OK, so I'm helping a kid to re-install Minecraft on his laptop. He doesnt have any mods, any resource packs or anything else. Whenever I try to launch Minecraft it shows this:   ---- Minecraft Crash Report ---- // I let you down. Sorry :(  Time: 2/26/15 12:22 PM Description: Initializing game  org.lwjgl.LWJGLException: Pixel format not accelerated     at org.lwjgl.opengl.WindowsPeerInfo.nChoosePixelFormat(Native Method)     at org.lwjgl.opengl.WindowsPeerInfo.choosePixelFormat(WindowsPeerInfo.java:52)     at org.lwjgl.opengl.WindowsDisplay.createWindow(WindowsDisplay.java:247)     at org.lwjgl.opengl.Display.createWindow(Display.java:306)     at org.lwjgl.opengl.Display.create(Display.java:848)     at org.lwjgl.opengl.Display.create(Display.java:757)     at org.lwjgl.opengl.Display.create(Display.java:739)     at avf.ap(SourceFile:534)     at avf.am(SourceFile:363)     at avf.a(SourceFile:310)     at net.minecraft.client.main.Main.main(SourceFile:124)   A detailed walkthrough of the error, its code path and all known details is as follows: ---------------------------------------------------------------------------------------  -- Head -- Stacktrace:     at org.lwjgl.opengl.WindowsPeerInfo.nChoosePixelFormat(Native Method)     at org.lwjgl.opengl.WindowsPeerInfo.choosePixelFormat(WindowsPeerInfo.java:52)     at org.lwjgl.opengl.WindowsDisplay.createWindow(WindowsDisplay.java:247)     at org.lwjgl.opengl.Display.createWindow(Display.java:306)     at org.lwjgl.opengl.Display.create(Display.java:848)     at org.lwjgl.opengl.Display.create(Display.java:757)     at org.lwjgl.opengl.Display.create(Display.java:739)     at avf.ap(SourceFile:534)     at avf.am(SourceFile:363)  -- Initialization -- Details: Stacktrace:     at avf.a(SourceFile:310)     at net.minecraft.client.main.Main.main(SourceFile:124)  -- System Details -- Details:     Minecraft Version: 1.8.3     Operating System: Windows 7 (amd64) version 6.1     CPU: 2x Intel(R) Core(TM)2 Duo CPU P7350 @ 2.00GHz     Java Version: 1.8.0_25, Oracle Corporation     Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation     Memory: 60847904 bytes (58 MB) / 160829440 bytes (153 MB) up to 1060372480 bytes (1011 MB)     JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M     IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0     Launched Version: 1.8.3     LWJGL: 2.9.4     OpenGL: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.     GL Caps:      Using VBOs: No     Is Modded: Probably not. Jar signature remains and client brand is untouched.     Type: Client (map_client.txt)     Resource Packs: []     Current Language: ~~ERROR~~ NullPointerException: null     Profiler Position: N/A (disabled)   Is this normal? Pls help me. The kid will be here the next day!
967
Similar to  on the bugs in Minecraft, I would like a complete list of what error codes exist in Minecraft and how they occur, as well as how they can be resolved.
44412
I'm making a Parkour Map and I need to know how to execute /execute @a ~ ~ ~ detect ~ ~-1 ~ minecraft:grass 0 /kill @p[c=1] in 1.13. It doesn't work for me, because this code was used in version 1.9 or thereabouts.  I'm  playing on PC.  How do you do execute this command in 1.13?
3479
I need help with a specific command that I am using in a new game that I am creating inside of Minecraft. The command is:  /give @p sign 1 0 {BlockEntityTag:{Text1:"{"text":" [MF2]","color":"gold","clickEvent": {"action":"run_command","value":"tellraw @a [""{"text":"[MF2]  ","color":"gold"},{"selector":"@p","color":"dark_aqua"},{"text":" is now an admin of the server!","color":"white"}]"}}",Text3:"{"text":"Click to join Admin","color":"dark_aqua","clickEvent": {"action":"run_command","value":"scoreboard teams join admin @p"}}"},display: {Name:"Custom Sign"}}   If I take out the /tellraw command then the command works fine, but I need the command in there to announce to the game that a new admin has joined.  With the tellraw command, the error message is the following:  Data tag parsing failed: Unexpected token 't' at: text":" [MF2]","color":"gold","clickEvent":{"action":"run_command","value":"tellraw @a [""{"text":"[MF2] ","color":"gold"}, {"selector":"@p","color":"dark_aqua"},{"text":" is now an admin  of the server!","color":"white"}]"}}",Text3:"{"text":"Click to join Admin","color":"dark_aqua","clickEvent": {"action":"run_command","value":"scoreboard teams join admin @p"}}"   If anyone knows how to fix this, please let me know.
17086
I'm wondering something. Whenever i right click on minecraft and click open with another application, i try to find Java JDK. I have installed it for minecraft itself, but i just cant find where java is on the list of other applications. Any help?
13768
I want to render a cube-mesh (a.k.a. Minecraft-style) world. If I render each existing cube it will eat up FPS pretty quickly. How can I optimize it? I understand that the point is to not render invisible meshes (faces?) but my problem is to find out what is invisible and what isn't.
121936
I had everything working fine, I use a number of openGL graphics software, example pymol, mgltools, vmd, ballview, rasmol etc.  All of these give the error:  Xlib:  extension "GLX" missing on display ":0".    and fail to initialize.  I have an i7 asus k53s with nvidia gforce   I need these to do my work.  I tried the umblebee fix, and just removing all nvidia drivers, or rolling back.  I do not know why these were working then stopped, but did notice a new nvidia console in the mu which I assume was from enabling the automatic nvidia feeds, etc?  I also played with the xorg, however have no clue what settings are valid.  In addition, the display is 50% of the time not recognized now?  It just gives a geeic 640x480 and I have to login and out 10 times to get it to return to a normal setting.  When I try and set it manual, there is no other setting allowed from the settings menus, and the terminal changes just get re set every time I log out?
