That always happens under Linux when you close your laptop or otherwise suspend. The pulse library doesn't survive that and then the audio thread of factory no longer finished when you quit and the game hangs.

I reported that some time ago but it was put into "won't fix".


I'm playing on ...

After multi hour session playing Factorio on Steam I tried to quit the game by clicking exit button in the menu. Game didn't quit, but I left it running anyway as I was hoping it would eventually quit.

I didn't check the clock, but maybe half an hour later Factorio was still running. I tried to ...