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• 12.04 boots fine, with graphical splash screen, but then Monitor "out of range"

  - by Jim Bednar

  I see dozens of posts from people whose monitors are saying "out of range" under Ubuntu; seems like there are some serious problems in Ubuntu with autodetection of monitor capabilities. :-( But none of the many, many suggestions I found have solved my problem, and right now I can't use anything graphical on this machine! History: I installed Ubuntu 12.04 on my HP Proliant Microserver N40L, which worked reasonably at the default resolution across several reboots. At some point I noticed that the proprietary video driver was not in use, and tried to install one to get better window-drawing speeds, but it failed with some sort of error, and I gave up on that. A few weeks later when I next rebooted, it showed the usual BIOS screen and various boot loading screens (including GRUB), and then the usual purple Ubuntu splash screen with the dots showing that things were loading, but when it finished booting the monitor went black and eventually showed "Out of range" (with no other information). Given that there were several weeks between reboots (it's a server, after all), I've no idea if it was some system update, trying to install the proprietary drivers, or something else that caused the problem. Anyway, the system has booted fine, as I can do Ctrl-Alt-F1 to get a text prompt and can log in there. But Ctrl-Alt-F7 goes back to the out of range error. Some posters said to try Ctrl-Alt-- (minus) to cycle through resolutions until one works, but that didn't have any visible effect. Many, many others said it was a grub problem, which seems unlikely given that grub's screen looks fine, but I tried editing /etc/default/grub to set a particular resolution (trying many of them) and running update-grub, with no apparent effect. Rebooting into failsafe mode works the same as regular mode. Replacing xorg.conf with xorg.conf.failsafe works the same too. I'm at my wits' end! Isn't there anything I can do to convince Ubuntu to choose a mode that the monitor supports? E.g. the one that it is using for the splash screen? I don't need great resolution on this machine, just anything that works!!!!! Help!!!!!! Please!!!!

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• Is Grub installed when Ubuntu is the only OS installed?

  - by Dennis

  I have a simple question concerning Grub. When Ubuntu it's the only system installed on a machine, Grub doesn't appear when the computer it's turned on, my question is: When Ubuntu is the only system, Grub it's not installed on MBR? I has this doubt when I tried the ASPM command in Grub, to see if it could save some battery on my notebook, and the difference was only 0.4W. I don't even know if it made some effect or it's just a normal oscilation. Thanks.

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• DX9 Deferred Rendering, GBuffer displays as clear color only

  - by Fire31

  I'm trying to implement Catalin Zima's Deferred Renderer in a very lightweight c++ DirectX 9 app (only renders a skydome and a model), at this moment I'm trying to render the gbuffer, but I'm having a problem, the screen shows only the clear color, no matter how much I move the camera around. However, removing all the render target operations lets the app render the scene normally, even if the models are being applied the renderGBuffer effect. Any ideas of what I'm doing wrong?

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• What different ways are there to model restitution in a physics engine?

  - by Mikael Högström

  In my physics engine I give a body a value for restitution between 0 and 1. When two bodies collide there seems to be different views on how the restitution of the collision should be calculated. To me the most intuitive seems to be to take the average of the two but some seem to take only the largest one. Are there other ways to do it? Also, could the closing velocity or some other parameter come into effect?

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• Keywords As SEM Tools and the Need of Search Engine Optimization

  SEO the most trusted system to get on top of page ranking is the most essential thing for any website. But it is to be kept in mind that the effect that proper SEO can achieve cannot be matched with any other means of increasing page ranking. One of the most effective tools for SEM is the keywords.

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• Wp-count Malware Injection [closed]

  - by Amar Ryder

  I received a malware notification from Google Webmaster tools yesterday for my blog which is running on Wordpress. After going through website I found that there is a file called wp-count.php creating malware code. I tried to delete that but it reappears again and again so I have erased coding inside. Now its there without coding but still I think it may be any other codes which are effect my website. How can I fix it?

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• How to get warnings when compiling fx files

  - by jdv-Jan de Vaan

  When I compile DirectX shaders (.fx files), I dont see any compiler warnings unless there was an error in the effect. This happens both when using the offline FXC compiler, as well as calling SlimDx's CompileEffect (which is what we normally do). I could force warnings as errors (/WX), but if you enable that, you get an error that compilation failed, without the warning that caused the problem. So how can I output warnings for shaders that compile properly?

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• Crystal Reports: 3 New Uses For Sub Reports

  I hate sub reports and always consider them the last resort in any reporting solution. The negative effect on performance and maintainability is just not worth the easy ride they give the report writer. Nine times out of ten reporting requirements can be met using a little forethought and planning (and a solid understanding of formulas). With that said, there are a few novel ways of using sub reports which will not affect performance and actually prove a boon to the developer.