102682
I have tried anything that came into mind: Reset modem, add Minecraft to exception list etc. Now this is the launcher that claims it doesnt need Java, is that true or not? because as far as I know the latest version of Java is on my PC. I can play Minecraft Vanilla just fine with FTB and Technic but Voxelmap needs Liteloader and it claims that Minecraft Vanilla from Technic doesnt have a Launcher Profile so I had to resort to using the official one.
71584
I just re-purchased Minecraft (because my old profile stopped working so I bought it) after not playing it for a couple of months. I've added a bunch of servers, but almost every one says "can not connect."  I know its not because the server is not 1.7.2, because I checked that they'd update. It will say "server can't connect" after a long time. I don't know if its me or the servers.  My server screen looks like this (notice the one at the bottom – it's still loading!):
47394
I want to install and test 3d acceleration in Ubuntu 12.  I have read these pages:       I think I have installed it correctly, but I don't know how to test it.  I tried to play minecraft in the browser, but I got a black screen. It may be a java problem too, so I need to troubleshoot.  So how can I test my video card and drivers?
38603
I downloaded Blender 64 bit and the OS indicated that the program was not compatible with my computer chip. I then downloaded the 32 bit version which seemed to allow me to install. However the blender Icon in windows when pressed informs me that the program is not a window application. I have an Intel(R) Core (TM)2 Duo CPU E7300 @2.66Ghz if that is important and I am running XP. I am fairly sure I am doing something wrong here- can anyone help please?
90662
I have just updated to Minecraft 1.7.4 and now all of a sudden there are barely any mobs spawning.  I checked to make sure that I was in normal difficult and I saw 1 creeper but that is all.  Also I tried different difficulties. Another thing - mobs seem to to spawn normally in the nether and all other mobs except aggressive mobs spawn like they should.  Please if you know how to fix this, please help!
509
I'm writing my own clone of Minecraft (also written in Java). It works great right now. With a viewing distance of 40 meters I can easily hit 60 FPS on my MacBook Pro 8,1. (Intel i5 + Intel HD Graphics 3000). But if I put the viewing distance on 70 meters, I only reach 15-25 FPS. In the real Minecraft, I can put the viewing disntance on far (= 256m) without a problem. So my question is what should I do to make my game better?  The optimisations I implemented:   Only keep local chunks in memory (depending on the player's viewing distance) Frustum culling (First on the chunks, then on the blocks) Only drawing really visible faces of the blocks Using lists per chunk that contain the visible blocks. Chunks that become visible will add itself to this list. If they become invisible, they are automatically removed from this list. Blocks become (in)visible by building or destroying a neighbour block. Using lists per chunk that contain the updating blocks. Same mechanism as the visible block lists. Use nearly no new statements inside the game loop. (My game runs about 20 seconds until the Garbage Collector is invoked) I'm using OpenGL call lists at the moment. (glNewList(), glEndList(), glCallList()) for each side of a kind of block.   Currently I'm even not using any sort of lighting system. I heard already about VBO's. But I don't know exactly what it is. However, I'll do some research about them. Will they improve performance? Before implementing VBO's, I want to try to use glCallLists() and pass a list of call lists. Instead using thousand times glCallList(). (I want to try this, because I think that the real MineCraft doesn't use VBO's. Correct?)  Are there other tricks to improve performance?  VisualVM profiling showed me this (profiling for only 33 frames, with a viewing distance of 70 meters):    Profiling with 40 meters (246 frames):    Note: I'm synchronising a lot of methods and code blocks, because I'm generating chunks in another thread. I think that acquiring a lock for an object is a performance issue when doing this much in a game loop (of course, I'm talking about the time when there is only the game loop and no new chunks are generated). Is this right?  Edit: After removing some synchronised blocks and some other little improvements. The performance is already much better. Here are my new profiling results with 70 meters:    I think it is pretty clear that selectVisibleBlocks is the issue here.  Thanks in advance! Martijn  Update: After some extra improvements (like using for loops in stead of for each, buffering variables outside loops, etc...), I now can run viewing distance 60 pretty good.  I think I'm going to implement VBO's as soon as possible.  PS: All source code is available on GitHub:
72925
Lets say that when you open your Minecraft Launcher you don't see anything and it is all gray. When you click on the launcher it says it is no longer responding and crashes.
50381
Unlike when the game crashes it goes to a black screen and then the stack trace. This time the game just closes and leaves a nice hs_err_pid.txt file for us, which you can find .  I've checked around Google and most people's answer is to Update my Graphics card, I have attempted this and the AMD Auto Detect application just tells me that it's up to date.  System: I record with Fraps sometimes but this does not mean that this causes it (it happens when not recording too). I also run Minecraft on a RAMDisk that has 512MB.  Can anyone give me any advice about this?
54718
I want to create a png file that is an animation of fire for a Minecraft resource pack. I can render the images as separate files and painstakingly put them together in Photoshop. I would rather see if I can do that in Blender or with another tool?  Here is an example of the desired outcome. Sorry for the size.
92910
I would like to . Apparently this is possible as of Minecraft 1.4.2, so how do I do it?
32532
I have updated my drivers, updated java, restarted my computer and downloaded the game several times. When I try to play the game everything is duplicated in opaque red and blue. Does anyone else have this problem?