与网络管理器的持久3G连接失败

Question

我使用网络管理器在远程设备上维护一个持久的3G连接。但是，通常情况下，链接会失败，然后不会重新启动。我设法在我的syslog中发现了这种情况，但老实说，我不太清楚我在看什么。机器似乎认为该设备已被拔出，但没有相应的日志条目，因为它实际上已被拔出。

有人会介意看看下面的syslog片段并引导我朝正确的方向前进吗？

Oct 13 22:25:26 tracker pppd[1091]: LCP terminated by peer
Oct 13 22:25:26 tracker pppd[1091]: Connect time 206.7 minutes.
Oct 13 22:25:26 tracker pppd[1091]: Sent 203306 bytes, received 182777 bytes.
Oct 13 22:25:26 tracker pppd[1091]: Modem hangup
Oct 13 22:25:26 tracker pppd[1091]: Connection terminated.
Oct 13 22:25:26 tracker NetworkManager[333]: <info> (ttyUSB1): device state change: 8 -> 9 (reason 13)
Oct 13 22:25:26 tracker NetworkManager[333]: <info> Unmanaged Device found; state CONNECTED forced. (see http://bugs.launchpad.net/bugs/191889)
Oct 13 22:25:26 tracker NetworkManager[333]: <warn> Activation (ttyUSB1) failed.
Oct 13 22:25:26 tracker modem-manager[337]: <info>  (ttyUSB1) closing serial port...
Oct 13 22:25:26 tracker NetworkManager[333]: <info> (ttyUSB1): device state change: 9 -> 3 (reason 0)
Oct 13 22:25:26 tracker NetworkManager[333]: <info> (ttyUSB1): deactivating device (reason: 0).
Oct 13 22:25:26 tracker kernel: [12441.840088] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6
Oct 13 22:25:26 tracker kernel: [12441.846744] ata1.00: BMDMA stat 0x66
Oct 13 22:25:26 tracker kernel: [12441.850446] ata1.00: failed command: WRITE DMA
Oct 13 22:25:26 tracker kernel: [12441.855020] ata1.00: cmd ca/00:02:c4:fb:5b/00:00:00:00:00/e0 tag 0 dma 1024 out
Oct 13 22:25:26 tracker kernel: [12441.855024]          res 51/84:00:c4:fb:5b/00:00:00:00:00/e0 Emask 0x30 (host bus error)
Oct 13 22:25:26 tracker kernel: [12441.870623] ata1.00: status: { DRDY ERR }
Oct 13 22:25:26 tracker kernel: [12441.874708] ata1.00: error: { ICRC ABRT }
Oct 13 22:25:26 tracker kernel: [12441.878820] ata1: soft resetting link
Oct 13 22:25:26 tracker modem-manager[337]: <info>  (ttyUSB1) serial port closed
Oct 13 22:25:26 tracker modem-manager[337]: <info>  Modem /org/freedesktop/ModemManager/Modems/0: state changed (connected -> disconnecting)
Oct 13 22:25:26 tracker modem-manager[337]: <info>  Modem /org/freedesktop/ModemManager/Modems/0: state changed (disconnecting -> connected)
Oct 13 22:25:26 tracker NetworkManager[333]: <warn> could not read ppp stats: No such device
Oct 13 22:25:26 tracker pppd[1091]: Exit.
Oct 13 22:25:26 tracker NetworkManager[333]: <info> Unmanaged Device found; state CONNECTED forced. (see http://bugs.launchpad.net/bugs/191889)
Oct 13 22:25:26 tracker NetworkManager[333]:    SCPlugin-Ifupdown: devices removed (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
Oct 13 22:25:26 tracker NetworkManager[333]: <info> disconnect failed: (32) The serial port is not open.
Oct 13 22:25:27 tracker kernel: [12442.048218] ata1.00: configured for UDMA/100
Oct 13 22:25:27 tracker kernel: [12442.048241] ata1: EH complete
Oct 13 22:25:27 tracker kernel: [12442.050941] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6
Oct 13 22:25:27 tracker kernel: [12442.057483] ata1.00: BMDMA stat 0x66
Oct 13 22:25:27 tracker kernel: [12442.061153] ata1.00: failed command: WRITE DMA
Oct 13 22:25:27 tracker kernel: [12442.065696] ata1.00: cmd ca/00:02:c4:fb:5b/00:00:00:00:00/e0 tag 0 dma 1024 out
Oct 13 22:25:27 tracker kernel: [12442.065699]          res 51/84:00:c4:fb:5b/00:00:00:00:00/e0 Emask 0x30 (host bus error)
Oct 13 22:25:27 tracker kernel: [12442.081273] ata1.00: status: { DRDY ERR }
Oct 13 22:25:27 tracker kernel: [12442.085366] ata1.00: error: { ICRC ABRT }
Oct 13 22:25:27 tracker kernel: [12442.089488] ata1: soft resetting link
