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Articles indexed Sunday November 13 2011

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• Touchpad two finger sensivity problem

  - by sagarchalise

  Having asked about touchpad not only once but twice. I have again come back to same topic :D. Basically I have a working two finger scrolling after adding the following line in /etc/profile after I enabled two finger scrolling in touchpad section of mouse. xinput set-int-prop "SynPS/2 Synaptics TouchPad" "Synaptics Two-Finger Pressure" 32 40 But my touchpad sensitivity quite irritates me as it jumps around sometimes and also behaves scrolling as well as right click on single finger sometimes. Anyone can suggest me any tips to minimize this if not avoid ? Anyone know if I could use pinch zoom(Finally got the right term:)) as my touchpad says it supports such activity as well? Thanks in advance.

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• Will Ubuntu 11.04 work on my old pc?

  - by M4tic

  It has an old SiS based graphics chip with 64mb memory, there were never 3D drivers for them. Ubuntu 10.10 doesn't even boot on it and my laptop, a Lenovo N200 with intel 9something graphics 128mb so I'm really worried. Broadband prices don;t come cheap in South Africa so the download has to be worth it. I can wait for the shipment but I've since orderd 10.10 and it hasn't come, so I don't know if I'm barred from using that service since I've been sent a disc every release.

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• How to set-up my own cloud server?

  - by WMRKameleon

  I am a student, 17 years of age and wanting to access all of my files at greatest ease. i would like to have a system like this: Computer A, B and C are the computers on which I work and to which the files should be available. Server A is located in my room and I can install Ubuntu on it. What is the goal? I want to edit files on computer A (e.g.) and computer A should update the file on my server, afterwards the server should update the files on computer B and C. (The same goes for editing files on computer B, afterwards the server has to update the files on A and C.) How am I able to set-up a network like this? It is about music, movies, pictures, documents... Thanks for those who are going to reply!

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• Screen tearing oddity when one window is on top of another with Radeon

  - by Kevin Qiu

  I have a mobility radeon 5850 running 11.04 and am running catalyst 11.10 drivers. I noticed that whenever I have two windows open, one of top of the other, scrolling results in minor screen tearing, usually around the border of the window on the bottom. When I minimize or close the bottom the tearing goes away. I have tear free desktop enabled and tried looking for this specific issue but couldn't find anyone else with it. It happens in both Unity and Classic. Is there any fix for this?

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• Ubuntu failed to detect monitor and very low resolution?

  - by Hiren

  I tried different versions of Ubuntu from 11.04 to 11.10 beta, but got same problem. My desktop pc configuration is, - intel core i5 2400 - DH67BL Motherboard - Inbuilt motherboard graphics - No extra graphics card attached - Acer-H193HQV 18.5" Monitor - 2GB RAM - 250GB Harddisk Problem : Ubuntu can't detect my monitor and saying it Unknown. Moreover, monitor's original resolution is 1366x768 but in the list of resolution there is only 1024x768 and 800x600 are there.

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• How can I edit/create new launcher items in Unity by hand?

  - by Ike

  Will Unity allow making custom launcher icons from .desktop files or via menu editing system? (Right now the launcher doesn't give the option to "keep in launcher" on all programs. For some programs I use, I have to make custom launchers or .desktop files. For instance, daily blender builds are generally just folders with an executable. In basic gnome or kde, I can make a new menu entry with the menu editing system. Then, I can also add it to docky either from the menu or by dragging a .desktop file to it. Unity launcher doesn't support drag and drop, so thats not a bug or anything, but when i open a .desktop file, it has unpredictable results. Most time it will not have"keep in launcher". Sometime it will have a pinnable item without the .desktop's icon, and if i pin the item to the launcher, it will not call upon the program again after closing it. I've also gotten it to just work with a .desktop file for "celtx".

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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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• Can't get activate_uri signal working when making a lens

  - by pub.david

  I'm trying to develop a lens for unity in ubuntu 11.10 and I can not get activate_uri signal working. This is an extract of my code: def _on_activate_uri (self, scop, uri): print "----> " + uri + "<-" ret=Unity.ActivationResponse.new(Unity.HandledType.HIDE_DASH,'') return ret and this is what I get back: TypeError: can't convert return value to desired type ../lens/appslens.py:230: Warning: g_object_get_qdata: assertion G_IS_OBJECT (object)' failed GObject.MainLoop().run() ../lens/appslens.py:230: Warning: g_object_set_qdata_full: assertionG_IS_OBJECT (object)' failed GObject.MainLoop().run() ../lens/appslens.py:230: Warning: g_object_unref: assertion `G_IS_OBJECT (object)' failed GObject.MainLoop().run() Does anyone has an idea where is my mistake ? Thanks in advance for your help

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• Ubuntu 11.10 UI changed suddenly?

  - by VeeKay

  10 64 bit on a Dell laptop that has 6GB RAM and 1GB graphic card. All of a sudden there were some sudden changes in UI which I am unable to understand why. The unity panel was initially glassy and transparent, now it looks all black in its background. Likewise the alt+tab graphics was working well until it got changed suddenly and now shows icons on pure white background. I've not tried to install any themes and I've not tried to tweak anything. Why did this UI changes occur? Could it be that it is unable to detect the graphic card or something? How can I fix this and how can I get back the original desktop back? Please help..

