things like the kernel (Ubuntu for example has its own custom kernel for servers), and other Ubuntu specific customizations. I keep switching back and forth, and I need to decide so I can recommend one or the other to a client. Right now, I think I am going to choose Debian Stable. Recently, I have had Ubuntu Server Edition 10.04.1 have a few strange issues... I have Ubuntu setup to do automatic updates via a simple script, and every few months or so, libapache2-mod-php5 gets removed because of conflicting packages... Thereby causing me to loose the php function of the web server. Debian Stable has not done anything like this.

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• VSDB to SSDT Series : Introduction

  - by Etienne Giust

  At the office, we extensively use VS2010 SQL Server 2008 Database Projects and SQL Server 2008 Server Projects  in our Visual Studio 2010 solutions. With Visual Studio 2012, those types of projects are replaced by the  SQL Server Database Project  using the SSDT (SQL Server Data Tools) technology. I started investigating the shift from Visual Studio 2010 to Visual Studio 2012 and specifically what needs to be done concerning those database projects in terms of painless migration, continuous integration and standalone deployment. I will write my findings in a series of 4 short articles: Part 1 will be about the database projects migration process and the cleaning up that ensues Part 2 will be about creating SQL Server 2008 Server Projects equivalents with the new SSDT project type Part 3 will introduce a replacement to the vsdbcmd.exe command used for deployment in our continuous integration process Part 4 will explain how to create standalone packages of SSDT projects for deployment on non accessible servers (such as a production server)

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• How do I install third-party rhythmbox plugins?

  - by fossfreedom

  Now that the dust has settled and Rhythmbox has become (again) the default music-media player in 12.04, I'm interested in extending its functionality. For example, the default lyric plugin does not work for me and there doesn't appear to be an sound-equalizer by default. Having done a search, I came across the Gnome-website that lists a number of third-party plugins, some-of which I wish to install which can resolve the above. However, there doesn't appear to be .deb packages or a repository containing these plugins. Instead there are links to source-code websites such as GitHub and others. So, I'm confused - I don't know which plugins works in 12.04 Rhythmbox and I'm not sure how to install these. Help please?

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