Xilinx Alveo U200 Getting Started page 39

Table 4: Known Issues (cont'd)
Area
General
General
General
General
UG1301 (v1.8) February 5, 2021
Getting Started with Alveo Accelerator Cards
Description
Driver may not be loaded properly
after boot up (or reboot).
The Alveo card has not trained to the
full expected PCI Express link width or
link speed. The output from xbutil
validate will look like the following:
$ INFO: Validating device[0]:
INFO: Checking PCIE link
status: FAILED WARNING: Device
trained to lower spec. Expect:
Gen3 x16, Current: Gen2x16
The card is not present when running
xbutil or lspci. The card may not
have been ready when the server
enumerated PCI Express.
Card does not show up when running
lspci and the red LED on the card is
illuminated.
Chapter 7: Troubleshooting
Comments/Recommendations
After boot up (or reboot), run these
two commands to load the device
driver:
$ sudo rmmod xclmgmt
$ sudo modprobe xclmgmt
Ensure that the Alveo card is plugged
into a Gen 3x16 capable slot, and that
the power cable is connected. Then
cold reboot and see if the card trains to
the correct settings.
Potential Fix: Warm Reboot the server,
Disable Fast Boot.
When card is first installed in server,
BIOS may not recognize the card
correctly and red LED on card is
illuminated, indicating an error.
Cold boot the server four times until
the blue LED on the card is illuminated,
indicating the card is successfully
running.
If the red LED is still illuminated,
disconnect the power to the sever for 5
minutes and repeat the step above.
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