Everyting stop on PureOS, only reset helps

After boot and log in, few or several minutes, everything just stop. No mouse, no keyboard. Monitor crash a little bit the last view.

I had this issue in the past with ubuntu and linux lite. I think this is from the nvidia card. When I install the nvidia driver, problem disappear.
Can you help me with PureOS. Is this the same issue, or another? What to do?