I've encountered an issue where installing Xen >4.10 on a Dell Optiplex will break the onboard NIC. This issue persists if the computer is booted without Xen, after OS reinstall, and even if removing the SSD and HDD completely to boot from a LiveUSB. The only way to fix the issue is to install Windows 10 on the machine. This appears to "fix" the firmware of the NIC. After reinstalling Ubuntu, the NIC continues to work (until Xen is installed again).
This bug was confirmed with both Xen 4.10 and 4.12 installed on Ubuntu 18.04. If this is a known issue, is there some "in-work patch" I can be pointed to?
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