我的笔记本电脑（Lenovo G-50-80）通过以太网可以正常连接到互联网，但由于 VMware Player 冻结，它冻结了 10 多分钟，我不得不长按电源按钮将其关闭。
但再次打开电脑后，我只能通过无线连接使用互联网，因此才会提出这个问题。
以下是一些我认为可能有帮助的必要配置文件和命令的输出：
/etc/network/interfaces：
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
/etc/NetworkManager/NetworkManager.conf：
[main]
plugins=ifupdown,keyfile,ofono
#dns=dnsmasq
[ifupdown]
managed=false
/etc/resolv.conf：
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 192.168.0.1
nameserver 192.168.1.1
search xxx.xx.xx
ip link：
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000
link/ether 50:7b:9d:12:a4:30 brd ff:ff:ff:ff:ff:ff
3: wlp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DORMANT group default qlen 1000
link/ether e4:f8:9c:d7:9b:41 brd ff:ff:ff:ff:ff:ff
4: vmnet1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN mode DEFAULT group default qlen 1000
link/ether 00:50:56:c0:00:01 brd ff:ff:ff:ff:ff:ff
5: vmnet8: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN mode DEFAULT group default qlen 1000
link/ether 00:50:56:c0:00:08 brd ff:ff:ff:ff:ff:ff
我syslog通过运行命令查看了文件tail -f /var/log/syslog，以下是输出...
连接到无线时：
Apr 12 16:43:47 Lenovo-G50-80 systemd-timesyncd[781]: Timed out waiting for reply from 91.189.89.198:123 (ntp.ubuntu.com).
Apr 12 16:45:01 Lenovo-G50-80 CRON[4015]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Apr 12 16:46:05 Lenovo-G50-80 systemd-timesyncd[781]: Timed out waiting for reply from 91.189.91.157:123 (ntp.ubuntu.com).
Apr 12 16:46:16 Lenovo-G50-80 systemd-timesyncd[781]: Timed out waiting for reply from 91.189.89.198:123 (ntp.ubuntu.com).
Apr 12 16:46:26 Lenovo-G50-80 systemd-timesyncd[781]: Timed out waiting for reply from 91.189.94.4:123 (ntp.ubuntu.com).
Apr 12 16:46:36 Lenovo-G50-80 systemd-timesyncd[781]: Timed out waiting for reply from 91.189.89.199:123 (ntp.ubuntu.com).
Apr 12 16:51:03 Lenovo-G50-80 systemd-timesyncd[781]: Timed out waiting for reply from 91.189.89.198:123 (ntp.ubuntu.com).
Apr 12 16:51:13 Lenovo-G50-80 systemd-timesyncd[781]: Timed out waiting for reply from 91.189.91.157:123 (ntp.ubuntu.com).
Apr 12 16:51:23 Lenovo-G50-80 systemd-timesyncd[781]: Timed out waiting for reply from 91.189.89.199:123 (ntp.ubuntu.com).
Apr 12 16:51:33 Lenovo-G50-80 systemd-timesyncd[781]: Timed out waiting for reply from 91.189.94.4:123 (ntp.ubuntu.com).
当我尝试切换到以太网时：
Apr 12 16:52:05 Lenovo-G50-80 NetworkManager[993]: <info> [1523541125.2170] device (enp2s0): Activation: starting connection 'Auto Ethernet' (308a058b-d505-4b7d-911f-06e133a924ec)
Apr 12 16:52:05 Lenovo-G50-80 NetworkManager[993]: <info> [1523541125.2172] audit: op="connection-activate" uuid="308a058b-d505-4b7d-911f-06e133a924ec" name="Auto Ethernet" pid=1761 uid=1000 result="success"
Apr 12 16:52:05 Lenovo-G50-80 NetworkManager[993]: <info> [1523541125.2174] device (enp2s0): state change: disconnected -> prepare (reason 'none') [30 40 0]
Apr 12 16:52:05 Lenovo-G50-80 NetworkManager[993]: <info> [1523541125.2201] device (enp2s0): state change: prepare -> config (reason 'none') [40 50 0]
Apr 12 16:52:05 Lenovo-G50-80 NetworkManager[993]: <info> [1523541125.2210] device (enp2s0): state change: config -> ip-config (reason 'none') [50 70 0]
Apr 12 16:52:05 Lenovo-G50-80 NetworkManager[993]: <info> [1523541125.2216] dhcp4 (enp2s0): activation: beginning transaction (timeout in 45 seconds)
