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• Why is Firefox changing the color calibration of this image?

  - by eoinoc

  The symptom of my problem is that the same hex color in a PNG image does not match the CSS-defined color defined by the same hex code. This problem only happens in Firefox when gfx.color_management.mode is set to 2 (tagged images only) rather than 0 (off). (Firefox ICC color correction described here). The image is http://dzfk93w6juz0e.cloudfront.net/images/background-top-light.png which at the bottom has the color #c8e8bd. However, the shade of green is different to that color when Firefox color calibration is enabled. Is this image inadvertently "tagged" for color correction?

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• Ubuntu live cd : black screen and blinking cursor

  - by IFasel

  I try to install ubuntu 12.04 on my computer. I can get to the purple screen on the live cd but then, if I choose "Installing Ubuntu", I have a black screen with a cursor blinking (and nothing else happens). My PC : acer aspire M3920, CPU i5-2300, 8 Gb RAM, NVIDIA gt 405. What I already tried : I tried with 12.04 and 13.04 daily build I tried with a live usb and with a live dvd I tried the following boot options : nomodset, acpi=off I googled a lot and it seems that it could be a graphic card problem. Do you know any other boot options that I could try ? UPDATE This is not a duplicate : I've tried all the common boot options (nomodeset, noacpi...) and it doesn't change anything. With the option "no splash" (instead of "quiet splash"), I can see what happens before the forever-blinking cursor : [sdg] no caching mode present [sdg] assuming drive cache : write trough ata8.00: excetion Emask 0x52 ... frozen ata8 : SError : { RecovData RecovComm UnrecovData...} ata8.00 : failed command : IDENTIFY PACKET DEVICE ... ata8.00 : status : { DRDY } ata8 : hard resetting link Does somebody know what it means ? N.B. astonishingly, Puppy Linux boots fine (but Debian, Fedora and Ubuntu do not) Solution In fact, it was not a graphic card problem. I had to disconnect the dvd drive and connect it to another free sata connector (I don't really understand why Ubuntu had trouble with this connector and Windows 7 not). After that, everything worked fine.

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• Ubuntu 12.04 - NVIDIA GT 525M Error

  - by talha06

  I removed all packages associated with NVIDIA from Synaptic Package Manager and installed nvidia-current. When I click NVIDIA-Settings, gives an error like this: You do not appear to be using the NVIDIA X driver. Please edit your X configuration file (just run `nvidia-xconfig` as root), and restart the X server. Please help me, I need your helps. My laptop model is Dell Inspiron N5110 using Nvidia GeForce GT525M..

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• What's wrong with this OpenGL model picking code?

  - by openglNewbie

  I am making simple model viewer using OpenGL. When I want to pick an object OpenGL returns nothing or an object that is in another place. This is my code: GLuint buff[1024] = {0}; GLint hits,view[4]; glSelectBuffer(1024,buff); glGetIntegerv(GL_VIEWPORT, view); glMatrixMode(GL_PROJECTION); glPushMatrix(); glLoadIdentity(); gluPickMatrix(x,y,1.0,1.0,view); gluPerspective(45,(float)view[2]/(float)view[4],1.0,1500.0); glMatrixMode(GL_MODELVIEW); glRenderMode(GL_SELECT); glLoadIdentity(); //I make the same transformations for normal render glTranslatef(0, 0, -zoom); glMultMatrixf(transform.M); glInitNames(); glPushName(-1); for(int j=0;j<allNodes.size();j++) { glLoadName(allNodes.at(j)->id); allNodes.at(j)->Draw(textures); } glPopName(); glMatrixMode(GL_PROJECTION); glPopMatrix(); hits = glRenderMode(GL_RENDER);

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• How to program a cutting tool for 3D model in game

  - by Jesse S

  I'm looking for a resource to figure out how to program a function to cut a 3d model in game. Example: Enemy/NPC is sliced into 2 pieces with a sword. His body is not hollow, you can see bloody texture where normally a 'polygon hole' would be. The first step is to actually 'cut/slice' the model, then add in polygons to fill the hole in the model. I know this can be done in 3D modelling software, but I'm not sure how to go about doing this in a game, code-wise. I do not wish to use 'pre cut-up" models, the code will determine where the cut is. Any pointers in the right direction would be greatly appreciated.

