Launching 1.12.2 throws java.lang.ExceptionInInitializerError while initializing OpenGL

Not at all... Does Ubuntu 18.04 look like windows?...

Game bar of "loading" gets to 100% but the game never starts

I'ma try reinstall minecraft this time erasing settings and other stuff... I found a crash report even if there's no crash message. I'm sorry for this, last time I searched for stuff in minecraft folders was long ago, I will see if this fixes the issure...

It came to my mind that optifine settings file broke the game

didnt work

I tryed to open othr versions. They all crash the same way. No version works below 1.13

feel dump for not finding the error report... hope it helps a bit

---- Minecraft Crash Report ----
 // Don't be sad. I'll do better next time, I promise!

Time: 7/24/18 8:57 PM
 Description: Initializing game

java.lang.ExceptionInInitializerError
 at bib.av(SourceFile:661)
 at bib.aq(SourceFile:456)
 at bib.a(SourceFile:404)
 at net.minecraft.client.main.Main.main(SourceFile:123)
 Caused by: java.lang.ArrayIndexOutOfBoundsException: 0
 at org.lwjgl.opengl.LinuxDisplay.getAvailableDisplayModes(LinuxDisplay.java:951)
 at org.lwjgl.opengl.LinuxDisplay.init(LinuxDisplay.java:738)
 at org.lwjgl.opengl.Display.<clinit>(Display.java:138)
 ... 4 more

A detailed walkthrough of the error, its code path and all known details is as follows:
 ---------------------------------------------------------------------------------------

– Head –
 Thread: Client thread
 Stacktrace:
 at bib.av(SourceFile:661)
 at bib.aq(SourceFile:456)

– Initialization –
 Details:
 Stacktrace:
 at bib.a(SourceFile:404)
 at net.minecraft.client.main.Main.main(SourceFile:123)

– System Details –
 Details:
 Minecraft Version: 1.12.2
 Operating System: Linux (amd64) version 4.15.0-29-generic
 Java Version: 1.8.0_171, Oracle Corporation
 Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
 Memory: 138472512 bytes (132 MB) / 201326592 bytes (192 MB) up to 2147483648 bytes (2048 MB)
 JVM Flags: 7 total; -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
 IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
 Launched Version: 1.12.2
 LWJGL: 2.9.4
 OpenGL: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.
 GL Caps: 
 Using VBOs: Yes
 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)
 CPU: <unknown>

Kepler; I am having the same issue on my Ubuntu 18.04 using SNAP.

I went to Minecraft.net and downloaded it from there.

I am able to launch Minecraft using that download (not the snap version); but I cannot connect to any servers:  The authentication servers are currently down for maintenance.  (but my Windows machines and other Ubuntu connect just fine)

If you have time; would you mind installing from Minecraft.net and see if it works and if you can connect to an online server?

Hopefully this will either fix your issue or restore some of my sanity in knowing that someone else is having the same issue.

*EDIT:  I should note that the Minecraft.net version requires libgconf2-4 to be installed.

Thanks @mike skummer it helped me

Mojang?  Any word on a fix?  Still getting the following error when attempting to connect to an MC server.

Failed to connect to the server

Failed to login: The authentication servers are currently down for maintenance.

@kumasasa thanks for the link, I'll keep track of that issue as well.

But since it's "just" a note regarding the mentioned workaround, the original error still persists here.

This issue is also affecting launcher version 2.1.1349

luckily it does not affect my computer.

I encountered this issue while setting up Minecraft on a new PC running Gentoo Linux (not Debian-based, so using the deb file as a workaround is not an option), using the new linux launcher v2.1.3676. No version of the game prior to 1.13 would start, citing the same "Initializing gamejava.lang.ExceptionInInitializerError" caused by opengl context errors others have listed above.

I found the actual fix under MCL-9378 which is marked as a duplicate of this bug, it was provided in a comment by @urielsalis: fix is to install xrandr.

Commenting here so the information is available in the currently open bug.

Closing as "wont fix" as the original issue is very old and might not be relevant anymore. If we experience this bug again, please create a new issue.