Can you upload the output of "glxinfo" ?
Also which dolphin version is this? 4.0 is quite old, but I've seen some distributions which spread out git snapshots as 4.0.X :/
Dolphin did improve quite a lot in the last one and a half year since 4.0
Also which dolphin version is this? 4.0 is quite old, but I've seen some distributions which spread out git snapshots as 4.0.X :/
Dolphin did improve quite a lot in the last one and a half year since 4.0