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• Wifi very slow on Ubuntu 12.04 but not on Win7, need help

  - by user84504

  I have an enormous problem: I've a Sony Vaio VGN-NR21S with win7 and Ubuntu 12.04 in dual boot. With Windows everything is fine (except that is windows) but with Ubuntu the wireless connection is awfully slow, basically unusable. I've already search for similar discussion but the solution proposed didn't worked. I've noticed this issue also in live mode both with ubuntu and linux mint. I've installed Ubuntu onto an Acer that shows the same problem when connected via wifi to my router, so I think that maybe the issue is about compatibility with my home router. I really need help, I don't want unistall ubuntu! Please tell me which output u need to help me, thanks.

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• juju: How do I list all the relation variables and debug them interactively?

  - by mfisch

  I'm writing a charm that requires a mysql database, I found from looking at other charms that this (below) is how I get the info about the database: user=`relation-get user` password=`relation-get password` mysqlhost=`relation-get private-address` But I just found that from reading the wordpress charm example, is there a way to show all the relation variables that I can use? Also, while debugging my db-relation-changed script, I wanted to ssh into my host and interactively run those commands, for example relation-get user, but it didn't work. I resorted to having to restart everything and use juju log to print them out. This wasted a lot of time. Is there a way to print out these relations, either from my dev box or from the instance running my charm? (Below is what happens when I tried to interactively run relation-get): ubuntu@mfisch-local-tracks-0:~$ relation-get user usage: relation-get [-h] [-o OUTPUT] [-s SOCKET] [--client-id CLIENT_ID] [--format FORMAT] [--log-file FILE] [--log-level CRITICAL|DEBUG|INFO|ERROR|WARNING] [-r RELATION ID] [settings_name] [unit_name] No JUJU_AGENT_SOCKET/-s option found

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• What does /dev/null mean in a shell script?

  - by rishiag

  I've started learning bash scripting by using this guide: http://www.tldp.org/LDP/abs/abs-guide.pdf However I got stuck at the first script: cd /var/log cat /dev/null > messages cat /dev/null > wtmp echo "Log files cleaned up." What do lines 2 and 3 do in Ubuntu (I understand cat)? Is it only for other Linux distributions? After running this script as root, the output I get is Log files cleaned up. But /var/log still contains all the files.

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• Writing Ubuntu shell scripts

  - by Lukesh

  Write a script that will shut down one of your server called “appsserver” every night in order to preserve power. But before the appsserver is brought down, your script should do the following: Check if there are any users logged into the appsserver Check the size of the directory /usr/tmp is bigger than 1G and delete all its content. If (a) is true, send a broadcast message to all user that the machine will shut down in 20 minutes and that they should log out of the appsserver All the output of the commands in your script should be sent to a log file with the script running date appended to the log file itself (e.g. shutdown_14_Nov_2011.log).

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• cannot connect to wireless network on ubuntu 12.04

  - by angjinhang

  i have installed ubuntu on my 6-year-old Acer Aspire 4310 and i love it's lightning speed.but, now i have a big problem, that is it cannot connect to any wireless network. the wireless network worked well in my windows. the wireless switch is not responding to me(i guess it only works on windows). there are also no wireless toggle switch on my keyboard. i have installed my driver, yeah, a proprietary driver. i installed it, and my i never see my wireless network anymore, even the enabling and disabling button in the system settings. i can connect my wireless network during the ubuntu installation. so what's the problem? i cannot find wlan0 in the ifconfig output. i can still see the enable and disable button in the system settings before i install the driver. now even i remove the driver, i will no longer display. i wanted my wifi back, help!

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• Logic in Entity Components Sytems

  - by aaron

  I'm making a game that uses an Entity/Component architecture basically a port of Artemis's framework to c++,the problem arises when I try to make a PlayerControllerComponent, my original idea was this. class PlayerControllerComponent: Component { public: virtual void update() = 0; }; class FpsPlayerControllerComponent: PlayerControllerComponent { public: void update() { //handle input } }; and have a system that updates PlayerControllerComponents, but I found out that the artemis framework does not look at sub-classes the way I thought it would. So all in all my question here is should I make the framework aware of subclasses or should I add a new Component like object that is used for logic.

