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Hi my name is FuntimeWolf_Fz and my launcher for 1.12.2 keeps crashing and i need 1.12.2 for my friends because there PCs can't handle the server on 1.13.2 and this happened recently and i need this problem fix ASAP please. https://paste.ubuntu.com/p/hYWfQCCsP2/

It would help if you would show us the entire dxdiag log. Post the crash report too while you're at it.

this pop up every time:

The game crashed whilst unexpected error
Error: java.lang.RuntimeException: No OpenGL context found in the current thread.

I don't know what to do?

--- Minecraft Crash Report ----
// There are four lights!

Time: 1/29/19 8:19 AM
Description: Unexpected error

java.lang.RuntimeException: No OpenGL context found in the current thread.
at org.lwjgl.opengl.GLContext.getCapabilities(GLContext.java:124)
at org.lwjgl.opengl.GL11.glGetError(GL11.java:1299)
at bus.L(SourceFile:838)
at bib.a(SourceFile:950)
at bib.az(SourceFile:1005)
at bib.a(SourceFile:419)
at net.minecraft.client.main.Main.main(SourceFile:123)

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

-- System Details --
Details:
Minecraft Version: 1.12.2
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 145121616 bytes (138 MB) / 268435456 bytes (256 MB) up to 2147483648 bytes (2048 MB)
JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -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 GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: Yes
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs:
Current Language: English (US)
Profiler Position: N/A (disabled)
CPU: 12x Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz

Reinstall MC from scratch http://hopper.minecraft.net/help/guides/reinstalling-minecraft/