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• Sometimes new windows don't come to the front when launched

  - by grafthez

  I'm using gnome shell with new ubuntu for few days now and have experienced really annoying behaviour with new windows. Sometimes when I use another window and press e.g. Alt Ctrl T to open new terminal window, I don't get this window being brought to front. Instead I get notification at the bottom that "New terminal window is ready to use". The same is with Pidgin being integrated with gnome shell (via extension). Every time I get new message, window pops up but doesn't show. I need to either Alt Tab it or click the notification. Is there any way to have new windows being always brought to front, and remove those annoying "Window is ready" notifications? UPDATE - gconftool-2 --search-key focus_new_windows (as severin asked): /schemas/apps/metacity/general/focus_new_windows = Schema (type: `string' list_type: '*invalid*' car_type: '*invalid*' cdr_type: '*invalid*' locale: `C') /apps/metacity/general/focus_new_windows = smart

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• pulseaudio: no microphone configuration

  - by mitsch

  Updated Ubuntu to precise from oneiric on a Dell Inspirion Mini 10 (with an Intel HDA-Soundcard). I can't remember having any issues with the microphone. I didn't need it - I tried ekiga the first time in precise. I couldn't hear any sound in the echo test of ekiga, so I switched to the "System Preferences" and looked for the microphone to boost it. Surprisingly, the microphone input was greyed out - I couldn't mute or unmute, i couldn't even move the volume-slider. On the other hand: I could change the microphone-setting on console with alsamixer, so don't worry about that… :) I just wanted to ask, how to get pulseaudio back to the known, comfortable behaviour. Some newbies won't know the trick to use alsamixer… My soundcard (output of lspci): 00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio Controller (rev 02) Greets!

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• GNOME 3.8 stutters / lags

  - by Robin

  I recently installed Fedora 19 beta and noticed unusually laggy behaviour of GNOME Shell (3.8) on the Nouveau driver on a nVidia 9200GS (also with nVidia driver) So I thought this could be related to Fedora so I installed Ubuntu 13.04 which comes with GNOME 3.6. Everything was buttery smooth as it has always been, but once I upgraded GNOME to 3.8, I experience the same laggy performance on Ubuntu as well. I'm talking about the animations, such as the window overview in activities, openSUSE live image with 3.6 = smooth Ubuntu 13.04 live image with 3.6 = smooth Ubuntu 13.04 install with 3.6 = smooth Ubuntu 13.04 install with 3.8 = laggy Fedora live image with 3.8 = laggy Fedora install with 3.8 = laggy Does anyone have a clue what could be going on?

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• Problems after upgrading from 10.04 to 12.04

  - by Paul D

  I upgraded to 12.04.1 from 10.04 recently and am running the Gnome Classic (no effects) desktop. I spent a couple of days tweaking the appearance and behaviour but there are two issues that I can't resolve. The mouse cursor frequently disappears, especially when scrolling through web pages or hovering over links/icons with tooltips. Moving the mouse brings the pointer back but it vanishes again almost immediately. Note I don't have unclutter or Parallels installed. The screen no longer fades to black when left idle for too long - it just cuts out. Bad news when watching content online. Any tips greatly appreciated. Cheers...

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• Unity session goes to lock on app launch, and won't unlock with password

  - by really

  Has been happening on every Ubuntu machine I've used to date, which is a total of 4. Started in 12.10 as far as I know, but it might have happened with 12.04, 12.10, 13.04, 13.10 and now 14.04. It doesn't seem to matter what I'm doing, but what always seems to trigger it is opening a web browser or some other application first from the sidebar. Firefox was was the most recent trigger. Instead of opening my browser, which it acts like it's going to do... the session locks, goes to the login screen, and won't unlock with the correct password. By 'won't unlock' I mean it unlocks then immediately locks again without first restoring unity, it does not produce 'incorrect password' I suspect this is a virus or password snooping software because of the fact it won't unlock with correct password information and I think if this IS a security issue, it should be fixed asap considering it's widespread throughout multiple versions. It's probably not a virus, but it is certainly suspicious behaviour to see your pc do that... wouldn't you think?