Apr 12 16:52:05 Lenovo-G50-80 NetworkManager[993]: <info> [1523541125.2238] dhcp4 (enp2s0): dhclient started with pid 4231
Apr 12 16:52:05 Lenovo-G50-80 vmnet-natd: RTM_NEWLINK: name:enp2s0 index:2 flags:0x00011043
Apr 12 16:52:05 Lenovo-G50-80 vmnetBridge: RTM_NEWLINK: name:enp2s0 index:2 flags:0x00011043
Apr 12 16:52:05 Lenovo-G50-80 dhclient[4231]: DHCPREQUEST of 192.168.0.18 on enp2s0 to 255.255.255.255 port 67 (xid=0x269ab741)
Apr 12 16:52:05 Lenovo-G50-80 dhclient[4231]: DHCPNAK from 10.103.0.56 (xid=0x41b79a26)
Apr 12 16:52:05 Lenovo-G50-80 NetworkManager[993]: <info> [1523541125.2634] dhcp4 (enp2s0): state changed unknown -> expire
Apr 12 16:52:05 Lenovo-G50-80 NetworkManager[993]: <info> [1523541125.2737] dhcp4 (enp2s0): state changed expire -> unknown
Apr 12 16:52:05 Lenovo-G50-80 dhclient[4231]: DHCPDISCOVER on enp2s0 to 255.255.255.255 port 67 interval 3 (xid=0x91220402)
Apr 12 16:52:05 Lenovo-G50-80 dhclient[4231]: DHCPREQUEST of 192.168.0.18 on enp2s0 to 255.255.255.255 port 67 (xid=0x2042291)
Apr 12 16:52:05 Lenovo-G50-80 dhclient[4231]: DHCPOFFER of 192.168.0.18 from 192.168.0.1
Apr 12 16:52:05 Lenovo-G50-80 dhclient[4231]: DHCPACK of 192.168.0.18 from 192.168.0.1
Apr 12 16:52:05 Lenovo-G50-80 NetworkManager[993]: <info> [1523541125.3716] address 192.168.0.18
Apr 12 16:52:05 Lenovo-G50-80 NetworkManager[993]: <info> [1523541125.3716] plen 24 (255.255.255.0)
Apr 12 16:52:05 Lenovo-G50-80 NetworkManager[993]: <info> [1523541125.3716] gateway 192.168.0.1
Apr 12 16:52:05 Lenovo-G50-80 NetworkManager[993]: <info> [1523541125.3716] server identifier 192.168.0.1
Apr 12 16:52:05 Lenovo-G50-80 NetworkManager[993]: <info> [1523541125.3716] lease time 86400
Apr 12 16:52:05 Lenovo-G50-80 NetworkManager[993]: <info> [1523541125.3716] nameserver '192.168.0.1'
Apr 12 16:52:05 Lenovo-G50-80 NetworkManager[993]: <info> [1523541125.3717] dhcp4 (enp2s0): state changed unknown -> bound
Apr 12 16:52:05 Lenovo-G50-80 vmnet-natd: RTM_NEWADDR: index:2, addr:192.168.0.18
Apr 12 16:52:05 Lenovo-G50-80 avahi-daemon[903]: Joining mDNS multicast group on interface enp2s0.IPv4 with address 192.168.0.18.
Apr 12 16:52:05 Lenovo-G50-80 avahi-daemon[903]: New relevant interface enp2s0.IPv4 for mDNS.
Apr 12 16:52:05 Lenovo-G50-80 avahi-daemon[903]: Registering new address record for 192.168.0.18 on enp2s0.IPv4.
Apr 12 16:52:05 Lenovo-G50-80 vmnet-natd: RTM_NEWROUTE: index:2
Apr 12 16:52:05 Lenovo-G50-80 vmnetBridge: RTM_NEWROUTE: index:2
Apr 12 16:52:05 Lenovo-G50-80 NetworkManager[993]: <info> [1523541125.3741] device (enp2s0): state change: ip-config -> ip-check (reason 'none') [70 80 0]
Apr 12 16:52:05 Lenovo-G50-80 vmnetBridge: Stopped bridge wlp3s0 to virtual network 0.
Apr 12 16:52:05 Lenovo-G50-80 vmnetBridge: Started bridge enp2s0 to virtual network 0.
Apr 12 16:52:05 Lenovo-G50-80 NetworkManager[993]: <info> [1523541125.3754] device (enp2s0): state change: ip-check -> secondaries (reason 'none') [80 90 0]
Apr 12 16:52:05 Lenovo-G50-80 kernel: [ 878.873139] bridge-wlp3s0: disabling the bridge on dev down
Apr 12 16:52:05 Lenovo-G50-80 kernel: [ 878.873175] bridge-wlp3s0: down
Apr 12 16:52:05 Lenovo-G50-80 kernel: [ 878.873189] bridge-wlp3s0: detached
Apr 12 16:52:05 Lenovo-G50-80 kernel: [ 878.873226] /dev/vmnet: open called by PID 2129 (vmnet-bridge)
Apr 12 16:52:05 Lenovo-G50-80 kernel: [ 878.873236] /dev/vmnet: hub 0 does not exist, allocating memory.
