22 Keysight PXI/AXIe Chassis Reference Guide
Guidelines to Diagnose and Resolve Communication Problems
Newer laptops with 11th Gen or newer Intel CPUs (e.g. HP ZBook Power G8, Dell
Precision 3560) with built-in Thunderbolt support can handle these larger
memory requests, and is recommended. Desktop workstations are not
recommended with Thunderbolt applications. In general, the Thunderbolt
connection system can only support one chassis and another Thunderbolt
non-chassis device (e.g. monitor or external storage drive).
Flattening Portal Bridge (FPB) Workaround
There is a known issue on some versions of Windows 10 with the Flattening
Portal Bridge (FPB) feature incorrectly configuring the hardware and resulting in
failure to enumerate the chassis and modules correctly. If you run into PCIe
enumeration issues (e.g. Code 12 errors), disable the FPB using the following
instructions to see if that resolves the issue.
1 Click Start and type regedit in the Start Search box.
2 Navigate to regedit in the list and left-click.
3 Locate the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\PnP\Pci
4 If the HackFlags registry entry is not present:
a On the Edit menu, point to New, and then left-click DWORD (32-bit) Value.
b Type HackFlags and press ENTER.
c On the Edit menu, left-click Modify.
d In the Value data box, type 0100000.
e Select Hexadecimal in the Base area, then left-click OK.
f Exit Registry Editor.
5 If the HackFlags registry entry is present:
a Right-click HackFlags, then left-click Modify.
b In the Value data box, type 0100000.
c Select Hexadecimal in the Base area, then left-click OK.
d Exit Registry Editor.
6 Your new entry should look like the screen shot below:
7 Reboot the system
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