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• my mouse blinks!

  - by Jeffrey

  hello I'm new in linux systems and I have the same problem in every distro... the thing is that my mouse every time i move it or do anything with it blinks!!! I think it's a xorg problem or a driver problem and the only way it does not do that is when i start with the low-resolution error using a xorg.conf from another graphic chipset and i think that isn't the best choise xDD please if you can help me I have a ati rage 128, thanks a lot for your help people n.n

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• Cannot boot from K/Ubuntu install disk on my UEFI system

  - by user93241

  I just got a new system and have been trying to get it set up w/ Win7 & Kubuntu dual-boot, but I've got a major problem. The BIOS of my motherboard (an Asus Crosshair 990FX) is strictly UEFI -- there is no legacy support mode available. I've been reading up on how to get Kubuntu installed in UEFI mode but no matter what I try I cannot seem to even boot into my install CD/USB key properly. I can get as far as the selection screen ("Try Kubuntu", "Install Kubuntu"...) but this screen starts off not appearing correctly. If I try moving the cursor around it sometimes seems to correct itself and show me my choices. But once I select "Try Kubuntu" it starts loading, the screen goes black and then proceeds to flicker -- about once every 5-10 seconds or so. This continues indefinitely. I've tried this with both Kubuntu & Ubuntu installation media, even the AMD64+Mac Ubuntu variety that is supposed to be a lot more flexible w.r.t. UEFI. The only hint I've had that the system might have booted correctly is a little drum sound that plays when booting from the Ubuntu install disk. Well, that and the fact that when I hit my system's power button it seems to shut down correctly, even ejecting the CD at the end. This might be a video driver issue; my system has two nVidia 550's, one of which is attached to my primary monitor. (The secondary isn't hooked up yet.) I'll keep looking over similar questions but any advice would be greatly appreciated. UPDATE: I've tried booting into my 12.04 install CD twice now, each time using two different options supplied by my BIOS. One seemed to offer the ability to boot into my CD under UEFI mode -- this didn't even produce the initial boot menu. The other method offers the ability to boot into my CD NOT under UEFI mode. This DOES produce the boot menu, but after this point it seems I still cannot get to a proper video mode to see what's going on.

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• Trouble with FGLRX in quantal x86_64

  - by Dii Leoo

  it's the third time i have to reinstall quantal because the fglrx is making me sick. I have an ATI Mobility Radeon HD 4250 (the code ir RS880).When i install Ati Driver, i don't have any problems, but when i reboot, the resolution is minimal and the launcher isn't visible, i can only use the things that are in desktop and use the terminal using CTRL+ALT+T. i've tried to make specific distribution page, downloading the legacy driver from AMD, and another thing: when i had 12.04 jockey told me that i could install some drivers, i had trouble, but that doesn't matter. now, the option to install drivers doesn't tell me about any drivers, i mean, its blank. At the moment i'm using the free drivers (Gallium 0.4 on AMD RS880M. is there any alternative ? or i'll have to live with the free drivers ? Thanks a lot ! I KNOW I HAVE TO INSTALL LEGACY DRIVERS, I'VE INSTALLED THEM, THEY DON'T WORK.

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• Why doesn't my Nvidia driver support 1280*1024?

