In the first scene when I pick up the glowstick the game freezes and I cannot move or look around anymore. Music continues and background effects such as dripping from the ceiling still work. If I move about without picking up the glowstick it freezes after a few minutes anyway.
I looked through the troubleshooting guide and attempted turning off post effects and steam overlay. Penumbra has write permissions on its folder and this is a fresh install so no edits to configurations have been made (except after I noticed the problem).
I am playing Penumbra on Steam, the OS is Ubuntu 16.04.
HPL log attached.
Graphics card is GeForce GTX 980M