Ok, i tried looking at the sound and set it to openAL, the i enabled VBO in graphics and it works!  I am now ingame talking to NPC's Thx all for the pointers. 

So if anyone else runs into a simular problem, lets list here...
It seems the engine/xorg or something in that line has an issue with certain locale's i was using en_DK utf8, which is apparently conflicting. So what i did was, change the locale to en_US utf8 and that stopped the launcher from crashing at startup. Then i set the sound to openAL and enabled VBO, which stopped the game from crashing with a segmentation fault, when i entered the world. Hope this can help someone in the future and maybe the Dev's can figure out a way to get the launcher to handle the "strange" locale's...

Ok, update.... I found out that thru someone having the same errors, but with a different program, that apparently my locale setting was conflicting with xorg-server (i think). Anyhow, i changed locale to en_US and i could now start the launcher and create my avatar. It loaded the world, but i didn't even get to finish reading the introduction before the game crashed with another Segmentation Fault... :/

Last 3 Lines in terminal:
planeshift.application.client:
  PSLoader: step 6: success
Segmentation fault (core dumped)
Eonwind: I installed it from AUR with pamac.

Thank you.
I have the drivers directly from nvidia, not the opensource one. That OpenGL driver you mention, is that part of the nvidia driver? If so, it should be installed...

edit:
Packages installed: nvidia-340xx, nvidia-340xx-utils, nvidia-340xx-libgl

edit:
Been searching around a bit and found some openCL drivers. Are those the one you mention?