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• Ubuntu server 12.04 on AWS - How does the passwordless sudo work for the ubuntu user?

  - by aychedee

  I'm using Ubuntu server 12.04 on Amazon. I want to add a new user that has the same behaviour as the default ubuntu user. Specifically I want passwordless sudo for this new user. So I've added a new user and went to edit /etc/sudoers (using visudo of course). From reading that file it seemed like the default ubuntu user was getting it's passwordless sudo from being a member of the admin group. So I added my new user to that. Which didn't work. Then I tried adding the NOPASSWD directive to sudoers. Which also didn't work. Anyway, now I'm just curious. How does the ubuntu user get passwordless privileges if they aren't defined in /etc/sudoers. What is the mechanism that allows this?

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• Shut down Netbook by closing lid - ubunti 13.10

  - by The Liquidator

  My wife has an Acer Aspire One (with the SSD Card and an SD expansion card). It has never been able to hibernate or suspend, always creating errors and occasionally trashing the data on the SD card, which is the home partition so it's unfortunate. To get around the problem I have set all exit methods to produce shutdown - she tends to simply shut the lid. I'm aware the default behaviour has for some time been to suspend, but I've got round that using the gnome tweak tool. However, I've just installed 13.10 and whilst I have installed the gnome tweak tool and set it to shut down the system appears to be ignoring/bypassing the setting, electing to suspend when the lid is shut. Can anyone tell me how to fix it please? I'm quite happy to get my hands dirty with the command line.

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• How do I turn off the laptop screen while using an external monitor?

  - by jpmelos

  When I close my laptop lid, all my screens are turned off (my laptop screen and my LG M237WA monitor). I'd like to know how do I make it turn off only the laptop screen and keep the monitor on (I want that behaviour for when I want to watch a movie on my monitor and don't want any brightness coming for the laptop screen). I'm using a HP Pavilion dv4-1290br, which comes with a nVidia GeForce 8400M GTS. I'm using the nVidia driver and it's working perfectly. For my X settings, I'm using TwinView, my laptop is set to 1280x800 and my monitor to 1920x1080. I hope you guys can help me, for I couldn't find anything so far. Thank you very much.

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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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• Trouble with Libreoffice 4.0.* in Ubuntu 12.04

  - by isotoper

  I have used Libreoffice Impress to give presentations at meetings for some time now. The current version of Libreoffice in Ubuntu 12.04 is 3.5.7.2 and this works fine for me. Recently, following a recommendation from a colleague, I installed Libreoffice 4.0.something using the Libreoffice PPA. This worked, but I discovered when going into slide show mode most of the graphics (line graphs) disappeared, even though they were perfectly visible in the original. Lettering, drawings, and pictures came over, but not the line graphs (which were originally inserted in .eps format most likely). With some effort I managed to uninstall the more recent version of Libreoffice, and reinstall the version in the Ubuntu repositories (3.5.7.2) and the graphs now appear as expected in the slide show mode. Is there any explanation for this behaviour?

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• What's the difference between a "Release" Xbox 360 build and a "Debug" one?

  - by Sebastian Gray

  I've got a build of my game that works on Windows under a release and debug build as expected. When I deploy the debug version of the game to the Xbox, it works as expected and runs the same as on Windows - however when I deploy the release version to the XBOX I get different behaviour within the game. I'm using a 3rd party library for the collisions (which is where I am seeing differences between the release and debug versions of my game); so I can't see what's actually different but I suspect they have some compiler directive for Debug on the Xbox to the Release version on the Xbox. As such, I'm thinking that I may need to release my game with the Debug build instead of the Release build but I want to know what issues I can expect by doing so? Are there any significant performance issues between the two build profiles?