Apr 12 16:52:05 Lenovo-G50-80 kernel: [ 878.873273] /dev/vmnet: port on hub 0 successfully opened
Apr 12 16:52:05 Lenovo-G50-80 kernel: [ 878.873285] bridge-enp2s0: up
Apr 12 16:52:05 Lenovo-G50-80 kernel: [ 878.873289] bridge-enp2s0: attached
Apr 12 16:52:05 Lenovo-G50-80 NetworkManager[993]: <info> [1523541125.3779] device (enp2s0): state change: secondaries -> activated (reason 'none') [90 100 0]
Apr 12 16:52:05 Lenovo-G50-80 NetworkManager[993]: <info> [1523541125.4416] manager: NetworkManager state is now CONNECTED_LOCAL
Apr 12 16:52:05 Lenovo-G50-80 NetworkManager[993]: <info> [1523541125.4418] manager: NetworkManager state is now CONNECTED_GLOBAL
Apr 12 16:52:05 Lenovo-G50-80 NetworkManager[993]: <info> [1523541125.4420] policy: set 'Auto Ethernet' (enp2s0) as default for IPv4 routing and DNS
Apr 12 16:52:05 Lenovo-G50-80 NetworkManager[993]: <info> [1523541125.4421] dns-mgr: Writing DNS information to /sbin/resolvconf
Apr 12 16:52:05 Lenovo-G50-80 dhclient[4231]: bound to 192.168.0.18 -- renewal in 39410 seconds.
Apr 12 16:52:05 Lenovo-G50-80 kernel: [ 879.071512] userif-3: sent link down event.
Apr 12 16:52:05 Lenovo-G50-80 kernel: [ 879.071516] userif-3: sent link up event.
Apr 12 16:52:05 Lenovo-G50-80 org.gtk.vfs.Daemon[1457]: ** (process:2337): WARNING **: Couldn't create directory monitor on smb://x-gnome-default-workgroup/. Error: Operation not supported by backend
Apr 12 16:52:05 Lenovo-G50-80 whoopsie[1957]: [16:52:05] offline
Apr 12 16:52:06 Lenovo-G50-80 NetworkManager[993]: <info> [1523541126.8824] device (enp2s0): Activation: successful, device activated.
Apr 12 16:52:06 Lenovo-G50-80 dbus[933]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service'
Apr 12 16:52:06 Lenovo-G50-80 whoopsie[1957]: [16:52:06] The default IPv4 route is: /org/freedesktop/NetworkManager/ActiveConnection/2
Apr 12 16:52:06 Lenovo-G50-80 whoopsie[1957]: [16:52:06] Not a paid data plan: /org/freedesktop/NetworkManager/ActiveConnection/2
Apr 12 16:52:06 Lenovo-G50-80 whoopsie[1957]: [16:52:06] Found usable connection: /org/freedesktop/NetworkManager/ActiveConnection/2
Apr 12 16:52:06 Lenovo-G50-80 whoopsie[1957]: [16:52:06] online
Apr 12 16:52:06 Lenovo-G50-80 systemd[1]: Starting Network Manager Script Dispatcher Service...
Apr 12 16:52:06 Lenovo-G50-80 dbus[933]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Apr 12 16:52:06 Lenovo-G50-80 systemd[1]: Started Network Manager Script Dispatcher Service.
Apr 12 16:52:06 Lenovo-G50-80 nm-dispatcher: req:1 'up' [enp2s0]: new request (1 scripts)
Apr 12 16:52:06 Lenovo-G50-80 nm-dispatcher: req:1 'up' [enp2s0]: start running ordered scripts...
Apr 12 16:52:07 Lenovo-G50-80 avahi-daemon[903]: Joining mDNS multicast group on interface enp2s0.IPv6 with address fe80::ebba:fab2:4727:42aa.
Apr 12 16:52:07 Lenovo-G50-80 avahi-daemon[903]: New relevant interface enp2s0.IPv6 for mDNS.
Apr 12 16:52:07 Lenovo-G50-80 avahi-daemon[903]: Registering new address record for fe80::ebba:fab2:4727:42aa on enp2s0.*.
这可能是什么问题？我该如何解决？