  - by Alvar

  EDIT: I think the problem is in the NVIDIA x server, that doesn't support an RGB screen from 1990. The screen was the best of them all when it was released. This a strange thing! In windows the EDID must work because 1280*1024 is used as max resolution, but in ubuntu those stuff aren't being received, so how do I tell ubuntu/nivida to find those EDID stuff? Hi, I have an external monitor which is an 20" 1280*1024. In windows 7 it works fine with that resolution but in ubuntu it can't. The screens model name is IntelliColor Display/20 and the name of the company is "radius".recived Well, twin view is working but the only maximum resolution is 1024*768. I'm using nividas x server program. If I force it to use 1280*1024 it all crashes and I have to force a reboot. alvar@alvars-laptop:~$ disper -l display DFP-0: HSD121PHW1 resolutions: 320x175, 320x200, 360x200, 320x240, 400x300, 416x312, 512x384, 640x350, 576x432, 640x400, 680x384, 720x400, 640x480, 720x450, 640x512, 700x525, 800x512, 840x525, 800x600, 960x540, 832x624, 1024x768, 1366x768 display CRT-0: CRT-0 resolutions: 320x240, 400x300, 512x384, 680x384, 640x480, 800x600, 1024x768, 1152x864, 1360x768

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• How do I adjust the resolution on an Intel gma x3100?

  - by Salinski

  I'm with fresh install of 12.04, having gma x3100 as a video card. The problem is I own 19" monitor with native resolution of 1280x1024 but can't force screen resolution on more then 1024x768 ~$ xrandr Screen 0: minimum 320 x 200, current 1024 x 768, maximum 4096 x 4096 VGA1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm 1024x768 60.0* 800x600 60.3 56.2 848x480 60.0 640x480 59.9 I been digging up some info for the past 2 days, yet haven't found any solution. Even tried using gdm instead of lightdm. Any help is appreciated.

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• Bitmap rotation jitter around pivot

  - by Manderin87

  I am working on a asteriods clone and I have the ship graphic loaded as a 96x96 bitmap. When the player rotates the ship I rotate the bitmap by degree (float). rotation function: if(m_Matrix == null) { m_Matrix = new Matrix(); } else { m_Matrix.reset(); } m_Matrix.setRotate(degree, m_BaseImage.getWidth() / 2, m_BaseImage.getHeight() / 2); m_RotatedImage = Bitmap.createBitmap(m_BaseImage, 0, 0, m_BaseImage.getWidth(), m_BaseImage.getHeight(), m_Matrix, true); draw function: m_Paint.setAntiAlias(true); m_Paint.setFilterBitmap(true); m_Paint.setDither(true); canvas.drawBitmap(m_RotatedImage, (int) posX - m_RotatedImage.getWidth() / 2, (int) posY - m_RotatedImage.getHeight() / 2, m_Paint); When the bitmap is drawn, the bitmap jitters slightly around the pivot. Can anyone fix or tell me why the bitmap is jittering around the pivot? It needs to be smooth.

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• Pre-rendered fire. Where to find? [on hold]

  - by Vladivarius

  I'm studying game programming. I haven't yet implemented generated fire rendering in my ,,engine'' so I'm looking for some pre-rendered fire textures for early demo-scenes, but they seems strangely difficult to find. I'm currently using some that I ripped from DMC but I want to try out different ones. Does anyone know where to find these? Software that could generate them would also be ok. Thanks :)

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• How do you load in a .bmp file to use it as a height map in C++?

  - by user1324894

  I need to create a terrain that can be used in C++ and opengl and I am told that using a height map is the way to go. I have a .bmp file that is a greyscale image that I would like to use. However, I do not know how to load that greyscale image into the project so that it can be used as a height map or how I can apply a texture to it to create terrain nor how to compute the normals that I'm told will be required. How would I go about achieving what I would like to do?

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• How far can you get in iOS without learning PhotoShop or another graphic design program? [on hold]

  - by Aerovistae

  I'm in the process of learning iOS, and I'm coming from a web dev background where CSS controls 70-90% of the UI, and Python/C++ desktop dev where there are highly customizable UI toolkits for most things. I'm trying to figure out how people make good-looking apps without graphic design skills. You always hear about some 8 year old or 14 year old who made a successful app. So I assume that even if the required code was relatively basic, the app must have looked good if it was a success. But I find it really unlikely that these kids have advanced PhotoShop skills as well as having learned iOS programming at such a young age. Frankly, the same goes for most independent app developers....as they say, unicorns don't exist. So what's the deal? Can you make a good-looking, market quality app without those skills? What are the limitations?

