I am using Ubuntu 20.04 for 1 year now and recently stumbled on wifi issues.
When connected to my router the internet connection is very slow and often interrupted. I don't have this problem at all when connected to my android smartphone.
When I ping google (router connection) which usually works :
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
De 192.168.1.54 icmp_seq=1 Host unreachable
De 192.168.1.54 icmp_seq=2 Hôte de destination injoignable
De 192.168.1.54 icmp_seq=3 Hôte de destination injoignable
I tried this solution with no sucess Internet very slow when connected to router wifi
Output from sudo lshw -C network
*-network
description: Interface réseau sans fil
produit: BCM43142 802.11b/g/n
fabricant: Broadcom Inc. and subsidiaries
identifiant matériel: 0
information bus: pci@0000:07:00.0
nom logique: wlp7s0
version: 01
numéro de série: //
bits: 64 bits
horloge: 33MHz
fonctionnalités: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration : broadcast=yes driver=wl0 driverversion=6.30.223.271 (r587334) ip=192.168.43.6 latency=0 multicast=yes wireless=IEEE 802.11
ressources : irq:18 mémoire:b7300000-b7307fff
*-network
description: Ethernet interface
produit: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
fabricant: Realtek Semiconductor Co., Ltd.
identifiant matériel: 0
information bus: pci@0000:08:00.0
nom logique: enp8s0
version: 0c
numéro de série: //
capacité: 1Gbit/s
bits: 64 bits
horloge: 33MHz
fonctionnalités: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration : autonegotiation=on broadcast=yes driver=r8168 driverversion=8.048.00-NAPI latency=0 link=no multicast=yes port=twisted pair
ressources : irq:48 portE/S:4000(taille=256) mémoire:b7200000-b7200fff mémoire:b7000000-b7003fff
I have also switched on/off all possibilities with 2.4GHz and 5GHz on my router, this does not help.
iwconfig
show power management enabled? That can cause issues. It could also be related to the encryption used on wifi as some drivers don't like TKIPwlp7s0 IEEE 802.11 ESSID:// Mode:Managed Frequency:2.412 GHz Access Point: // Retry short limit:7 RTS thr:off Fragment thr:off Power Management:off
Power management is off