Eu pesquisei alguns tópicos, mas não vi nada semelhante a esses problemas.
Eu não sei porque o Ubuntu não consegue detectar o meu Wi-Fi ou dá um sinal fraco, enquanto no Windows, a rede aparece com 3 ou 4 de 5 barras de força do sinal e se conecta imediatamente. isso é um problema com o driver padrão?
aqui está a saída do comando lshw -C network .
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:01:00.0
logical name: eno1
version: 07
serial: 10:60:4b:4a:c0:24
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=half firmware=rtl8168e-3_0.0.4 03/27/12 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:25 ioport:3000(size=256) memory:c2404000-c2404fff memory:c2400000-c2403fff
*-network
description: Wireless interface
product: AR9485 Wireless Network Adapter
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlo1
version: 01
serial: 20:68:9d:87:05:2d
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless
configuration: broadcast=yes driver=ath9k driverversion=4.15.0-20-generic firmware=N/A ip=192.168.1.16 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:18 memory:c2500000-c257ffff memory:c2580000-c258ffff
EDIT: Aqui está a saída do comando lspci -knn | grep Net -A3; rfkill list
02:00.0 Network controller [0280]: Qualcomm Atheros AR9485 Wireless Network Adapter [168c:0032] (rev 01)
Subsystem: Hewlett-Packard Company AR9485 Wireless Network Adapter [103c:1785]
Kernel driver in use: ath9k
Kernel modules: ath9k
03:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5229 PCI Express Card Reader [10ec:5229] (rev 01)
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
1: hci0: Bluetooth
Soft blocked: yes
Hard blocked: no