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• Triple monitors on hybrid video system GeForce+Intel

  - by v_mil

  I use Lenovo Ideapad Z580A with hybrid video: GeForce+Intel with Ubuntu 12.10 x64 Ukrainian. It has internal display and two outputs: HDMI and VGA. When I connect third display to VGA all displays go black. Pressing alt+backspace and login causes output to two displays: internal and VGA. System Settings - Displays (or monitors - I have Ukrainian interface) shows three displays: two are on, one (DVI) is off. Turning DVI on and pressing apply causes an error: Can not set configuration of controller CRTC 65. BIOS setting is Optimus (two video cards). Driver for GeForce is Nouveau. With best regards. Viktor.

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• Will 3D games run in a VirtualBox4-hosted Windows system under Ubuntu with Intel GMA X4500HD card?

  - by Ivan

  I've just got a laptop with Intel GMA X4500HD card (which is said to be DirectX10-compliant, while my previous laptop had Intel 82852/855GM and no chance to play modern 3D games at all). It would be nice if I could play some games (like HalfLife 2, StarCraft 2, Fallout 3) from time to time (while I am ok using lo-fi settings and having low performance) but as I strongly prefer Ubuntu environment and don't need Windows usually I'd like to install Windows inside VirtualBox instead of using a dedicated partition and dual-boot. So the question is if VirtualBox can use 3D acceleration of Intel GMA X4500HD if run on Ubuntu.

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• Unity 3D Display Lag

  - by ec2011

  I find that there is quite a lot of lag when using Unity after upgrading to Precise. It seems that when I first start up the computer, everything is fine, but then if I put the computer on standy for a while and then come back to it, the display is extremely slow and there is a significant delay to visual effects that make the system rather cumbersome to use. I tried to report this as a bug but then bug reporting tool directed me to ask this is a question here first. Thanks for any ideas

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• How can you easily determine the textureRect for tiled maps in SFML 2.0?

  - by ThePlan

  I'm working on creating a 2d map prototype, and I've come across the rendering bit of it. I have a tilesheet with tiles, each tile is 30x30 pixels, and there's a 1px border to delimitate them. In SFML the usual method of drawing a part of a tilesheet is declaring an IntRect with the rectangle coordinates then calling the setTextureRectangle() method to a sprite. In a small game it would work, but I have well over 45 tiles and adding more every day, I can't declare 45 intRects for every material, the map is not optimized yet, it would get even worse if I would have to call the setTextureRect() method, aside from declaring 45 rectangleInts. How could I simplify this task? All I need is a very simple and flexible solution for extracting a region of the tilesheet. Basically I have a Tile class. I create multiple instances of tiles (vectors) and each tile has a position and a material. I parse a map file and as I parse it I set the materials of the map according to the parsed map file, and all I need to do is render. Basically I need to do something like this: switch(tile.getMaterial()) { case GRASS: material_sprite.setTextureRect(something); window.draw(material_sprite); break; case WATER: material_sprite.setTextureRect(something); window.draw(material_sprite); break; // handle more cases }

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• No screens found error with glasen/intel-driver

  - by pgcudahy

  A lot of people seem to have had success in getting hardware acceleration for intel 82852/855GM chipsets with the ppa:glasen/intel-driver. I've tried it on my Motion Computing M1400 but get a "no screens found" error. I've found one person out there with a similar problem who seemed to fix it, but his solution is in German and seems to involve recompiling the kernel (it's at the bottom of the comments). Anyone able to see how to fix this without such drastic measures?

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• What Shading/Rendering techniques are being used in this image?

