这似乎与昨天提出的另一个问题相同。
我在使英特尔千兆接口全速运行时遇到了问题。
系统是 Supermicro X7DA8 双 Xeon。主板上有两个 Intel“Pro/1000 EB”接口。
该系统双启动 Ubuntu Studio 20.04.4 和 MS Windows 7 Pro x64。
该系统用于备份配备 8 个 4TB SAS 磁盘的 Supermicro 服务器。它取代了更老的四核 Opteron 服务器，后者的速度不是问题，但新服务器大多数时间都会使 GigE 线路饱和，并且分区更大，因此 GigE 速度必不可少。
该接口被 Windows 7 识别为 1 Gb/s 接口；我之前在其上运行了 FreeBSD（我的服务器后端自 1990 年代初以来一直是 FreeBSD），并且始终以 1 Gb/s 的速度连接。
另一个问题有一个运行请求ethtool：
ethtool enp6s0f1
Settings for enp6s0f1:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Speed: 100Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
MDI-X: on (auto)
Cannot get wake-on-lan settings: Operation not permitted
Current message level: 0x00000007 (7)
drv probe link
Link detected: yes
我运行了常规的lshw和dmesg并发现dmesg以下内容：
[52.221560] e1000e 0000:06:00.1 enp6s0f1: Link Speed was downgraded by SmartSpeed.
如果速率为 100 Mb/s，驱动程序代码似乎会选择“将中断节流率（ints/sec）设置为动态保守”，但我还没有进一步研究（目前还没有）。
这是电缆损坏的信号。
系统使用标有“CAT 6”的新电缆连接，但我购买了新的“CAT 6”电缆，安装时电缆的链接速度为 1 GB/ps。重启后，速度为 100 Mb/s，断开连接并重新连接不会改变这一点。
我尝试启动当前的 Xubuntu 版本 22.04.2，它的链接速度也为 100 Mb/s。
我看到最近的一则消息称，有一个内核错误影响了英特尔芯片，但到目前为止我还没有看到真正的公告。
我已经订购了非英特尔 GigE 网卡，它可能会提供一种解决方法。
dmesg过滤后的输出为e1000：
[ 1.274549] e1000e: Intel(R) PRO/1000 Network Driver
[ 1.274593] e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
[ 1.280921] e1000e 0000:06:00.0: Interrupt Throttling Rate (ints/sec) set to dynamic conservative mode
[ 1.341558] e1000e 0000:06:00.0 eth0: (PCI Express:2.5GT/s:Width x4) 00:30:48:7e:cb:cc
[ 1.341577] e1000e 0000:06:00.0 eth0: Intel(R) PRO/1000 Network Connection
[ 1.341658] e1000e 0000:06:00.0 eth0: MAC: 5, PHY: 5, PBA No: 2050FF-0FF
[ 1.341918] e1000e 0000:06:00.1: Interrupt Throttling Rate (ints/sec) set to dynamic conservative mode
[ 1.382426] e1000e 0000:06:00.1 eth1: (PCI Express:2.5GT/s:Width x4) 00:30:48:7e:cb:cd
[ 1.382431] e1000e 0000:06:00.1 eth1: Intel(R) PRO/1000 Network Connection
[ 1.382511] e1000e 0000:06:00.1 eth1: MAC: 5, PHY: 5, PBA No: 2050FF-0FF
[ 1.384825] e1000e 0000:06:00.1 enp6s0f1: renamed from eth1
[ 1.399218] e1000e 0000:06:00.0 enp6s0f0: renamed from eth0
[ 52.221436] e1000e 0000:06:00.1 enp6s0f1: NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx
[ 52.221560] e1000e 0000:06:00.1 enp6s0f1: Link Speed was downgraded by SmartSpeed
[ 52.221563] e1000e 0000:06:00.1 enp6s0f1: 10/100 speed: disabling TSO
sudo lshw -C net产量
*-network:0
description: Ethernet interface
product: 80003ES2LAN Gigabit Ethernet Controller (Copper)
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:06:00.0
logical name: enp6s0f0
version: 01
serial: 00:30:48:7e:cb:cc
capacity: 1Gbit/s
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=5.15.0-70-lowlatency firmware=2.1-12 latency=0 link=no multicast=yes port=twisted pair
resources: irq:24 memory:d2220000-d223ffff memory:d2200000-d221ffff ioport:4000(size=32) memory:d2280000-d228ffff
*-network:1
description: Ethernet interface
product: 80003ES2LAN Gigabit Ethernet Controller (Copper)
vendor: Intel Corporation
physical id: 0.1
bus info: pci@0000:06:00.1
logical name: enp6s0f1
version: 01
serial: 00:30:48:7e:cb:cd
size: 100Mbit/s
capacity: 1Gbit/s
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=5.15.0-70-lowlatency duplex=full firmware=2.1-12 ip=192.168.0.25 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
resources: irq:26 memory:d2260000-d227ffff memory:d2240000-d225ffff ioport:4020(size=32) memory:d2290000-d229ffff