Yesterday, I upgraded unstable from stable and installed a new kernel, but I couldn't get into the system with the new kernel. I got an error
[ 26.367633] nvme 0000:01:00.0: AER: PCIe Bus Error: severity=Corrected, type=Data Link Layer, (Transmitter ID) [ 26.367633] nvme 0000:01:00.0: AER: device [1e0f:0009] error status/mask=00001000/00006000