The recent SX8200 review was well-timed for me, so went ahead with the 1tb model. Installed into XPS 9750 and, independently from L1, threw Pop!_OS 19.04 on it.
It does not currently work. Goes to suspend and NVMe does not come back up - briefly showing APST error 19 and RW failures after that. Recommended kernel parameters
nvme_core.default_ps_max_latency_us set to 0 and high like 8000 APST values change nothing.
It otherwise seems to function correctly. I post it in the SSD category as from Googling it seems to be a distro-agnostic hardware-specific type of problem, even after some fixes in 4.11 kernel.
Anyone else knows how to deal with suspending SX8200?