[悬而未决] deactivating device (reason 'managed')，貌似顽疾，症状内详

[vickycq]

没有改动任何配置文件，插上网线没反应，状似没插网线（另一台机器测试网线正常）

以下是症状：

1. 执行 grep -i eth /var/log/syslog | tail 输出

代码： 全选

Jun 23 20:02:54 simon-laptop NetworkManager[4902]: <info> (eth0): carrier is OFF
Jun 23 20:02:54 simon-laptop NetworkManager[4902]: <info> (eth0): new Ethernet device (driver: 'r8169' ifindex: 2)
Jun 23 20:02:54 simon-laptop NetworkManager[4902]: <info> (eth0): exported as /org/freedesktop/NetworkManager/Devices/0
Jun 23 20:02:54 simon-laptop NetworkManager[4902]: <info> (eth0): device state change: unmanaged -> unavailable (reason 'managed') [10 20 2]
Jun 23 20:02:54 simon-laptop NetworkManager[4902]: <info> (eth0): bringing up device.
Jun 23 20:02:55 simon-laptop kernel: [  306.477077] r8169 0000:04:00.2 eth0: rtl_phy_reset_cond == 1 (loop: 100, delay: 1).
Jun 23 20:02:55 simon-laptop NetworkManager[4902]: <info> (eth0): preparing device.
Jun 23 20:02:55 simon-laptop NetworkManager[4902]: <info> (eth0): deactivating device (reason 'managed') [2]
Jun 23 20:02:55 simon-laptop kernel: [  306.480997] r8169 0000:04:00.2 eth0: link down
Jun 23 20:02:55 simon-laptop kernel: [  306.481423] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready

关键在 (eth0): deactivating device (reason 'managed') 一句。

2. 执行 nm-tool ，eth0相关部分：

代码： 全选

- Device: eth0 -----------------------------------------------------------------
  Type:              Wired
  Driver:            r8169
  State:             unavailable
  Default:           no
  HW Address:        C8:60:00:B5:4E:35

  Capabilities:
    Carrier Detect:  yes

  Wired Properties
    Carrier:         off

2.5 执行sudo ethtools eth0，内容：

代码： 全选

Settings for eth0:
	Supported ports: [ TP MII ]
	Supported link modes:   10baseT/Half 10baseT/Full 
	                        100baseT/Half 100baseT/Full 
	                        1000baseT/Half 1000baseT/Full 
	Supported pause frame use: No
	Supports auto-negotiation: Yes
	Advertised link modes:  10baseT/Half 10baseT/Full 
	                        100baseT/Half 100baseT/Full 
	                        1000baseT/Half 1000baseT/Full 
	Advertised pause frame use: Symmetric Receive-only
	Advertised auto-negotiation: Yes
	Speed: 10Mb/s
	Duplex: Half
	Port: MII
	PHYAD: 0
	Transceiver: internal
	Auto-negotiation: on
	Supports Wake-on: pumbg
	Wake-on: g
	Current message level: 0x00000033 (51)
			       drv probe ifdown ifup
	Link detected: no

3. /etc/NetworkManager/NetworkManager.conf 内容：

代码： 全选

[main]
plugins=ifupdown,keyfile

no-auto-default=C8:60:00:B5:4E:35,

[ifupdown]
managed=false

4. 关闭network-manager服务，在/etc/network/interfaces中加入：

代码： 全选

auto eth0
iface eth0 inet static

然后sudo ifup eth0，拿不到DHCPOFFER：

代码： 全选

Listening on LPF/eth0/c8:60:00:b5:4e:35
Sending on   LPF/eth0/c8:60:00:b5:4e:35
Sending on   Socket/fallback
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 6
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 14
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 10
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 9
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 12
No DHCPOFFERS received.
No working leases in persistent database - sleeping.

=====================================

以上，貌似是顽疾，请大师给点思路，如何解决？

[vickycq]

解决了， 啥文件也没改，下了个ub14.04 iso做成live usb，u盘启动进live系统，插网线一看，正常。
再重启，进原系统，也正常了

eth0好像被“惊醒”了一样。

总之，奇怪。

[vickycq]

问题又出现了，怀疑是r8169驱动不合适。

俺的笔记本ethernet接口没有指示灯，估计有灯在这种情况下也不会亮。

准备尝试自行编译r8168驱动，代替r8169。

[XYZZYX]

兄弟,我也遇到这个问题了,时好时不好的,有解决方法吗
我试过8168的驱动也有类似问题

[vickycq]

兄弟,我也遇到这个问题了,时好时不好的,有解决方法吗
我试过8168的驱动也有类似问题

目前没有。最近只有无线网，所以这个问题淡出了。有进展会随时跟你讨论。

[vickycq]

问题又出现了：
viewtopic.php?f=116&t=471648