Try Debian on it, half the reason I switched away from Ubuntu years back was that it always seemed to have show stopping bugs like what you've experienced. I've

Try Debian on it, half the reason I switched away from Ubuntu years back was that it always seemed to have show stopping bugs like what you've experienced. I've yet to have PulseAudio crash on my T420, though sometimes it buffers audio when I walk too far from my bluetooth speaker.