Question

When I run my pygame code it bogs down the system. PyGame becomes unresponsive and it slows down Ubuntu so much that I’ve had to force a shut down twice.

I posted a very similar question here:
Why is my basic PyGame module so slow?

but I decided to rephrase it because when I asked the original question I wasn’t aware of the full symptoms.

Answer 1

You should limit the fps, you can use clock.tick for that

while true:
    for event in pygame.event.get():
        #manage your events
    #update your sprites
    screen.blit(...) #draw to screen
    pygame.display.flip()
    clock.tick(30)