Hi, every now and then (I’d say a few times in the past 2 months) my laptop freezes, the desktop disappears and I see the dmesg on screen, which shows NVMe I/O errors and other messages about CPU stalls. See for example the attached picture.
That looks very bad to me. Try hdparm -t /dev/nvme0n1 several times to see if you get similar dmesg errors. If smartctl -x /dev/nvme0n1 output isn’t useful, check with your nvme vendor’s RMA department. It may tell you to contact your motherboard vendor, to use it’s own checking utility, or to submit an RMA request.