Kernel.org: 5.1.15
sid (unstable): 4.19.37-5
buster (testing): 4.19.37-5
stretch (stable): 4.9.168-1+deb9u3
jessie (oldstable): 3.16.68-2

Debian GNU/Linux device driver check & report

IBM: X3550 M4

PCI IDWorks?VendorDeviceDriverKernel
1000005bYesLSI Logic / Symbios LogicMegaRAID SAS 2208 [Thunderbolt]megaraid_sasv2.6.38-

driver v2.6.38 (2013-03-01T17:27:25+00:00)