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• Is this a pattern? Proxy/delegation of interface to existing concrete implementation

  - by Ian Newson

  I occasionally write code like this when I want to replace small parts of an existing implementation: public interface IFoo { void Bar(); } public class Foo : IFoo { public void Bar() { } } public class ProxyFoo : IFoo { private IFoo _Implementation; public ProxyFoo(IFoo implementation) { this._Implementation = implementation; } #region IFoo Members public void Bar() { this._Implementation.Bar(); } #endregion } This is a much smaller example than the real life cases in which I've used this pattern, but if implementing an existing interface or abstract class would require lots of code, most of which is already written, but I need to change a small part of the behaviour, then I will use this pattern. Is this a pattern or an anti pattern? If so, does it have a name and are there any well known pros and cons to this approach? Is there a better way to achieve the same result? Rewriting the interfaces and/or the concrete implementation is not normally an option as it will be provided by a third party library.

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• share folder in server torrent daemon like in DC(Direct Connect )

  - by alex_bubuker

  So my question: is it possible to share on a server torrent daemon/application a whole folder with films? I had expirience with DC(Direct Connect) applications and it worked well. I selected folder and exec command share == other people stared to download files from my computer. In my expirience with torrent application you should first create torrent file and then people can download file from you. So is there any torrent client/plugin for torrent client that DC-like behaviour become possible? If it is possible at all ... Thank you

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• Firefox installed on my ubuntu 12.04 machine but I am unable to connect to the internet(Nobody know???)

  - by Chella

  every other browser installed is working fine..! except this Firefox. what are the things that I need to check, to make firefox work on my computer. I am a newbie for ubuntu. I tried googling not got enough and clear information. Please help me. Thanks in advance..! This is the error that I am getting just before launching of the application..! Could not initialize the application's security component. The most likely cause is problems with files in your application's profile directory. Please check that this directory has no read/write restrictions and your hard disk is not full or close to full. It is recommended that you exit the application and fix the problem. If you continue to use this session, you might see incorrect application behaviour when accessing security features.

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• How do I find the dependencies for a program before trying to compile it?

  - by Ubuntu_beginner

  I was trying to cross-compile a program for ARM. While compiling I was very much irritated as I had to look for a number of dependencies e.g fatal error: abc/xyz.h: No such file or directory compilation terminated. After ensuring that compiler gets the missing files, when I recompiled, I got same error for about 30 files. I have no idea if that is normal behaviour. If it is normal, is there a method which can help the compiler find the dependencies on its own? If that is not normal, then please explain what I'm doing wrong.

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• Why does Evolution give me multiple reminders for the same event?

  - by Dylan McCall

  I have a bunch of calendars on my Google Calendar account (school & work, personal, etc.), so I have Evolution subscribed to each one of those calendars. When I get a notification for an upcoming (recurring) event, I actually get many notifications for the same event, all at the same time. For example, just now I got 21 notifications for one event. I am using Gnome Shell, where the message tray displays event notifications in its own way. I get the same behaviour on my other computer, also running Ubuntu 11.10 with Gnome Shell. (And it has happened running Unity where Evolution only shows its dialog window with event reminders, but I'm not sure if it has happened quite as intensely). Does someone know why this is happening, and maybe how to fix it? It would be cool to get slightly less panic-inducing event reminders :)

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• How can I stop pixel seams appearing in adjacent mesh boundaries due to floating point imprecision?

  - by ufomorace

  Graphics cards are mathematically imprecise. So when some meshes are joined by their borders, the graphics card often makes mistakes and decides that some pixels at the seam represent neither object, and unwanted pixels appear. It's a natural behaviour on all graphics cards. How are such worries avoided in Pro Games? Batching? Shaders? Different tangent vectors? Merging? Overlaping seams? Dark backgrounds? Extra vertices at borders? Z precision? Camera distance tweaks? Screencap of a fix that ended up not working:

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• How do professional games avoid showing pixel seams in adjacent mesh boundaries due to decimal imprecision?

