Eu instalei o Ubuntu em um PC antigo e tudo está funcionando bem além do Wifi. Eu tentei 2 dongles USB diferentes e nenhum deles funciona. Eu posso ver as redes Wi-Fi, mas não consigo me conectar a elas. O mesmo adaptador wifi (pelo menos 1) está funcionando bem em um computador com Windows 7.
A seguir estão as saídas de alguns comandos: ip a
> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
> link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
> inet 127.0.0.1/8 scope host lo
> valid_lft forever preferred_lft forever
> inet6 ::1/128 scope host
> valid_lft forever preferred_lft forever
> 2: enp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
> link/ether 8c:89:a5:65:5e:b4 brd ff:ff:ff:ff:ff:ff
> inet 192.168.1.25/24 brd 192.168.1.255 scope global enp4s0
> valid_lft forever preferred_lft forever
> inet6 fe80::6fff:9d2:3257:a8fa/64 scope link
> valid_lft forever preferred_lft forever
> 3: wlx20e1170256de: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
> link/ether b2:01:28:26:8a:eb brd ff:ff:ff:ff:ff:ff
ifconfig
ifconfig
> enp4s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
> inet 192.168.1.25 netmask 255.255.255.0 broadcast 192.168.1.255
> inet6 fe80::6fff:9d2:3257:a8fa prefixlen 64 scopeid 0x20<link>
> ether 8c:89:a5:65:5e:b4 txqueuelen 1000 (Ethernet)
> RX packets 91680 bytes 131193730 (131.1 MB)
> RX errors 0 dropped 0 overruns 0 frame 0
> TX packets 55984 bytes 4237086 (4.2 MB)
> TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
>
> lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
> inet 127.0.0.1 netmask 255.0.0.0
> inet6 ::1 prefixlen 128 scopeid 0x10<host>
> loop txqueuelen 1000 (Local Loopback)
> RX packets 356 bytes 25918 (25.9 KB)
> RX errors 0 dropped 0 overruns 0 frame 0
> TX packets 356 bytes 25918 (25.9 KB)
> TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
>
> wlx20e1170256de: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
> ether b2:01:28:26:8a:eb txqueuelen 1000 (Ethernet)
> RX packets 0 bytes 0 (0.0 B)
> RX errors 0 dropped 0 overruns 0 frame 0
> TX packets 0 bytes 0 (0.0 B)
> TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lsusb
Bus 001 Device 004: ID 148f:7601 Ralink Technology, Corp. MT7601U Wireless Adapter
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 003: ID 045e:0750 Microsoft Corp. Wired Keyboard 600
Bus 002 Device 002: ID 04f3:0230 Elan Microelectronics Corp. 3D Optical Mouse
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
lista de tarefas
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
iwconfig
enp4s0 no wireless extensions.
lo no wireless extensions.
wlx20e1170256de IEEE 802.11 ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
ifconfig
enp4s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.25 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::6fff:9d2:3257:a8fa prefixlen 64 scopeid 0x20<link>
ether 8c:89:a5:65:5e:b4 txqueuelen 1000 (Ethernet)
RX packets 102046 bytes 146232544 (146.2 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 62234 bytes 4747233 (4.7 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 356 bytes 25918 (25.9 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 356 bytes 25918 (25.9 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlx20e1170256de: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 3e:94:0e:15:16:90 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lshw
*-network
description: Wireless interface
physical id: 1
bus info: usb@1:6
logical name: wlx20e1170256de
serial: 2a:27:6a:35:bd:a5
capabilities: ethernet physical wireless
configuration: broadcast=yes driver=mt7601u driverversion=4.10.0-19-generic firmware=N/A link=no multicast=yes wireless=IEEE 802.11
ifconfig wlx20e1170256de
wlx20e1170256de: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 2a:27:6a:35:bd:a5 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ifconfig wlan0
wlan0: error fetching interface information: Device not found
lsb_release -d
Description: Ubuntu 17.04