  - by Rhakiras

  My previous question wasn't clear enough. From a rendering point of view what kind of techniques are used in this image as I would like to apply a similar style (I'm using OpenGL if that matters): http://alexcpeterson.com/ My specific questions are: How is that sun glare made? How does the planet look "cartoon" like? How does the space around the planet look warped/misted? How does the water look that good? I'm a beginner so any information/keywords on each question would be helpful so I can go off and learn more. Thanks

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• Help my graphists sharing their work

  - by Andy M

  As a developer I'm used to Subversion for source control and I think it's great for sharing source code between developers. Now thinking about my graphists and game designers, they need to have a slightly different approach I think. They need to share binary files They need to be able to have a thumbnail and preview of their work I don't want to include their binaries into my game repository (would be much too heavy for developer when updating) I've seen that some graphists uses personally created website to share their work but I was wondering if some "standard" application existed in order to provide my graphists a cool way of working together. Is there a common way of dealing with this? Is the way I want to do (only final sprites on my game repo) correct? How do you guys do this as game developers?

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• Why is text on my TV monitor all grainy?

  - by searchfgold6789

  I have successfully installed the Catalyst drivers and hooked up my 1080p TV to the Radeon HD 5750's HDMI port and now it is working. There only seems to be one issue - most images appear OK, at least to my eyes, but text is grainy and difficult to read (not sure how well it can be seen in the picture): It works fine with a smaller screen, and hopefully you can see it with the new pictures which are only slightly better, but images are rendered a little funny too. Changing antialiasing does nothing and changing the refresh rate only makes a slight change if any. The small monitor I have works fine. Smaller resolutions such as 1024x768 look OK but are the wrong aspect ratio. I have tried renaming the input mode on the TV to "PC", and that helped... a little bit. Also, I tried a different PC with the same result. Messing around extensively with the ATI Catalyst Control Center also did not help. I am wondering if there is anything else I can try to increase the quality so it is more usable.

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• Problem with ubuntu 12.04

  - by Luc1Hz

  It's first time when i use ubuntu.I downloaded and installed 12.04 version of ubuntu.It works fine but sometimes when i shut my pc down from ubuntu and i try to start it again,nothing shows on the screen.It's always black and it shoud appear Acer logo(i have acer aspire 5573)It's like the sistem is restart again and again but it can't boot ubuntu(or windows,i use dualboot)The meniu(where i can choose between windows and ubuntu it's not displayed because the pc don't start correctly.When this happens i shut down the pc definitively and i remove the battery and i put it again.Then everything works fine.How do i repair it?I think that could be a incompatibility with the pc because with windows everything works fine.Help please and sorry for my horrible english...Thanks!

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• Blank Screen on 12.04

  - by stupidwhiteguy

  Can hit Ctrl-Alt-F1 and login but no fixes work. Tried nomodeset and everything else appears to have upgraded but can't see anything. I really need this computer to work. It is an old Dell with 1.6 processor with old school monitor. I don't know why people are giving my question negative votes. If you know how to fix this, then please help me, as I have read and tried all the solutions that I've found. Just for the record reformatting is not fixing it, and I can't get a boot CD to load either. If you know how to use the blank screen fix tutorial, please explain cos I'm lost. Most people don't understand this stuff and an easy "how-to" fix would be nice.

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• Ubuntu on low powered laptop

  - by zkent

  First off, I am new to Ubuntu. I come from a Windows background (DOS before that) and am loving it so far. I installed it on an older Dell laptop that I wanted to get another year out of. I set this machine up primarily as a LAMP development machine for a project I am working on. The machine is a Vostro 1500 and it has 4GB RAM (maxed) and an upgraded hard drive. I can't watch YouTube videos for long before it starts to overheat and start acting sporadic. I can live without YouTube but every so often the application switching (alt-tab) gets slower and begins not showing all applications and the Dash home quits displaying properly. I am sure I am asking a lot of this old machine. What I really want to know is: are there any settings in Ubuntu that allow me to lower the graphic effects (fade-ins, transparencies, fancy transitions, etc) that would be less taxing on the video card?

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