Can't detect the DE5-Net FPGA Board After Use Flash to Program Image to the Board

Hi everyone,

I can run the FPGA test example within with in the package CD on the DE5-Net network board. But every time after I reboot the machine, the machine can't detect the FPGA board. I have to turn off the power and turn on again so that the board can be used again(Reboot is not enough). Every time when after I tried to test the example on the FPGA board, the error "MMD INFO : [acl0] PCIe-to-fabric read test failed, read 0xffffffff after 1 attempts" shows up and I have to turn off and turn on the machine again. The FPGA can work until this morning. After I used "aocl flash acl0 bin/fft2d.aocx” to program fft2d.aocx OpenCL image onto the startup configuration flash of DE5-NET" to download the image file into the FPGA board, and I turn off and turn on again as usual to make it work. After that, I can't detect the board till now. I reinstalled the OS and then followed the same steps many times I did to configure the FPGA, but it can't be detected with "$aocl diagnose" and even $lspci ! I have two DE5-net board and changed it with the other one, and I changed the slot of PCIe to plugin, but it still can't detect the board.

I appreciate if you have any suggestion. I will be waiting online to get the solution.

Best regards,

Jiawen