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• Do unused vertices in a 3D object affect performance?

  - by Gajet

  For my game I need to generate a mesh dynamically. Now I'm wondering does it have a noticeable affect in FPS if I allocate more vertices than what I'm actually using or not? and does it matter if I'm using DirectX or OpenGL? Edit Final output will be a w*h cell grid, but for technical issues it's much easier for me to allocate (w+1)*(h+1) vertices. Sure I'll only use w*h vertices in indexing, and I know there is some memory wasting there, but I want to know if it also affect FPS or not? (Note that mesh is only generated once in each time you play the game)

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• ASP.NET Combo Box - Incremental Filtering Using 'Contains' v2010 vol 1

  The ASPxComboBox editor now supports searching for items using the new contains filter mode when using the incremental filtering feature. Find As You Type Filtering Based on the text thats typed into the editor's input box, the ASPxComboBox will incrementally filter on the client side. The following filter modes are available for you: None - Filtering is not applied to list items. StartsWith - The editor is filtered for list items that begin with the search string. Contains -...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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• C# double &amp; nary for loops

  - by MarkPearl

  Something that I wasn’t aware was possible in C# was double for loops… they have the following format. for (int x = 0, y = 0; x < 10; x++, y=x*2) { Console.Write("{0} ", y); } Console.ReadLine(); This would give you the following output… 0 2 4 6 8 10 12 14 16 18 In fact you can use as many variables as you want, the following would also be valid… for (int x = 0, y = 0, z = 10; x < 10; x++, y=x*2) { Console.Write("{0} ", z); } Console.ReadLine();

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• Finding out which tile a mouse click landed in

  - by Shard

  I am working on an icometric grid based game and im having an issue trying to link a mouse click from the user to a tile. I have been able to split the problem into 2 parts which is first finding a rectangle that sourounds a tile, which I have been able to do but the second part of figuring out from the rectangle which tile the click landed in has got me stumped. Here is an example of a rectangle with tiles on the inside: The rectangle is 70px long and 30px high so if i use an input of say 30x(top)/20y(left) how would I go about determining which tile this fell into?

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• Writing a basic C Shell - understanding argv[] [on hold]

  - by Flame

  I have an assignment for my class to write a basic C Shell. I have found many pages that explain parts of it and some fully implemented code. I'm not going to copy, i'm just using it right now as a way to get started. So I'm at the beginning of this project obviously. One example I am looking at parses the user's input and stores a pointer to the beginning of the argument in char *argv[3]; Am I just misunderstanding this or would this technically break if there are more than 3 arguments? (say /a.out arg1 arg2 arg3 etc). Would I wanna malloc this somehow? I know a.out is considered argv[0], and the arguments argv1 - however many there are. It's probably bad practice to have too many arguments for a program, but I still would at least want to address it as I don't know what my TA's are going to use to test my shell.

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• Radeon HD5570 HDMI Video Card 5.1 Audio doesn't work

  - by ryandlf

  I am using Ubuntu and XMBC on my HTPC and have chosen the Radeon HD5570 Video card which has an HDMI output. In the sound preferences there is no surround sound option for the video card just stereo and although I can get sound through it in XBMC, my receiver does not state Dolby Digital on movies that are in fact Dolby so its definitely not giving me the true sound it should. Does this card not support surround sound through HDMI and I somehow missed it? If that is the case does anyone have suggestion that has been tested and works? Id like to know its going to work before investing in yet another video card. UPDATE I purchased a Nvidia GeForce GTS 450, plugged it in, downloaded the proprietary driver from the system control panel, disabled the onboard audio from the BIOS (not sure if this was necessary but I did it anyways), and changed the sound settings to use the new video card. Everything works flawlessly. It was a seemless setup.

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• reading k&r(c book) and confusing 1st chapter code [closed]

  - by DarkEnergy

  #include <stdio.h> /* copy input to output; 2nd version*/ main() { int c; while ((c = getchar()) != EOF) putchar(c); } this is very confusing... since you never escape the while loop. I've learned that EOF is -1. i type -1 but it just reprints it. It's a never ending loop. Over time did the library get changed and differs from what the book intended it to be? when i say library i mean the putchar()/getchar() that's in the library... sorry.

