我的第二个以太网端口突然停止工作了。它们都是主板的一部分。
我可以在 bios 中看到这两个端口。它们正在工作，但到目前为止我只使用其中一个。/etc/network/interface已正确设置并更改了 eth0 和 eth1 之间的设置。
sudo modprobe tg3也没有什么帮助，（因为文档中说这是两个以太网端口/卡的模块。）
它是否无可救药了？是否已经变得糟糕？或者是否可以修复？
lshw -C network
*-network UNCLAIMED
description: Ethernet controller
product: NetXtreme BCM5721 Gigabit Ethernet PCI Express
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:03:00.0
version: 11
width: 64 bits
clock: 66MHz
capabilities: bus_master vga_palette cap_list
configuration: latency=0
resources: iomemory:ffffffff0-fffffffef
*-network
description: Ethernet interface
product: NetXtreme BCM5721 Gigabit Ethernet PCI Express
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:04:00.0
logical name: eth0
version: 11
serial: 00:1c:23:1c:af:8c
size: 100Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm vpd msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.134 duplex=full firmware=5721-v3.61, ASFIPMI v6.21 ip=***.***.***.*** latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
注意：我也尝试了实时 Ubuntu 14.04 CD，但遇到了同样的问题。
lspci -v
03:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5721 Gigabit Ethernet PCI Express (rev 11)
Subsystem: Dell PowerEdge 860
Flags: fast devsel, IRQ 16
Capabilities: [48] Power Management version 2
Capabilities: [50] Vital Product Data
Capabilities: [58] MSI: Enable- Count=1/8 Maskable- 64bit+
Capabilities: [d0] Express Endpoint, MSI 00
04:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5721 Gigabit Ethernet PCI Express (rev 11)
Subsystem: Dell PowerEdge 860
Flags: bus master, fast devsel, latency 0, IRQ 17
Memory at fe7f0000 (64-bit, non-prefetchable) [size=64K]
Expansion ROM at <ignored> [disabled]
Capabilities: [48] Power Management version 2
Capabilities: [50] Vital Product Data
Capabilities: [58] MSI: Enable- Count=1/8 Maskable- 64bit+
Capabilities: [d0] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [13c] Virtual Channel
Kernel driver in use: tg3