系统环境: OS: Ubuntu 16.04 LTS 64位 之前也遇到过这样的问题,使用有线网络上网时,有时会出现断网的现象,不过一般重新启用网络后就可以用了。但是这次断网后,却怎么也连不上网了。后来上网查了很久,终于找到原因了,是网卡的驱动问题导致的。查找问题 首先,查看系统 Log:
1 2 3 4 5 6 NetworkManager[1002]: <info> [1494831368.7343] device (enp3s0): state change: disconnected -> unmanaged (reason 'sleeping' ) [30 10 37] NetworkManager[1002]: <info> [1494831368.7589] device (enp3s0): link disconnected NetworkManager[1002]: <info> [1494831376.6517] device (enp3s0): state change: unmanaged -> unavailable (reason 'managed' ) [10 20 2] kernel: [ 602.158370] IPv6: ADDRCONF(NETDEV_UP): enp3s0: link is not ready kernel: [ 602.286519] r8169 0000:03:00.0 enp3s0: link down
之后执行如下命令查看系统内核版本:
1 2 Linux ubuntupc 4.4.0-77-generic
然后查看网卡及使用的驱动信息:
1 2 3 4 5 6 7 ...... ...... 03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 06) Subsystem: Dell RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [1028:0585] Kernel driver in use: r8169 Kernel modules: r8169
注意 : 以上信息表明,网卡为 Dell RTL8111/8168/8411,但是使用的驱动却是 “r8169”,所以这就是问题所在。Tips: 也可以执行下面的命令查看网卡及版本信息:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 *-network description: Ethernet interface product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:03:00.0 logical name: enp3s0 version: 06 serial: xx:bb:cc:yy:dd:zz size: 100Mbit/s capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl8168e-3_0.0.4 03/27/12 ip=192.168.21.189 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s resources: irq:26 ioport:d000(size=256) memory:f2104000-f2104fff memory:f2100000-f2103fff ...... ......
其中的 driver=r8169 driverversion=2.3LK-NAPI 为网卡的驱动版本。驱动下载 之后在官网下载对应内核版本的驱动程序:http://www.realtek.com.tw/downloads/downloadsView.aspx?Langid=1&PNid=13&PFid=5&Level=5&Conn=4&DownTypeID=3&GetDown=false#2 下载 Unix (Linux) 中的 LINUX driver for kernel up to 4.7 驱动文件。驱动安装
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Check old driver and unload it. rmmod r8169 Build the module and install At main.c:222: - SSL error:02001002:system library:fopen:No such file or directory: bss_file.c:175 - SSL error:2006D080:BIO routines:BIO_new_file:no such file: bss_file.c:182 sign-file: certs/signing_key.pem: No such file or directory Backup r8169.ko rename r8169.ko to r8169.bak DEPMOD 4.4.0-77-generic load module r8168 Updating initramfs. Please wait . update-initramfs: Generating /boot/initrd.img-4.4.0-77-generic Completed.
之后重启电脑(最好再重新启用下网络连接)即可。 参考文献: