背景：我的连接下载速度为 1000 mb/s，上传速度为 40 mb/s。我经常从有线设备获得非常接近该速度的测试结果。
我最近买了一台便宜的迷你电脑来玩，它预装了 Win10。我把它拆开，通过以太网连接到我的 EdgeSwitch（它本身连接到我的 EdgeRouter），启动 Windows，并进行了一些速度测试，结果范围从使用时的 900+ 下载/40 到speedtest.net使用 Comcast 商业速度测试时高达 1599 下载/43 上传。
然后，我制作了一个装有 20.04 的可启动 USB 盘，重新启动 USB 设备，并在机器上安装了一份全新的 Ubuntu Desktop。现在，仍然使用相同的有线连接，我只能得到 30 分/40 分。如果我禁用以太网连接并通过 WiFi 连接，下载速度为 200-300/上传速度为 40。如果我将我的任何一台笔记本电脑插入 Ubuntu 盒子使用的同一根电缆，我的下载速度将再次达到 900+ mb/s。
到目前为止我已经尝试过的事情（经过我能想到的所有疯狂的谷歌搜索）：
- 该机器有 Realtek RTL8111/RTL8168 NIC。我删除了可能导致问题的 r8169 驱动程序，并安装了 r8168 驱动程序。没有区别。
- 使用 ethtool 验证接口是否设置为全双工（确实如此）。尝试关闭自动协商并手动将其设置为全双工。没有区别。
- 检查 IP 路由是否有任何异常。默认路由是正确的。
- 已禁用 IPv6。
- 检查了所有相关的 BIOS 设置。尝试禁用 LAN 唤醒。BIOS 中没有其他与 NIC 相关的设置。没有区别。
如果有人能想到其他可以检查/尝试的方法，我将不胜感激。此时我已经用尽了我的知识。提前致谢。
根据请求，结果sudo lshw -C network（enp1s0 是所讨论的接口）：
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:01:00.0
logical name: enp1s0
version: 15
serial: 5c:85:7e:40:89:c2
size: 1Gbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8168 driverversion=8.048.00-NAPI duplex=full ip=192.168.1.15 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
resources: irq:127 ioport:e000(size=256) memory:a1304000-a1304fff memory:a1300000-a1303fff
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:02:00.0
logical name: enp2s0
version: 15
serial: 5c:85:7e:40:89:c3
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8168 driverversion=8.048.00-NAPI latency=0 link=no multicast=yes port=twisted pair
resources: irq:129 ioport:d000(size=256) memory:a1204000-a1204fff memory:a1200000-a1203fff
*-network DISABLED
description: Wireless interface
product: Wireless 3165
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:04:00.0
logical name: wlp4s0
version: 91
serial: 24:41:8c:15:f9:6e
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=5.4.0-42-generic firmware=29.1654887522.0 latency=0 link=no multicast=yes wireless=IEEE 802.11
resources: irq:131 memory:a1100000-a1101fff
*-network:0
description: Ethernet interface
physical id: 1
logical name: veth6ffe1c4
serial: 6a:02:41:90:a4:6a
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
*-network:1
description: Ethernet interface
physical id: 2
logical name: br-4a0d5cc98154
serial: 02:42:6d:97:46:a3
capabilities: ethernet physical
configuration: broadcast=yes driver=bridge driverversion=2.3 firmware=N/A ip=172.18.251.1 link=yes multicast=yes
*-network:2
description: Ethernet interface
physical id: 3
logical name: veth6b2e330
serial: 0a:cd:f8:bc:97:4d
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
*-network:3
description: Ethernet interface
physical id: 4
logical name: br-8248484a3e46
serial: 02:42:31:06:62:49
capabilities: ethernet physical
configuration: broadcast=yes driver=bridge driverversion=2.3 firmware=N/A ip=172.18.251.129 link=yes multicast=yes
*-network:4
description: Ethernet interface
physical id: 5
logical name: vethab446ab
serial: 12:2c:81:08:fa:68
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
*-network:5
description: Ethernet interface
physical id: 6
logical name: vetha7734c2
serial: 2a:83:79:5a:c8:e7
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
*-network:6
description: Ethernet interface
physical id: 7
logical name: veth67b3a82
serial: 56:9d:e3:98:b5:01
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
*-network:7
description: Ethernet interface
physical id: 8
logical name: veth7ac8a55
serial: 66:c0:27:fc:19:56
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
*-network:8
description: Ethernet interface
physical id: 9
logical name: vethcefd008
serial: 5e:42:a4:e0:08:43
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
*-network:9
description: Ethernet interface
physical id: a
logical name: veth99ea1fc
serial: 2e:86:07:86:64:e9
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
*-network:10
description: Ethernet interface
physical id: b
logical name: docker0
serial: 02:42:04:ba:ff:72
capabilities: ethernet physical
configuration: broadcast=yes driver=bridge driverversion=2.3 firmware=N/A ip=172.17.0.1 link=no multicast=yes
*-network:11
description: Ethernet interface
physical id: c
logical name: vethd3648ee
serial: 32:06:af:d8:c7:92
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
*-network:12
description: Ethernet interface
physical id: d
logical name: veth6ae5338
serial: 76:91:8e:00:9a:0b
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
*-network:13
description: Ethernet interface
physical id: e
logical name: vethbc28f40
serial: 8a:ce:b8:73:02:86
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
*-network:14
description: Ethernet interface
physical id: f
logical name: veth6278cb8
serial: de:dd:8b:d6:eb:af
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
*-network:15
description: Ethernet interface
physical id: 10
logical name: veth1494606
serial: ca:4c:79:f9:03:2f
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s