我在一台新机器上运行 14.04，无法获得稳定的有线互联网连接。
内核：3.13.0-32-通用
网卡：RTL8111/8168/8411
如果我启用 DHCP，它有时会在尝试 10-20 分钟后连接，然后当我尝试 ping 路由器时会出现大量数据包丢失。如果我手动为其指定 IP，它会立即连接，但在 ping 时仍会出现数据包丢失。
路由器和电缆已在另一台机器上测试过。我已经尝试用 r8168 驱动程序代替 r8169（结果相同）。
有人知道我应该尝试什么吗？
ifconfig
eth0 Link encap:Ethernet HWaddr d8:cb:8a:16:16:c7
inet addr:10.0.0.19 Bcast:10.0.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1153 errors:0 dropped:0 overruns:0 frame:0
TX packets:246 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:109082 (109.0 KB) TX bytes:40578 (40.5 KB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:32 errors:0 dropped:0 overruns:0 frame:0
TX packets:32 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2400 (2.4 KB) TX bytes:2400 (2.4 KB)
lspci -v
00:00.0 Host bridge: Intel Corporation 4th Gen Core Processor DRAM Controller (rev 06)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device 7817
Flags: bus master, fast devsel, latency 0
Capabilities: <access denied>
00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller (rev 06) (prog-if 00 [VGA controller])
Subsystem: Micro-Star International Co., Ltd. [MSI] Device 7817
Flags: bus master, fast devsel, latency 0, IRQ 45
Memory at f7800000 (64-bit, non-prefetchable) [size=4M]
Memory at e0000000 (64-bit, prefetchable) [size=256M]
I/O ports at f000 [size=64]
Expansion ROM at <unassigned> [disabled]
Capabilities: <access denied>
Kernel driver in use: i915
00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller (rev 06)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device 7817
Flags: bus master, fast devsel, latency 0, IRQ 46
Memory at f7e14000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
00:14.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB xHCI (rev 05) (prog-if 30 [XHCI])
Subsystem: Micro-Star International Co., Ltd. [MSI] Device 7817
Flags: bus master, medium devsel, latency 0, IRQ 40
Memory at f7e00000 (64-bit, non-prefetchable) [size=64K]
Capabilities: <access denied>
Kernel driver in use: xhci_hcd
00:16.0 Communication controller: Intel Corporation 8 Series/C220 Series Chipset Family MEI Controller #1 (rev 04)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device 7817
Flags: bus master, fast devsel, latency 0, IRQ 44
Memory at f7e1e000 (64-bit, non-prefetchable) [size=16]
Capabilities: <access denied>
Kernel driver in use: mei_me
00:1a.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #2 (rev 05) (prog-if 20 [EHCI])
Subsystem: Micro-Star International Co., Ltd. [MSI] Device 7817
Flags: bus master, medium devsel, latency 0, IRQ 16
Memory at f7e1c000 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
Kernel driver in use: ehci-pci
00:1b.0 Audio device: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller (rev 05)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device d817
Flags: bus master, fast devsel, latency 0, IRQ 47
Memory at f7e10000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
00:1c.0 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #1 (rev d5) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: 00002000-00002fff
Memory behind bridge: df200000-df3fffff
Prefetchable memory behind bridge: 00000000df400000-00000000df5fffff
Capabilities: <access denied>
Kernel driver in use: pcieport
00:1c.2 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #3 (rev d5) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
I/O behind bridge: 0000e000-0000efff
Memory behind bridge: f7d00000-f7dfffff
Prefetchable memory behind bridge: 00000000f0000000-00000000f00fffff
Capabilities: <access denied>
Kernel driver in use: pcieport
00:1c.5 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #6 (rev d5) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
Memory behind bridge: f7c00000-f7cfffff
Capabilities: <access denied>
Kernel driver in use: pcieport
00:1d.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #1 (rev 05) (prog-if 20 [EHCI])
Subsystem: Micro-Star International Co., Ltd. [MSI] Device 7817
Flags: bus master, medium devsel, latency 0, IRQ 23
Memory at f7e1b000 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
Kernel driver in use: ehci-pci
00:1f.0 ISA bridge: Intel Corporation C220 Series Chipset Family H81 Express LPC Controller (rev 05)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device 7817
Flags: bus master, medium devsel, latency 0
Capabilities: <access denied>
Kernel driver in use: lpc_ich
00:1f.2 SATA controller: Intel Corporation 8 Series/C220 Series Chipset Family 6-port SATA Controller 1 [AHCI mode] (rev 05) (prog-if 01 [AHCI 1.0])
Subsystem: Micro-Star International Co., Ltd. [MSI] Device 7817
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 42
I/O ports at f0b0 [size=8]
I/O ports at f0a0 [size=4]
I/O ports at f090 [size=8]
I/O ports at f080 [size=4]
I/O ports at f060 [size=32]
Memory at f7e1a000 (32-bit, non-prefetchable) [size=2K]
Capabilities: <access denied>
Kernel driver in use: ahci
00:1f.3 SMBus: Intel Corporation 8 Series/C220 Series Chipset Family SMBus Controller (rev 05)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device 7817
Flags: medium devsel, IRQ 3
Memory at f7e19000 (64-bit, non-prefetchable) [size=256]
I/O ports at f040 [size=32]
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 0c)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device 7817
Flags: bus master, fast devsel, latency 0, IRQ 43
I/O ports at e000 [size=256]
Memory at f7d00000 (64-bit, non-prefetchable) [size=4K]
Memory at f0000000 (64-bit, prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: r8169
03:00.0 USB controller: VIA Technologies, Inc. Device 3483 (rev 01) (prog-if 30 [XHCI])
Subsystem: Micro-Star International Co., Ltd. [MSI] Device 7817
Flags: bus master, fast devsel, latency 0, IRQ 41
Memory at f7c00000 (64-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Kernel driver in use: xhci_hcd
sudo lshw -numeric -C network
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10EC:8168]
vendor: Realtek Semiconductor Co., Ltd. [10EC]
physical id: 0
bus info: pci@0000:02:00.0
logical name: eth0
version: 0c
serial: d8:cb:8a:16:16:c7
size: 10Mbit/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=rtl8168g-2_0.0.1 02/06/13 ip=10.0.0.19 latency=0 link=yes multicast=yes port=MII speed=10Mbit/s
resources: irq:43 ioport:e000(size=256) memory:f7d00000-f7d00fff memory:f0000000-f0003fff