Ubuntu14.04以太网连接问题

Question

我刚刚从12.04升级到14.04，当我断开以太网电缆或挂起时，网络管理器继续尝试4-5次连接失败，然后最终成功。如果重新启动连接，则连接正常，但如果再次断开连接，问题将再次出现。

这是dmesg的输出：

[ 1234.523258] PM: Syncing filesystems ... done.
[ 1234.743865] PM: Preparing system for mem sleep
[ 1234.744109] Freezing user space processes ... (elapsed 0.002 seconds) done.
[ 1234.746257] Freezing remaining freezable tasks ... (elapsed 1.504 seconds) done.
[ 1236.250482] PM: Entering mem sleep
[ 1236.250514] Suspending console(s) (use no_console_suspend to debug)
[ 1236.251018] sd 0:0:0:0: [sda] Synchronizing SCSI cache
[ 1236.251343] sd 0:0:0:0: [sda] Stopping disk
[ 1236.812155] PM: suspend of devices complete after 561.290 msecs
[ 1236.812530] PM: late suspend of devices complete after 0.371 msecs
[ 1236.828483] ehci-pci 0000:00:04.1: System wakeup enabled by ACPI
[ 1236.844052] ohci-pci 0000:00:04.0: System wakeup enabled by ACPI
[ 1236.860284] PM: noirq suspend of devices complete after 47.750 msecs
[ 1236.860415] ACPI: Preparing to enter system sleep state S3
[ 1236.861876] PM: Saving platform NVS memory
[ 1236.862162] Disabling non-boot CPUs ...
[ 1236.964057] smpboot: CPU 1 is now offline
[ 1236.964265] ACPI: Low-level resume complete
[ 1236.964265] PM: Restoring platform NVS memory
[ 1236.964265] Enabling non-boot CPUs ...
[ 1236.964265] x86: Booting SMP configuration:
[ 1236.964265] smpboot: Booting Node 0 Processor 1 APIC 0x1
[ 1236.863533] Initializing CPU#1
[ 1236.976181] CPU1 is up
[ 1236.977216] ACPI: Waking up from system sleep state S3
[ 1237.556134] ohci-pci 0000:00:04.0: System wakeup disabled by ACPI
[ 1237.572108] ehci-pci 0000:00:04.1: System wakeup disabled by ACPI
[ 1237.620274] PM: noirq resume of devices complete after 79.948 msecs
[ 1237.620451] PM: early resume of devices complete after 0.147 msecs
[ 1237.940033] ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[ 1238.012503] ata2.00: configured for UDMA/100
[ 1239.452092] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 1239.456315] ata1.00: configured for UDMA/133
[ 1239.456825] sd 0:0:0:0: [sda] Starting disk
[ 1239.486112] PM: resume of devices complete after 1865.656 msecs
[ 1239.486478] PM: Finishing wakeup.
[ 1239.486481] Restarting tasks ... done.
[ 1239.503830] video LNXVIDEO:00: Restoring backlight state
[ 1239.691997] r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded
[ 1239.692095] r8169 0000:03:00.0: can't disable ASPM; OS doesn't have ASPM control
[ 1239.692359] r8169 0000:03:00.0: irq 41 for MSI/MSI-X
[ 1239.735826] r8169 0000:03:00.0 eth0: RTL8168b/8111b at 0xf842a000, e0:cb:4e:2f:c4:f7, XID 18000000 IRQ 41
[ 1239.735831] r8169 0000:03:00.0 eth0: jumbo features [frames: 4080 bytes, tx checksumming: ko]
[ 1241.841344] r8169 0000:03:00.0 eth0: link down
[ 1241.841364] r8169 0000:03:00.0 eth0: link down
[ 1241.841639] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 1243.636825] r8169 0000:03:00.0 eth0: link up
[ 1243.636843] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 1244.281364] r8169 0000:03:00.0 eth0: link down
[ 1244.281395] r8169 0000:03:00.0 eth0: link down
[ 1244.281616] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 1244.561344] r8169 0000:03:00.0 eth0: link down
[ 1244.561442] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 1246.377956] r8169 0000:03:00.0 eth0: link up
[ 1246.377971] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 1251.433358] r8169 0000:03:00.0 eth0: link down
[ 1251.433411] r8169 0000:03:00.0 eth0: link down
[ 1251.433481] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 1253.072957] r8169 0000:03:00.0 eth0: link up
[ 1253.072974] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 3498.716445] r8169 0000:03:00.0 eth0: link down
[ 3501.273340] r8169 0000:03:00.0 eth0: link down
[ 3501.273452] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 3501.673354] r8169 0000:03:00.0 eth0: link down
[ 3501.673419] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 3503.203193] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 3523.370577] r8169 0000:03:00.0 eth0: link up
[ 3523.370595] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready

Answer 1

来自：http://www.techytalk.info/ubuntu-fix-network-stopped-working-after-resume-from-sleep/

我有一个Realtek14.04不喜欢挂起/恢复进程的realtek r8169 NIC。

sudo gedit /etc/pm/config.d/unload_modules

(如果不存在，则创建它)，然后添加：

SUSPEND_MODULES="$SUSPEND_MODULES r8169"

重新启动你的机器。

从下一次引导开始，当您挂起然后回到您的会话时，只需在右上角的下拉列表中选择要从network激活的连接。

干杯!

MM

顺便说一下，我有这个

04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 10)

我的戴尔Inspiron 7559 (7000系列).