I installed windows 10 trial version after Ubuntu 16.04, and my wifi and ethernet for Ubuntu stopped working. My Ubuntu used to have some wifi connection issues ( slow speed or cannot connect, which happens to all ubuntu systems, so that is another problem.), but usually ethernet works. The ethernet or wifi for windows 10 works fine. I suspect there is a driver conflict but I don't know what to do.
This answerhere suggest a solution for ethernet, but I couldn't find similar solution for wifi connections.
Ubuntu is also known for not being well-supported by most wifi chipset manufacturers, so I tried three wifi adapters rtl8192cu, TL-WN722N_V3(rtl8188eu), and TP-Link TL-WR710N (Atheros AR9331). Network Manager shows all of them can detect wifi signals from different routers, but they fail to connect to internet when I use browsers or ping command.
I can connect to the router 192.168.1.1.
I can't connect to https://tplinklogin.net, or 192.168.1.254, which is the admin page for setting the wifi adaptor TL-WR710N.
I can't connect to internet via either usb tethering or wifi hotspot to my phone data plan.
lshw -C network
WARNING: you should run this program as super-user.
*-network
description: Ethernet interface
product: Ethernet Connection (2) I219-V
vendor: Intel Corporation
physical id: 1f.6
bus info: pci@0000:00:1f.6
logical name: enp0s31f6
version: 00
serial: 30:9c:23:3c:a9:be
size: 100Mbit/s
capacity: 1Gbit/s
width: 32 bits
clock: 33MHz
capabilities: bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=3.2.6-k duplex=full firmware=0.8-4 ip=192.168.1.29 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
resources: irq:130 memory:df200000-df21ffff
*-network:0
description: Wireless interface
physical id: 1
bus info: usb@1:7
logical name: wlxe84e0624c146
serial: e8:4e:06:24:c1:46
capabilities: ethernet physical wireless
configuration: broadcast=yes driver=rtl8192cu multicast=yes wireless=unassociated
*-network:1
description: Wireless interface
physical id: 2
bus info: usb@1:14
logical name: wlx503eaa705446
serial: 50:3e:aa:70:54:46
capabilities: ethernet physical wireless
configuration: broadcast=yes driver=rtl8188eu ip=192.168.1.6 multicast=yes wireless=IEEE 802.11bgn
WARNING: output may be incomplete or inaccurate, you should run this program as super-user.
iwconfig
wlxe84e0624c146 unassociated Nickname:"<WIFI@REALTEK>"
Mode:Managed Frequency=2.412 GHz Access Point: Not-Associated
Sensitivity:0/0
Retry:off RTS thr:off Fragment thr:off
Power Management:off
Link Quality:0 Signal level:0 Noise level:0
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
enp0s31f6 no wireless extensions.
lo no wireless extensions.
wlx503eaa705446 IEEE 802.11bgn ESSID:"CASAYES-2G" Nickname:"<WIFI@REALTEK>"
Mode:Managed Frequency:2.412 GHz Access Point: 18:9C:27:E6:B1:8F
Bit Rate:72.2 Mb/s Sensitivity:0/0
Retry:off RTS thr:off Fragment thr:off
Power Management:off
Link Quality=91/100 Signal level=67/100 Noise level=0/100
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
ifconfig
enp0s31f6 Link encap:Ethernet HWaddr 30:9c:23:3c:a9:be
inet addr:192.168.1.29 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::8b5f:698f:176f:b36c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:427 errors:0 dropped:0 overruns:0 frame:0
TX packets:311 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:37526 (37.5 KB) TX bytes:38005 (38.0 KB)
Interrupt:16 Memory:df200000-df220000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:12964 errors:0 dropped:0 overruns:0 frame:0
TX packets:12964 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1170822 (1.1 MB) TX bytes:1170822 (1.1 MB)
wlx503eaa705446 Link encap:Ethernet HWaddr 50:3e:aa:70:54:46
inet addr:192.168.1.6 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::b67f:6542:b17c:707c/64 Scope:Link
inet6 addr: 2605:e000:150f:c6a8:11dc:e022:1911:ccef/64 Scope:Global
inet6 addr: 2605:e000:150f:c6a8::1/128 Scope:Global
inet6 addr: 2605:e000:150f:c6a8:83f2:e92e:d885:6fd3/64 Scope:Global
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:28 errors:0 dropped:0 overruns:0 frame:0
TX packets:97 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:4029 (4.0 KB) TX bytes:18154 (18.1 KB)
wlxe84e0624c146 Link encap:Ethernet HWaddr e8:4e:06:24:c1:46
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:6 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