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• 2D Animation Smoothness - Delta time vs. Kinematics

  - by viperld002

  I'm animating a sprite in 2D with key frames of rotation and xy-positions. I've recently had a discussion with someone saying that when the device (happens to be an iPad using cocos2D) hits a performance bump due to whatever else the user may be doing, lag will arise and that the best way to fight it is to not use actual positions, but velocities, accelerations and torques with kinematics. His message is to evaluate the positions and rotations from these speeds at the current point in time. I've never experienced a situation where I've heard of using kinematics to stem lag in 2D animations and am not sure of how effective it could be. Also, it seems to be overkill. The application is not networked so it's all running on a local device. The desired effect is that the animation always plays as closely as it can to the target frame rate. Wouldn't the technique suffer the same problems as just using the time since the last frame or a fixed time step since the kinematics would also require some time value to perform the calculation? What techniques could you suggest to best achieve the desired effect? EDIT 1 Thank you for your responses, they are very illuminating. I want to clarify my question before choosing an answer however, to make sure that this post really serves it's purpose. I have a sprite of a ball, and a text file with 3 arrays worth of information (rotation,translations x, translations y) with each unit of information existing as a key frame to be stepped through (0 to 49 and back to 0 to replay it again). I have this playing by interpolating from the current key frame to the next, every n-units of time. The animation is visibly correct when compared to a video I was given of it, and it is smooth because of the interpolations between the key frames. This is the existing state of the project. There are no physics simulated, only a static animation of a ball moving in a way an artist specifically designed. Should I, instead of rotation in degrees and translations by positions in space, derive velocities, accelerations and torques to express this static animation as a function of time? As in, position now = foo(time now), where foo uses kinematics.

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• Messaging indicator does not obey applications-blacklist

  - by user74517

  Since upgrading from 11.10 to 12.04, the microblogging and instant messaging entries have reappeared in the messaging menu. I put symlinks in ~/.config/indicators/messages/applications-blacklist to deactivate empathy evolution gwibber.indicator ubuntuone-control-panel, but this does not seem to have any effect now. How can I remove these entries? I would like to remove the status entries as well, and keep only Thunderbird information.

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• Where can I find a legal "permission to work on open source" document?

  - by Nathan Long

  One of the things I really like about my current job is that we developers are encouraged to make open source contributions. However, this encouragement has always been verbal. I've read some horror stories about developers having their open-source work legally claimed by their employer. I'd be more comfortable if we had something in writing from my employer saying that contributions are allowed and not owned by the company. Understanding that you are not lawyers, does anyone know where to find a boilerplate document to this effect?

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• How do I turn off the onscreen keyboard on the lock screen?

  - by Patrick Marchwiak

  The lock screen has an on screen keyboard that I am unable to disable. I don't remember exactly but I believe I turned it on using the "Screen Keyboard" setting in the Universal Access settings. I've tried a number of things all with no effect: Toggling "Screen Keyboard" in Universal Access Toggling "Onscreen keyboard" in the login screen (LightDM) Clicking on the "x" in the upper right corner of the keyboard

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• SEO for replacing blog content, but keeping the same page URL

  - by cphill

  This might not have any major impact on the SEO, but basically I have random blog at this URL: http://example.com/blog (not a real URL), that I am removing and replacing with a company blog. I want to use the http://example.com/blog URL address, but I'm not sure how this would effect my SEO since this random blog content that I am removing has the example.com/blog URL prefix. Would I just add a 310 redirect for those old blog articles and leave the basic /blog URL without any redirects?

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• Color scheme for programmers

  - by seler

  Recently I've discovered Solarized. It's supposed to reduce eye-fatigue and after using it for a while i must say it's true. When I switched back to my old colors they were damn to bright. I don't really like the colors in Solarized theme but I'm astonished by the effect it has on my eyes. I'm wondering if there are other themes designed with such a precision for wide range of IDEs (and even terminal colors!). Another example is Zenburn

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• emacs keybindings in ubuntu 12.04

  - by sam

  I am trying to get emacs-like keybindings in gtk, firefox, chrome, etc. I have followed the directions recommended here (and in lots of places) but to no effect: http://kb.mozillazine.org/Emacs_Keybindings_(Firefox) In other words, I added 'gtk-key-theme-name = "Emacs"' to my .gtkrc-2.0, and I also ran gconf-editor and set "/desktop/gnome/interface/gtk_key_theme" to "Emacs". I even rebooted just for good measure. I am using an ordinary Ubuntu 12.04 install, with unity3d as the desktop environment. Thanks! Sam

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• Generating triangles from a square grid

  - by vivi

  I have a 2D square grid of values representing terrain elevations, and I want to generate triangles from that grid to make a 3D view of the terrain. My first thought was to split each square diagonally into 2 triangles, however the split diagonal can clearly be seen, especially from the top : [Sorry, as a new user I can't post images, please see here : imgur] Is there a recommended way to generate triangles to remove/reduce this effect ?

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• Website Benchmarking - How Does Your Website Compare?

  With over 14 billion websites, the internet is fast becoming the first place people look for information. As the number of websites swells it becomes increasingly difficult to set your own website apart from the rest. Being able to quantify the friendliness of your website is essential if you want to know what changes can be made for the better and how you can expect those changes to effect traffic and ranking.

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• Why can't a blendShader sample anything but the current coordinate of the background image?

