Comment 58 for bug 1785171

Some more information, somewhat related to this bug. I bought a NUC 8i5 with an Intel onboard Ethernet. Installed Ubuntu Server 19.04 on it, and quickly had poor networking speed: ping would rise to 600ms on the LAN (like, on the same switch as my computer) as soon as I tried to install something through apt. Resetting the interface would fix the ping on the LAN for SSH sessions, but as soon as a download would restart, the ping would rise again.

I downloaded the latest 3.4.2.1 driver from Intel (vs. the 3.2.6 driver included in Ubuntu Kernel), built it (commenting get_settings and set_settings, since it seems to have been removed) and it seems to have fixed the issue (consistent 0.4-1.1ms ping on LAN, no troubles downloading at full speed vs. being capped at 100KB/s in best-case scenario).

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lshw:

        *-network:1
             description: Ethernet interface
             product: Ethernet Connection (6) I219-V
             vendor: Intel Corporation
             physical id: 1f.6
             bus info: pci@0000:00:1f.6
             logical name: eno1
             version: 30
             serial: 94:c6:91:af:3c:10
             width: 32 bits
             clock: 33MHz
             capabilities: bus_master cap_list ethernet physical
             configuration: broadcast=yes driver=e1000e driverversion=3.4.2.1-NAPI firmware=0.4-4