Revision as of 22:55, 12 January 2013

Troubleshooting guide

This guide provides some common issues that people may have when trying to play Minecraft, and solutions that they can use to fix such problems.

If you require further assistance with fixing your computer, please feel free to come along to the IRC channel called #minecrafthelp on esper.net, using an IRC client such as mIRC, xChat, or by using esper.net's web access to #minecrafthelp

Unable to start Minecraft Launcher

No accelerated OpenGL mode

You try to run Minecraft and it says:

   Minecraft was unable to start because it failed to find an accelerated OpenGL mode.

Problematic frame or pixel format not accelerated

The Minecraft launcher won't start and a file called hs_err_pid.log is created that mentions a problematic frame, or Java tell you that you have bad video card drivers due to pixel format not accelerated.

Graphics driver update isn't effective

Wrong ELF class: ELFCLASS32

You try to run Minecraft and you get an error report about having the wrong ELF class.

   Exception in thread "Minecraft main thread" java.lang.UnsatisfiedLinkError:
       /home/taylor/.minecraft/bin/natives/liblwjgl.so: wrong ELF class: ELFCLASS32

Cannot Log In

Can't connect to minecraft, unable to find valid certification path

Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

Completely uninstall ESET - just disabling it doesn't deal with certain hooks that it has within the system.

Reference http://www.minecraftforum.net/topic/1266137-solved-can-not-log-in-cant-connect-to-minecraftnet/

Can't connect to minecraft

Can't connect to minecraft.net, and lower part of launcher has a black background

Cannot connect to minecraft.net when attempting to log in via the launcher, and the login section at the lower part of the launcher has a black background, instead of the normal dirt background.

Connection to minecraft.net fails, with HTML text up in the news panel

Cannot connect to minecraft.net when attempting to log in via the launcher, and HTML content appears in the news panel, for example:

   <html><body><font color="#808080"><br><br><br><br><br><br><br><center>Failed to update news<br>
   java.net.someKindOfException: An error message of some kind here</center>&lt/font></body></html>

Cannot play

Update unable to complete

When the launcher tries to update, the update isn't able to finish.

org.lwjgl.LWJGLException: Could not create context

When the launcher tries to run Minecraft, you get a crash report that says:

   org.lwjgl.LWJGLException: Could not create context

UnknownHostException: session.minecraft.net

You can login to Minecraft but when you try to connect to a multiplayer server, you get an error about session.minecraft.net that says:

   Internal client error: java.net.UnknownHostException: session.minecraft.net

@@ Line 36: / Line 36: @@
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-== Can't connect to minecraft.net, and lower part of launcher has a black background ==
+=== Can't connect to minecraft.net, and lower part of launcher has a black background ===
 Cannot connect to minecraft.net when attempting to log in via the launcher, and the login section at the lower part of the launcher has a black background, instead of the normal dirt background.
 {{main|User:Pmw57/Minecrafthelp/Troubleshooting/lower_part_of_the_launcher_has_a_black_background}}

Changes: User:Pmw57/Minecrafthelp/Troubleshooting