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• Graphics cards so I can have 4 monitors

  - by oshirowanen

  I currently have a single old graphics card to which I have connected 2 monitors giving me a big desktop of 2560x1024. If I get 2 of the following graphics card: http://www.ebuyer.com/238428-gigabyte-gts-450-1gb-gddr5-dual-dvi-mini-hdmi-out-pci-e-graphics-gv-n450-1gi Will I be able to connect to monitors per graphics card, giving me a total resolution of 5120x1024? I guess what I'm asking is, will I simply be able to stick both graphics cards in, plug the monitors in and will it all just work out of the box? I currently have 4 dvi monitors which have a native resolution of 1280x1024 each.

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• How does "rm" on a NTFS filesystem differs from Window's own implementation?

  - by DavideRossi

  I have an external USB disk with an NTFS filesystem on it. If I remove a file from Windows and I run one of the several "undelete" utilities (say, TestDisk) I can easily recover the file (because "it's still there but it's marked as deleted"). If I remove the file from Linux no utility (unless I use a deep-search signature-based one) can recover the file. Why? How is unlink implemented in Linux's NTFS file system code? It looks like it does not just "mark it as undeleted" but it wipes away some on-disk structure, is this the case?

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• How to integerate Skype in Messaging Menu with Skype-Wrapper?

  - by Tahir Akram

  I cant see skype-wrapper in unity dash (alt f2). So I run it from terminal and attach it with skype. But it only appears in menu, when I run it from terminal like tahir@StoneCode:~$ skype-wrapper Starting skype-wrapper /usr/lib/python2.7/dist-packages/gobject/constants.py:24: Warning: g_boxed_type_register_static: assertion `g_type_from_name (name) == 0' failed import gobject._gobject INFO: Initializing Skype API INFO: Waiting for Skype Process INFO: Attaching skype-wrapper to Skype process INFO: Attached complete When I quit the terminal, skype disappear from messaging menu. So I need to run skype-wrapper instead of skype and need to add it in startup? Or any other work around? I followed this tutorial. Restart also does not help. Thanks.

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• Referencing environment variables *in* /etc/environment?

  - by Stefan Kendall

  I recently discovered /etc/environment, which seems a more standard way to setup simple environment variables than scripts, but I was wondering if there was a way to back-reference environment variables in the /etc/environment file. That is, I have this: JAVA_HOME="/tools/java" GRAILS_HOME="/tools/grails" GROOVY_HOME="/tools/groovy" GRADLE_HOME="/tools/gradle" PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" If I try to add $JAVA_HOME/bin to the PATH definition, however, I get $JAVA_HOME/bin, and not the interpolated variable. To remedy this, I'm creating environment.sh in profile.d to add the /bin entries to the path, but this seems sloppy and disorganized. Is there a way to backreference the environment variables in /etc/environment?

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• Application for taking pretty screenshots (like OS X does)

  - by Oli

  I've been building a website for a guy who uses Mac OS X and occasionally he sends me screenshots of bugs. They come out looking like this: This is fairly typical of Mac screenshots. You get the window decorations, the shadow from the window and a white or transparent background (not the desktop wallpaper -- I've checked). Compare this to an Ubuntu window-shot (Alt+Print screen): It's impossible to keep a straight face and say the Ubuntu one anywhere near as elegant. My question is: Is there an application that can do this in Ubuntu? Edit: Follow up: Is there an application that can do this in one move? Shutter is pretty good but running the plugin for every screenshot is pretty tiresome as it doesn't seem to remember my preference (I want south-shadow and that requires selecting south, then clicking refresh, then save) and it's more clicks than I'd like. Is there a simple way of telling shutter I want south-shadow for all screenshots (except entire desktop and area-selection)?

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• Loss of privileges when enabeling auto log-in to encrypted home folder

  - by reav

  I use Ubuntu 11.10 with Gnome Shell and have an encrypted home folder. I enabled auto log-in through the system settings/users-admin menu, as I expected it didn't work (because of my encrypted home folder/user I suspect). But now I don't have privileges to mount my eksternal hard-drive, and I can no longer disable the auto log-in function, since the un-lock button in users-admin menu is grayed out. It seems like my users privileges has been degraded. Does any one have an solution to how I disable auto log-in and regain my privileges?

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• Google adwords API - credit card safety question

  - by user5650

  Google is asking me to fax credit card xerox in order to activate adwords API in MCC. 1) Are there alternatives to this - is there a 3rd party provider who will give me this service without me sending them the credit card info? 2) How secure is it to send my credit card fax via some online fax service? 3) Do you think they will reject the application if I hide my CVV number in the fax? Any other thoughts appreciated.

