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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.

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    There is nothing that can be done on software level. It can be a bad contact with antennas, etc.
    – Pilot6
    Jan 27, 2023 at 19:20
  • Thanks for the feedback Pilot6. I can't quite understand why it isn't related to software. In fact : Via hotspot it is functionning today, it was previously functionning with strictly the same router and with the router sometimes it works for 5 minutes and then drops.
    – Artaga
    Jan 27, 2023 at 19:51
  • Does 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 TKIP
    – Jeremy31
    Jan 27, 2023 at 22:44
  • wlp7s0 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
    – Artaga
    Jan 29, 2023 at 11:54
  • Removing TKIP encryption on the router did not help either unfortunately. One piece of information I missed : sometimes a DNS type error shows up when the connection crashes.
    – Artaga
    Jan 29, 2023 at 16:10

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