Oct 13 22:25:27 tracker kernel: [12442.260206] ata1.00: configured for UDMA/100
Oct 13 22:25:27 tracker kernel: [12442.260226] ata1: EH complete
Oct 13 22:25:27 tracker kernel: [12442.268296] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6
Oct 13 22:25:27 tracker kernel: [12442.274829] ata1.00: BMDMA stat 0x66
Oct 13 22:25:27 tracker kernel: [12442.278480] ata1.00: failed command: WRITE DMA
Oct 13 22:25:27 tracker kernel: [12442.283022] ata1.00: cmd ca/00:02:c4:fb:5b/00:00:00:00:00/e0 tag 0 dma 1024 out
Oct 13 22:25:27 tracker kernel: [12442.283026]          res 51/84:00:c4:fb:5b/00:00:00:00:00/e0 Emask 0x30 (host bus error)
Oct 13 22:25:27 tracker kernel: [12442.298605] ata1.00: status: { DRDY ERR }
Oct 13 22:25:27 tracker kernel: [12442.302693] ata1.00: error: { ICRC ABRT }
Oct 13 22:25:27 tracker kernel: [12442.306763] ata1: soft resetting link
Oct 13 22:25:27 tracker kernel: [12442.476225] ata1.00: configured for UDMA/100
Oct 13 22:25:27 tracker kernel: [12442.476248] ata1: EH complete
Oct 13 22:25:29 tracker NetworkManager[333]: <info> Activation (ttyUSB1) starting connection 'cdma'
Oct 13 22:25:29 tracker NetworkManager[333]: <info> (ttyUSB1): device state change: 3 -> 4 (reason 0)
Oct 13 22:25:29 tracker NetworkManager[333]: <info> Unmanaged Device found; state CONNECTED forced. (see http://bugs.launchpad.net/bugs/191889)
Oct 13 22:25:29 tracker NetworkManager[333]: <info> Activation (ttyUSB1) Stage 1 of 5 (Device Prepare) scheduled...
Oct 13 22:25:29 tracker NetworkManager[333]: <info> Activation (ttyUSB1) Stage 1 of 5 (Device Prepare) started...
Oct 13 22:25:29 tracker NetworkManager[333]: <info> Activation (ttyUSB1) Stage 1 of 5 (Device Prepare) complete.
Oct 13 22:25:30 tracker modem-manager[337]: <info>  Modem /org/freedesktop/ModemManager/Modems/0: state changed (connected -> registered)
Oct 13 22:25:30 tracker modem-manager[337]: <info>  Modem /org/freedesktop/ModemManager/Modems/0: state changed (registered -> connecting)
Oct 13 22:25:30 tracker modem-manager[337]: <info>  Modem /org/freedesktop/ModemManager/Modems/0: state changed (connecting -> registered)
Oct 13 22:25:30 tracker NetworkManager[333]: <warn> CDMA connection failed: (32) Sending command failed: device is not enabled
Oct 13 22:25:30 tracker NetworkManager[333]: <info> (ttyUSB1): device state change: 4 -> 9 (reason 0)
Oct 13 22:25:30 tracker NetworkManager[333]: <info> Unmanaged Device found; state CONNECTED forced. (see http://bugs.launchpad.net/bugs/191889)
Oct 13 22:25:30 tracker NetworkManager[333]: <info> Marking connection 'cdma' invalid.
Oct 13 22:25:30 tracker NetworkManager[333]: <warn> Activation (ttyUSB1) failed.
Oct 13 22:25:30 tracker NetworkManager[333]: <info> (ttyUSB1): device state change: 9 -> 3 (reason 0)
Oct 13 22:25:30 tracker NetworkManager[333]: <info> (ttyUSB1): deactivating device (reason: 0).
Oct 13 22:25:30 tracker NetworkManager[333]: <info> Unmanaged Device found; state CONNECTED forced. (see http://bugs.launchpad.net/bugs/191889)

Answer 1

不幸的是，这正是一些3G网络的工作方式。如果串行端口已关闭，则基本上需要将它们重新设置为poweron模式。这可能是可行的，使用“启用移动宽带”选项中的nm-applet，通过取消选择和选择它。否则，可能需要再次对其进行模式转换，在这种情况下，将其从计算机上断开并再次插入可能很简单(但如果您真的想手动切换它，则需要在启用/etc/usb_modeswitch.conf之后，通过/var/log/usb_modeswitch.log了解哪些参数被udev传递给usb-modeswitch.conf)。

作为一种可能的解决办法，您可以在/etc/ppp/选项中设置持久化(在建立连接时仍然应该读取这些选项)。这可能有助于保持PPP并避免关闭调制解调器的端口。

Answer 2

这是否与下列任何一项有关：

• https://bugs.launchpad.net/ubuntu/+source/linux/+bug/789508
• https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/566812

？

Answer 3

你的日志开始几行太晚了。我认为重要的几行是以前的

Oct 13 22:25:26 tracker pppd[1091]: LCP terminated by peer

它显示PPP守护进程告诉您，“另一端”终止了连接。

我还担心您的ATA.1磁盘错误-您有备份吗？