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• Flash site loads slowly

  - by bogdanvursu

  I have a simple html page that embeds an swf, that downloads other xml, swf and image files. The total count of the requests reaches about 90. I am aware that it should take a while until the content is available and I am OK with that. All the needed files are hosted by two different providers in the US: flashxml.net/monochrome-demo.html and u1.flashcomponents.net/samples/8751/index.html From two different countries in Europe, the content shows up a lot later (almost twice as later) from flashxml, than flashcomponents. I've done mtr tests and the ping difference is about 40ms and the flashxml server load is below 1. Do you have any other suggestions as to what should I look at?

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• Simple MediaWiki question

  - by Adobe

  I'm thinking about making a mediawiki website. At first I'd like to try it at localhost. I'm running Kubuntu 11.10, so I did: sudo aptitude install apache2 mysql-server php5 php5-mysql php5-cli And I also fetched the latest mediawiki to: /home/boris/Its/sites/mediawiki-1.17.0 Now I'm supposed to open http://localhost/home/boris/Its/sites/mediawiki-1.17.0/index.php But firefox says the page is not found. While http://localhost works. If I get it right - I have to open index.php to install mediawiki. So my question is - what do I do wrong? I'm really sorry for this is might be a very simple question. By the way do I have to make a db beforehand? Is it possible to use mongoDB as a db with mediawiki?

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• Targeting advertising for T-Mobile and Virgin Mobile users

  - by Codek

  We'd like to target our advertising to Virgin Mobile users. However, Virgin Mobile is actually on the T-Mobile network. So when we do a lookup of the IP address it reports T-Mobile. So this gives 2 problems: No way to target Virgin Mobile When we target T-Mobile we accidentally target Virgin Mobile users too. We actually have 2 separate sites for T-Mobile and Virgin Mobile - So is there any way we can make sure we send people to the right site? Also would appreciate it very much if anyone has any suggestions on other places for this discussion, I'm not entirely sure this is "webmaster" talk?

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• Is there a plugin directory software like Firefox Addon or Wordpress Plugin Directory

  - by lulalala

  Nowadays browsers and content management systems all have the plugin/module/addon/theme systems for users to extend at their own will. Developers can also submit plugin to share the plugin with others. The most famous examples are Firefox Addon and Wordpress Plugin Directory. I want to ask that if there is an open source web system specifically designed for this need - to host plugins? Not just one plugin, but all plugins for one software? Ideally it should allow developers to upload the plugin, have a public version for each update, and client software can check if there are any plugin available through the directory's API. As an example, a CMS can have one such directory to host/display theme files. Also is there a better keyword to describe this kind of system?

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• Best stats tool for cross-domain tracking

  - by kidbrax

  We build a webapp that allows users to run the app under their own subdomain. So we run the app under search.domainX.com, search.domainY.com and so on. They each have their own Google Analytics to track individual stats. But we want to know what general traffic for all clients of our app. So we want to know stuff like "among all our clients we had x number of views." What is the best way tool to track that sort of thing. We prefer a snippet based solution similar to Google Analytics if possible.

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• Secure login for a game that is open source

  - by David Park

  I am making a game which i will be open sourcing. Its a simple arcade like game but requires a network connection because it is meant to be played with other people. The thing i am worrying about is how would i be sure that the client is the one that i put out for the end user to play with? Kind of a like of sv_pure for Team Fortress 2. I was thinking of different ways to combat this such as the server requesting the client's version or even it's md5 hash but people with simple java knowledge could just force a method to always return what the server wants.

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• Learning to optimize with Assembly

  - by niktehpui

  I am a second year student of Computer Games Technology. I recently finished my first prototype of my "kind" of own pathfinder (that doesn't use A* instead a geometrical approach/pattern recognition, the pathfinder just needs the knowledge about the terrain that is in his view to make decisions, because I wanted an AI that could actually explore, if the terrain is already known, then it will walk the shortest way easily, because the pathfinder has a memory of nodes). Anyway my question is more general: How do I start optimizing algorithms/loops/for_each/etc. using Assembly, although general tips are welcome. I am specifically looking for good books, because it is really hard to find good books on this topic. There are some small articles out there like this one, but still isn't enough knowledge to optimize an algorithm/game... I hope there is a modern good book out there, that I just couldn't find...

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• Circular Bullet Spread not Even

  - by SoulBeaver

  I'm creating a bullet shooter much in the style of Touhou. Right now I want to have a very simple circular shot being fired from the enemy. See this picture: As you can see, the spacing is very uneven, which isn't very good if you want to survive. The code I'm using is this: private function shoot() : void { const BULLETS_PER_WAVE : int = 72; var interval : Number = BULLETS_PER_WAVE / 360; for (var i : int = 0; i < BULLETS_PER_WAVE; ++i { var xSpeed : Number = GameConstants.BULLET_NORMAL_SPEED_X * Math.sin(i * interval); var ySpeed : Number = GameConstants.BULLET_NORMAL_SPEED_Y * Math.cos(i * interval); BulletFactory.createNormalBullet(bulletColor_, alice_.center, xSpeed, ySpeed); } canShoot_ = false; cooldownTimer_.start(); } I imagine my mistake is in the sin, cos functions, but I'm not entirely sure what's wrong.

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