Minecraft DEMO Crash problem

I woudn't like to purchase Minecraft, so I downloaded the DEMO version of it. whenever I try to start the game, it crashes, and the window says: The game crashed whilst initializing game
Error: org.lwjgl.LWJGLException: Pixel format not accelerated

I tried to follow the instructions from another website, and they said I will get more instructions how to get it fixed.

Here's the URL for my DxDiag text document on Ubuntu Pastebin: https://paste.ubuntu.com/p/b5cc7nhcSs/