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• How to determine the size of a package in terminal prior to downloading?

  - by user14590

  When using apt-get install <package_name>, and there are dependencies that need to be downloaded, the terminal outputs names of additional packages and total size, and asks for confirmation before downloading. But, when dependencies are satisfied and nothing but the named package needs to be downloaded there is no size output and no confirmation. When using Synaptic, I can see the total size that new packages that will use after installation but no way to see the size that needs to be downloaded, except to go from package to package and use properties to see the compressed size. I would like to know if there is a way to see the size of a package(s) in terminal and Synaptic prior to downloading and installing it/them?

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• How should I setup billing for AdWords when managing a client's campaign in My Client Center? [closed]

  - by Dustin

  I have worked with Google AdWords before and will now be managing an AdWords account for a client. I have a My Client Center account, but I'm wondering what the best practices are for billing. Should I link billing to my own credit card and then have the client pay me (they have to pay me to manage the account anyway), or should I have the client pay Google directly? How is this usually done? If it is the later, what is the best way to have them input their payment info?

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• BizTalk 2009 - Size Functoid Fun

  - by StuartBrierley

  Recently when mapping a flat file from a third party source, I needed to check whether some elements had been sent with any content or not. In the source message these elements were being supplied in the form: <comment /> I though I would try using the size functoid, assuming that it would return a size of 0 for these empty elements.  What actully happens is that the Size funtoid returned a size of 1 rather than the 0 I was expecting. To get what I considered to be the correct output I needed to add a String Right Trim functoid before the Size functoid.  This then returned the "required" size of 0.

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• Unable to record from USB sound card line-in connector

  - by tete

  I've been googling and struggling with this for a while but haven't been able to make this work. I bought a USB sound card (Encore ENMAB 8-CM) to record from its line-in connector. I'm not sure which input to pick in Audicity, but I'me sure I've tested them all. These are all the available inputs I have in Audacity. But there's no sound being recorded at all. I've already checked the device is working, so I really don't know if I'm doing something wrong. Any help will be very appreciated. Cheers.

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• Can all code be represented as a series of Map / Filter / Reduce operations?

  - by Mongus Pong

  I have recently been refactoring large chunks of code and replacing them with Linq queries. Removing the language bias - Linq is essentially a set of Map / Filter and Reduce operations that operate on a sequence of data. This got me thinking, how far would I theoretically be able to take this. Would I be able to rewrite the whole code base into a series (or even a single) of Map / Filter and Reduce operations. Unfortunately I get paid to do useful stuff, so I haven't been able to experiment much further, but I can't think of any code structure that couldn't be re structured as such. Side effected code can be dealt with via monads.. Even output is essentially mapping memory addresses to screen addresses. Is there anything that couldn't be (theoretically) rewritten as a Linq query?

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• How do I set a custom resolution in 12.04 with a nVidia video card (9600 GSO)?

  - by Aaron Agarunov

  I have 32 bit 12.04 and my video card drivers are up to date at "304.64" yet my resolution appears capped at 1920x1080. I am trying to get the resolution to 2560x1440 or even higher, as I am running this machine on a 42" LCD through HDMI and the 1920x1080 resolution will not stretch to fit the screen and is therefore fairly zoomed in. The 9600 GSO supports up to 2560x1600, so this should be no problem for the card itself. I have tried using xrandr, which successfully creates the 2560x1440 60 hertz mode but does not allow me to --addmode or --output it in. I have tried working with the xorg.conf, but I actually can not find a way to create the file since when I try to, I am given an error message stating that the # of monitors I have does not match the # of screens I have. Can anyone provide some help or insight?

