In looking at the list of linux headers I saw:
Code:
linux-headers-5.10.4-051004-generic - Linux kernel headers for version 5.10.4 on 64 bit x86 SMP
Since I had this version of the kernel in grub, I selected it and ran the displaylink executable. It installed successfully. I guess it needs the "-generic" part to install? Not sure. Anyway. Thanks for your help.