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1000baseT/Full 支持并宣传但不起作用

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1000baseT/Full 支持并宣传但不起作用

我看到有一个类似的问题已经关闭。更换电缆后问题解决了。我遇到了这个问题，我怀疑这不是硬件问题。这是我的 sudo lshw -C network：

*-network                 
   description: Ethernet interface
   product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
   vendor: Realtek Semiconductor Co., Ltd.
   physical id: 0
   bus info: pci@0000:07:00.0
   logical name: enp7s0
   version: 07
   serial: b8:ca:3a:ca:44:6d
   size: 100Mbit/s
   capacity: 1Gbit/s
   width: 64 bits
   clock: 33MHz
   capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
   configuration: autonegotiation=on broadcast=yes driver=r8168 driverversion=8.045.08-NAPI duplex=full ip=192.168.1.128 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
   resources: irq:27 ioport:2000(size=256) memory:d1404000-d1404fff memory:d1400000-d1403fff

这是 sudo ethtool enp7s0：

Settings for enp7s0:
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: 0
Transceiver: internal
Auto-negotiation: on
MDI-X: Unknown
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000033 (51)
               drv probe ifdown ifup
Link detected: yes

我只能认为这不是硬件问题，因为我最近曾经运行过它（同一台笔记本电脑运行 Ubuntu 18.04.2 LTS，同一台路由器和同一根电缆），这是 sudo ethtool enps70：

Settings for enp7s0:
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: 1000Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
MDI-X: Unknown
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000033 (51)
               drv probe ifdown ifup
Link detected: yes

但现在我无法将速度设置为 1000

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