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• Books about Windows Os Programming [closed]

  - by LostInLib

  I'm trying to develop a desktop application which is similar to CCleaner. But I'm having problems with R&D resources... I can't find good books about Windows Operating System Programming Topic Examples; Explaining Windows 7 (or even 8) registry. Which registry entry turn on/off "showing desktop icons" Or, What is Windows registry defrag?, How can you defrag registry?, How can you optimize windows startup for( Windows 7 ) etc. I googled my questions, find msdn-some stackoverflow topics etc. But I can't find a book about low-level explaining current windows 7 operating system... What I'm missing ? Thanks for your any input... and sorry, I don't know is this the right place to ask that question, but I asked anyway...

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• Ctrl-R Not Working in SSMS After a Patch?

  - by andyleonard

  I whined about this recently on Facebook. After that, I did something practical: I searched for a solution. I found a workaround at Connect : Open SSMS Select "Tools", "Customize..." - Click "Keyboard..." - In the list window, scroll down and select "Window.ShowResultsPane" - Under "Use new shortcut in:", select "SQL Query Editor" - Place your cursor in the "Press shortcut keys:" input area and press Ctrl+R - Click "Assign",...(read more)

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• Bluetooth no longer working?

  - by user68733

  I am using a Toshiba Portege A600 and have been using Ubuntu for about a year now. When I first installed Ubuntu "10.10", everything worked fine, including bluetooth. I was able to send and receive files. After upgrading to 11.04 and then to 11.10, bluetooth functionality decreased. I was able to view bluetooth devices, but not be able to pair or connect to them. Now, on 12.04, bluetooth is no longer recognised at all. When I open up the Bluetooth settings application, it says "No Bluetooth Adapters found". What is the cause of this, and how can I fix it. I have included the output of sudo lshw. http://pastebin.com/09w0vkfu Thanks!

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• Tell the CDI 2 Expert Group What You Think!

  - by reza_rahman

  Since it's introduction in Java EE 6, CDI has become a key API for the platform. CDI 1.1 was a relatively minor release included in Java EE 7 as was CDI 1.2 (to be included in GlassFish 4.0.1). We have much higher expectations from CDI 2 (projected to be included in Java EE 8) under the new leadership of Antoine Sabot-Durand. Much like we conducted the Java EE 8 survey to solidify future direction for the platform, CDI 2 is now undergoing the same effort. Towards this goal the CDI 2 leadership is now soliciting feedback on some very specific items via an open survey. Topics include the likes of Java SE bootstrap, asynchronous processing, modularity, EJB-style @Startup and @Asynchronous in CDI, configuration and CDI Lite. You can of course also provide free-form input on anything that's not on the survey. Take the survey now on the CDI specification site and help shape the future of CDI 2 and Java EE 8!

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• Partition showing up twice under devices

  - by JohnReed

  I have an ntfs data partition on the same drive as my ubuntu 12.04 partition. I wanted to have this partition automatically mount at startup so that dropbox can start syncing at startup without me having to manually mount it (my dropbox folder is on the partition). I edited the fstab file by appending the following to it: #Data-Partition UUID=762639DE416D0A21 /media/Data ntfs-3g rw,auto,users,exec,nls=utf8,umask=003,gid=46,uid=1000 0 2 The drive now automounts at startup like I wanted, but now I have a duplicate Data entry under my Devices list. This only appeared after editing the fstab file. The second Data entry under Devices does not mount properly and I do not want it there. Why is this duplicate entry there and how can I get rid of it? additional information: Here is the output I get from cat /proc/partitions: major minor #blocks name 8 0 976762584 sda 8 1 102400 sda1 8 2 111574016 sda2 8 3 803643392 sda3 8 4 1 sda4 8 5 55410688 sda5 8 6 6028288 sda6 11 0 1048575 sr0

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• Thank You MySQL Connect Content Committee Members

  - by Bertrand Matthelié

  Yesterday we announced the publication of the MySQL Connect Content Catalog. We would like today to thank the MySQL Connect Content Committee members, and especially our external members, for their efforts helping us to build the best possible MySQL Connect program. The Call for Papers had generated a large number of great submissions (thank you all for that!) and it was indeed a tough job to select sessions among those. So thank you very much, Sheeri, Erin, Giuseppe, Calvin and Yoshinori! Your input has been invaluable. Learn more about MySQL Connect (San Francisco Sept 21-23). Register Now and Save US$500 with the Early Bird Discount.

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