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有线互联网连接在重启 5 分钟后断开

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有线互联网连接在重启 5 分钟后断开

重启后大约 5 分钟有线互联网连接断开。运行sudo dhclient可恢复连接。恢复后，连接将一直正常，直到下次重启。

我认为问题出现在升级到 15.04 之后（但也可能是 15.10）。

在互联网连接丢失之前（重启后 5 分钟内）：

ifconfig -a
eth0      Link encap:Ethernet  HWaddr 9c:b6:54:a6:69:98  
          inet addr:192.168.51.181  Bcast:192.168.51.255  Mask:255.255.254.0
          inet6 addr: fe80::9eb6:54ff:fea6:6998/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:6763 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3805 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:3932488 (3.9 MB)  TX bytes:517066 (517.0 KB)
          Interrupt:20 Memory:ef100000-ef120000

丢失后（重启后 5 分钟以上）：

eth0      Link encap:Ethernet  HWaddr 9c:b6:54:a6:69:98  
          inet6 addr: fe80::9eb6:54ff:fea6:6998/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:61238 errors:0 dropped:0 overruns:0 frame:0
          TX packets:9149 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:11382757 (11.3 MB)  TX bytes:1442442 (1.4 MB)
          Interrupt:20 Memory:ef100000-ef120000

已恢复（之后sudo dhclient）：

eth0      Link encap:Ethernet  HWaddr 9c:b6:54:a6:69:98  
          inet addr:192.168.51.181  Bcast:192.168.51.255  Mask:255.255.254.0
          inet6 addr: fe80::9eb6:54ff:fea6:6998/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:69929 errors:0 dropped:0 overruns:0 frame:0
          TX packets:13905 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:17527607 (17.5 MB)  TX bytes:2203444 (2.2 MB)
          Interrupt:20 Memory:ef100000-ef120000

相关lspci -nnk输出：

00:19.0 Ethernet controller [0200]: Intel Corporation Ethernet Connection I217-LM [8086:153a] (rev 05)
        DeviceName:  Onboard LAN
        Subsystem: Hewlett-Packard Company Device [103c:1905]
        Kernel driver in use: e1000e

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