Ask Ubuntu Asked by Skïp on December 3, 2021
I just did a fresh install of Ubuntu 20.04 on an old computer and every time I wake up the computer from sleep the WiFi drops and there is no way to connect it back (also rarely happens randomly when device is not put to sleep).
The wifi card is an Atheros AR9485 (internal) and is running using ath9k & everything is up-to-date
I tried plugging in a Belkin USB WiFi dongle and it disables itself with the PCI card every time.
When it does not work rfkill list shows phy0 (the PCI card) as Hard blocked and there is no way I found that would enable it again besides restarting the computer. (The dongle is not shown as blocked but is still disabled)
If I soft block phy0 with rfkill its shutdowns the dongle too.
I also tried removing the Atheros card from network-management and it didn’t change anything.
Debug info when everything is running smooth (no dongle) :
ifconfig:
enp3s0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 18:67:b0:40:f4:f2 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
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 (Boucle locale)
RX packets 870 bytes 90566 (90.5 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 870 bytes 90566 (90.5 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.13 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 2a01:cb11:403:2100:d0d8:a6ca:c7b:9b10 prefixlen 64 scopeid 0x0<global>
inet6 2a01:cb11:403:2100:8edf:fd97:4e60:42a4 prefixlen 64 scopeid 0x0<global>
inet6 fe80::6091:8aac:3e3:b613 prefixlen 64 scopeid 0x20<link>
ether 24:fd:52:99:40:2d txqueuelen 1000 (Ethernet)
RX packets 37519 bytes 46147156 (46.1 MB)
RX errors 0 dropped 89 overruns 0 frame 0
TX packets 16308 bytes 2312226 (2.3 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lshw -C network:
*-network
description: Interface réseau sans fil
produit: AR9485 Wireless Network Adapter
fabricant: Qualcomm Atheros
identifiant matériel: 0
information bus: pci@0000:02:00.0
nom logique: wlp2s0
version: 01
numéro de série: 24:fd:52:99:40:2d
bits: 64 bits
horloge: 33MHz
fonctionnalités: pm msi pciexpress bus_master cap_list rom ethernet physical wireless
configuration : broadcast=yes driver=ath9k driverversion=5.4.0-40-generic firmware=N/A ip=192.168.1.13 latency=0 link=yes multicast=yes wireless=IEEE 802.11
ressources : irq:16 mémoire:f7900000-f797ffff mémoire:f7980000-f798ffff
*-network
description: Ethernet interface
produit: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
fabricant: Realtek Semiconductor Co., Ltd.
identifiant matériel: 0
information bus: pci@0000:03:00.0
nom logique: enp3s0
version: 06
numéro de série: 18:67:b0:40:f4:f2
capacité: 1Gbit/s
bits: 64 bits
horloge: 33MHz
fonctionnalités: 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 firmware=rtl8168e-3_0.0.4 03/27/12 latency=0 link=no multicast=yes port=MII
ressources : irq:19 portE/S:d000(taille=256) mémoire:f7800000-f7800fff mémoire:f2100000-f2103fff
lspci | grep -i wireless:
02:00.0 Network controller: Qualcomm Atheros AR9485 Wireless Network Adapter (rev 01)
Debug info when nothing works (no dongle) :
ifconfig:
enp3s0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 18:67:b0:40:f4:f2 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
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 (Boucle locale)
RX packets 10373 bytes 880405 (880.4 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 10373 bytes 880405 (880.4 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lshw -C network:
*-network DÉSACTIVÉ
description: Interface réseau sans fil
produit: AR9485 Wireless Network Adapter
fabricant: Qualcomm Atheros
identifiant matériel: 0
information bus: pci@0000:02:00.0
nom logique: wlp2s0
version: 01
numéro de série: 24:fd:52:99:40:2d
bits: 64 bits
horloge: 33MHz
fonctionnalités: pm msi pciexpress bus_master cap_list rom ethernet physical wireless
configuration : broadcast=yes driver=ath9k driverversion=5.4.0-40-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11
ressources : irq:16 mémoire:f7900000-f797ffff mémoire:f7980000-f798ffff
*-network
description: Ethernet interface
produit: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
fabricant: Realtek Semiconductor Co., Ltd.
identifiant matériel: 0
information bus: pci@0000:03:00.0
nom logique: enp3s0
version: 06
numéro de série: 18:67:b0:40:f4:f2
capacité: 1Gbit/s
bits: 64 bits
horloge: 33MHz
fonctionnalités: 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 firmware=rtl8168e-3_0.0.4 03/27/12 latency=0 link=no multicast=yes port=MII
ressources : irq:19 portE/S:d000(taille=256) mémoire:f7800000-f7800fff mémoire:f2100000-f2103fff
lspci | grep -i wireless:
02:00.0 Network controller: Qualcomm Atheros AR9485 Wireless Network Adapter (rev 01)
cat /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf:
[Connection]
wifi.powersave = 3
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