  - by ufomorace

  Graphics cards are mathematically imprecise. So when some meshes are joined by their borders, the graphics card often makes mistakes and decides that some pixels at the seam represent neither object, and unwanted pixels appear. It's a natural behaviour on all graphics cards. How are such worries avoided in Pro Games? Batching? Shaders? Different tangent vectors? Merging? Overlaping seams? Dark backgrounds? Extra vertices at borders? Z precision? Camera distance tweaks? Screencap of a fix that ended up not working:

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• Content Weighting and Sociology

  - by Chris Massey

  I’ve had loads of fantastic feedback on the concept and early curation wireframes I posted on the labs, and it’s led to some further thoughts on the topic of voting. More specifically, thoughts about the kinds of behaviour and values a platform encourages in it’s users via the set of available actions. StackOverflow is a very good example of this kind of sociology in action, not only via the set of available actions, but through the reputation system it uses to both reward and control it’s users. In our case (specifically, in the case of the curation model I’ve been talking about thus far), the main considerations are how the quality of content is judged, and how to make sure each piece of curated content gets a fair hearing. Based on the feedback and conversations I’ve had with many of you over the last few days, a few considerations came to light about how we might need to weight and display our curations, and I’ve written about that more extensively over on the labs themselves – have a read and let me know what you think.

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• How can I make Liferea to open links in the background?

  - by sup

  I have Opera set as my default browser but it is the same for Firefox. When opening a link in Liferea, the link open in an external browser and the browser gets focus. I would like to open the links in background (so that the browser does not get focus). The only solution is to set Focus prevention level to Normal in the Focus & Raise Behaviour tab of General options in CCSM. But this messes things for other things. DO you have any other idea? I am using Unity on 11.10.

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• How do I edit keyboard preferences from the command line?

  - by jumpnett

  I want to swap the Caps Lock and Escape key as specified in this answer: Use the keyboard preferences to swap Caps Lock and Escape - seriously, how often do you use Caps Lock? Using vim you will be using Escape all the time, and having it available on the home row makes a huge difference. With the standard Ubuntu desktop, go through the menus: System - Preferences - Keyboard - Layouts tab. Then hit the "Layout Options" button, click on the triangle next to "Caps Lock key behaviour" and select "Swap ESC and CapsLock". but, I'm using Ubuntu Server with no gui, so how would I do this from the command line?

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• How do I prevent the Sleep button from locking the screen

  - by elmicha

  My keyboard has a Sleep button. I defined a shortcut in System Settings, Keyboard Shortcuts own settings (or similar), so that the Sleep buttons runs a script. That works. But since my upgrade to Oneiric, something also locks the screen (in the same way the screen is locked when I press Ctrl+Alt+L). Can I disable that behaviour? What's the name of that lock screen? I tried hiding gnome-screensaver and /etc/acpi/ and I looked in gconf-editor /apps/gnome-power-manager/buttons. I didn't find anything related in dconf-editor.

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• How do I configure the mouse to raise and lower windows

  - by user288496

  I've just installed 14.04 and cannot find the congfuration screen to control how mouse clicks are acted on by the window manager, and then optionally passed to the application. I want to set the sane traditional unix behaviour of: - 'focus follows mouse': done. - 'never auto-raise': done. - 'raise when click on border or title': Can't find the option. A middle button click on the tile does lower a window - but traditionally it would also raise the botton window. I can set 'raise on any click' - but that is absolutely hopeless when you are trying to copy text from a lower window.

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• Blank lines between sourcecode [closed]

  - by manix

  I'm so confused with a strange behaviour. Actually I have edited some php files remotely with my PhpDesigner8 (a php editor). Everything goes right, but when my teammates reopen the files that I have edited the source code have blank lines like below: class AdminController extends Controller { function __construct() { parent::__construct(); if (!$this->session->can_admin()) { show_error('Solo para administradores.'); } $this->load->library('backend'); } } Instead of class AdminController extends Controller { function __construct() { parent::__construct(); if (!$this->session->can_admin()) { show_error('Solo para administradores.'); } $this->load->library('backend'); } } Did you have experience these kinds of problems?

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• Clicking on application launcher starts another window. What should I do?

  - by MMA

  If I remember correctly, clicking on the application in launcher started the application if it was not already open and focused on the application if it was already open. Previously, I had to middle click to start another instance. But, recently, whenever I click in the launcher, a new application window is started, irrespective of whether one is already open or not. What should I do? A bug? Or a new feature? I am using 12.04 LTS and 12.10 in two machines. Both fully updated. Both are showing the same behaviour.

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