  - by Triynko

  In Flash, you can set a DisplayObject's blendShader property to a pixel shader (flash.shaders.Shader class). The mechanism is nice, because Flash automatically provides your Shader with two input images, including the background surface and the foreground display object's bitmap. The problem is that at runtime, the shader doesn't allow you to sample the background anywhere but under the current output coordinate. If you try to sample other coordinates, it just returns the color of the current coordinate instead, ignoring the coordinates you specified. This seems to occur only at runtime, because it works properly in the Pixel Bender toolkit. This limitation makes it impossible to simulate, for example, the Aero Glass effect in Windows Vista/7, because you cannot sample the background properly for blurring. I must mention that it is possible to create the effect in Flash through manual composition techniques, but it's hard to determine when it actually needs updated, because Flash does not provide information about when a particular area of the screen or a particular display object needs re-rendered. For example, you may have a fixed glass surface with objects moving underneath it that don't dispatch events when they move. The only alternative is to re-render the glass bar every frame, which is inefficient, which is why I am trying to do it through a blendShader so Flash determines when it needs rendered automatically. Is there a technical reason for this limitation, or is it an oversight of some sort? Does anyone know of a workaround, or a way I could provide my manual composition implementation with information about when it needs re-rendered? The limitation is mentioned with no explanation in the last note in this page: http://help.adobe.com/en_US/as3/dev/WSB19E965E-CCD2-4174-8077-8E5D0141A4A8.html It says: "Note: When a Pixel Bender shader program is run as a blend in Flash Player or AIR, the sampling and outCoord() functions behave differently than in other contexts.In a blend, a sampling function will always return the current pixel being evaluated by the shader. You cannot, for example, use add an offset to outCoord() in order to sample a neighboring pixel. Likewise, if you use the outCoord() function outside a sampling function, its coordinates always evaluate to 0. You cannot, for example, use the position of a pixel to influence how the blended images are combined."

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• Why does Inkscape become unresponsive all of the sudden and how can I stop it from happening?

  - by klenwell

  I've just started using Inkscape in Ubuntu 11.10 and I'm not sure what exactly triggers it, but at some point, the Inkscape viewport becomes unresponsive. The viewport is still visible. I can still manipulate the window itself: move, resize, open menu items at top. The cursor switches style. But clicking on anything within the viewport has no effect. I must close the file and restart in order to regain control.

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• Analysing Indexes - reducing scans.

  - by GrumpyOldDBA

  The whole subject of database/application tuning is sometimes akin to a black art, it's pretty easy to find your worst 20 whatever but actually seeking to reduce operational overhead can be slightly more tricky. If you ever read through my analysing indexes post you'll know I have a number of ways of seeking out ways to tune the database. -- This is a slightly different slant on one of those which produced an interesting side effect. -- We all know that except for very small tables avoiding...(read more)

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• Is there a way to prevent users from adjusting their gamma correction to 'cheat' their way out of a 'dark' area?

  - by Athix

  In almost every game I've come across that includes a dark situation designed to change the way a user interacts with the environment, there are always some players who turn up their monitor's gamma correction in order to negate the desired effect. Is there a way to prevent users from adjusting their gamma correction to 'cheat' their way out of a challenge? (the darkness) I'd imagine if you could reliably retrieve the current gamma correction of the user's monitor, you could use that to more or less prevent the advantage it would otherwise grant without causing the normal users any inconvenience.

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• Compiz crashes after login

  - by T.Kijas

  after I log-in into Unity, compiz effects are disabled and it says compiz crashes. Restart of them usually works, but not every time. After restart of compiz, compiz works without problems, every effect is OK. I tried latest NVIDIA drivers from xorg-edgers, but situation is the same. I tried to delete folder with compiz settings, but it hasn't helped. I use two LCDs, but with only one enabled, the situation is the same. Thank you for suggestions.

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• H1 vs H2 vs Other for website title/logo and SEO

  - by Ilian Iliev

  It is a common practice for front-end developers to put the website title or logo in H1 tag and the title in H2. But most of the time the title of the page/article is more important because it caries the content value. So my question is what is the best approac from semantic and seo viewpoint. Examples: logo - H1, title - H1 logo - H1, title - H2 logo - H2, title - H1 logo - other tag, title - H1 Provided other variants if you think they will have bigger effect.

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• Same sitemap submitted for .com and .co.uk domain

  - by Dean

  Not to sure why I did this. But I submitted the same sitemap for our .co.uk and .com domain. Looking to put the .com domain on different hosting and create a new site for international customers using .com domain. Should I remove all urls in google webmasters for the .com domain, guessing this won't have a negative effect on .co.uk stuff and add robot.txt to make sure the .com domain is not crawled? Thanks

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• Opening / using WUBI after downloading

  - by Jon

  I have no problem downloading WUBI either using Firefox or IE. Either way, however, when I try to run or open it, I get a message to the effect that the file cannot run because the configuration is incorrect and "re-installing the file may help" (which it doesn't - I've tried several times). What am doing wrong ? I am running XP Pro. (Note: my Ubuntu CD works just fine but I want to install Ubuntu inside Windows).

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