Hello, accidentally, I got a skylake-sp with integrated fpga. After some investigations, I find I could not drive it for anything. I am a little surprising and not sure if your guys can give some lights? 1. default shipped stuff does not work although basic cmds works: under centos 7.4: ---------- fpgainfo fme ---------- Board Management Controller, microcontroller FW version unavailable Last Power Down Cause: unavailable Last Reset Cause: unavailable (can't open) //****** FME ******// Object Id : 0xEF00000 PCIe s:b:d:f : 0000:7E:00:0 Device Id : 0xBCC0 Socket Id : 0x00 Ports Num : 01 Bitstream Id : 0x6400002FC614BB9 Bitstream Version : 0x558900000406 Pr Interface Id : 1a422218-6dba-448e-b302-425cbcde1406 ---------- fpgainfo bmc ---------- Board Management Controller, microcontroller FW version unavailable Last Power Down Cause: unavailable Last Reset Cause: unavailable (can't open) //****** BMC SENSORS ******// Object Id : 0xEF00000 PCIe s:b:d:f : 0000:7E:00:0 Device Id : 0xBCC0 Socket Id : 0x00 Ports Num : 01 Bitstream Id : 0x6400002FC614BB9 Bitstream Version : 0x560000000406 Pr Interface Id : 1a422218-6dba-448e-b302-425cbcde1406 ---------- fpgainfo port ---------- //****** PORT ******// Object Id : 0xEC00000 PCIe s:b:d:f : 0000:7E:00:0 Device Id : 0xBCC0 Socket Id : 0x00 Ports Num : 01 Bitstream Id : 0x6400002FC614BB9 Bitstream Version : 6.4.0 Pr Interface Id : 1a422218-6dba-448e-b302-425cbcde1406 Accelerator Id : d8424dc4-a4a3-c413-f89e-433683f9040b Accelerator GUID : d8424dc4-a4a3-c413-f89e-433683f9040b hello_fpga hangs forever: ... run on bus 0x7e (hangs forever here) And nlb0 output like this: [2860][ERROR][nlb0] test timeout at 1 cachelines. under kernel 4.20.x with upstreaming DFL driver: the output is same like below (except that the Socket Id is show as 0xFF, in fact there seems no "Socket Id" exposed under DFL driver). now my question is: how to further debug for this case?(assumed the cpu should work) 2. the downloadable acceleration-stack[1] is just for PAC, not for intg_xeon. So I can not use this tool to re-generate/re-config a new gbs in that the bbs for intg_xeon does not exist. And so the naming of "Intel® Acceleration Stack for Intel Xeon® CPU with FPGAs" is a little deceptive. Or (hopefully) am I wrong about this tool? best regards, Jin Mingjian [1] https://www.intel.com/content/www/us/en/programmable/solutions/accelerati...