I installed Ubuntu 22.04.2 on a Dell Inspiron 14 7425 2-in-1 two months ago. Wifi was working fine until this past week when I had no connection. When I went to Settings->Wi-Fi Wi-Fi was turned off and when I turned it on I received the message
No Wifi Adapter Found. Make sure you have a wifi adapter plugged and turned on
The first time this happened wifi came back after a couple of reboots. But today rebooting has not solved the problem. From the output of the lspci command when the wifi is working (see below) the wifi hardware is MT7921.
Here is the output of several commands when it is not working properly. I will post the correct output of these commands after.
lshw -C network returns nothing
rfkill list all returns
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
lsmod | grep mt:
binfmt_misc 24576 1
btmtk 16384 1 btusb
bluetooth 827392 34 btrtl,btmtk,btintel,btbcm,bnep,btusb,rfcomm
nmcli returns
lo: unmanaged
"lo"
loopback (unknown), 00:00:00:00:00:00, sw, mtu 65536
Use "nmcli device show" to get complete information about known devices and
"nmcli connection show" to get an overview on active connection profiles.
Consult nmcli(1) and nmcli-examples(7) manual pages for complete usage details.
ifconfig returns
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10
loop txqueuelen 1000 (Local Loopback)
RX packets 3181 bytes 227452 (227.4 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 3181 bytes 227452 (227.4 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
dmesg | grep mt returns nothing (no string)
lspci -nnk | grep 0280 -A3 returns nothing (no string)
sudo dpkg -s linux-modules-extra-$(uname -r) | grep Status returns
Status: install ok installed
This reminds me of a previous laptop I had with a wifi hardware switch on the side which I accidentally switched off once. I know more recently that laptops sometimes have Fn-F# switches which disable to hardware but the Dell Inspiron 14 7425 does not seem to have such a key combination for disabling wifi.
Now, 7 hours later, I booted it again and the wifi is now working. I will give the output of the same commands
lshw -C network returns
*-network
description: Wireless interface
product: MT7921 802.11ax PCI Express Wireless Network Adapter
vendor: MEDIATEK Corp.
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlp3s0
logical name: /dev/fb0
version: 00
serial: 10:b1:df:a8:43:c5
width: 64 bits
clock: 33MHz
capabilities: pciexpress msi pm bus_master cap_list ethernet physical wireless fb
configuration: broadcast=yes depth=32 driver=mt7921e driverversion=5.19.0-35-generic firmware=____010000-20220209150915 ip=192.168.0.203 latency=0 link=yes mode=1920x1200 multicast=yes visual=truecolor wireless=IEEE 802.11 xres=1920 yres=1200
resources: iomemory:fc0-fbf iomemory:fc0-fbf iomemory:fc0-fbf irq:93 memory:fcf0200000-fcf02fffff memory:fcf0300000-fcf0303fff memory:fcf0304000-fcf0304fff
rfkill list all returns
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
lsmod | grep mt returns
mt7921e 28672 0
mt7921_common 90112 1 mt7921e
mt76_connac_lib 65536 2 mt7921e,mt7921_common
mt76 102400 3 mt7921e,mt7921_common,mt76_connac_lib
mac80211 1314816 3 mt76,mt7921_common,mt76_connac_lib
btmtk 16384 1 btusb
binfmt_misc 24576 1
bluetooth 827392 34 btrtl,btmtk,btintel,btbcm,bnep,btusb,rfcomm
cfg80211 1044480 4 mt76,mac80211,mt7921_common,mt76_connac_lib
nmcli returns
wlp3s0: connected to MADERSTEVENS
"MEDIATEK Renoir/Cezanne GPP Bridge"
wifi (mt7921e), 10:B1:DF:A8:43:C5, hw, mtu 1500
ip4 default, ip6 default
inet4 192.168.0.203/24
route4 192.168.0.0/24 metric 600
route4 169.254.0.0/16 metric 1000
route4 default via 192.168.0.248 metric 600
inet6 fdfd:6a08:40d:0:d76a:e2a:1695:c234/64
inet6 2607:f2c0:ead8:3cf7:9c01:65ee:8cbf:5584/64
inet6 2607:f2c0:ead8:3cf7::c5c/128
inet6 fdfd:6a08:40d::c5c/128
inet6 fdfd:6a08:40d:0:e964:a4e3:e572:ec16/64
inet6 2607:f2c0:ead8:3cf7:b7b:cc27:fff7:4036/64
inet6 fe80::e159:c10e:50b3:2796/64
route6 fe80::/64 metric 1024
route6 fdfd:6a08:40d::/64 metric 600
route6 2607:f2c0:ead8:3cf7::/64 metric 600
route6 fdfd:6a08:40d::/48 via fe80::1aa6:f7ff:fec1:6e0e metric 600
route6 fdfd:6a08:40d::c5c/128 metric 600
route6 2607:f2c0:ead8:3cf7::c5c/128 metric 600
route6 default via fe80::1aa6:f7ff:fec1:6e0e metric 600
lo: unmanaged
"lo"
loopback (unknown), 00:00:00:00:00:00, sw, mtu 65536
DNS configuration:
servers: 192.168.0.248
domains: lan
interface: wlp3s0
servers: fdfd:6a08:40d::1
interface: wlp3s0
Use "nmcli device show" to get complete information about known devices and "nmcli connection show" to get an overview on active connection profiles.
Consult nmcli(1) and nmcli-examples(7) manual pages for complete usage details.
ifconfig returns
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10
loop txqueuelen 1000 (Local Loopback)
RX packets 247 bytes 25967 (25.9 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 247 bytes 25967 (25.9 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlp3s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.0.203 netmask 255.255.255.0 broadcast 192.168.0.255
inet6 2607:f2c0:ead8:3cf7:9c01:65ee:8cbf:5584 prefixlen 64 scopeid 0x0
inet6 2607:f2c0:ead8:3cf7:b7b:cc27:fff7:4036 prefixlen 64 scopeid 0x0
inet6 fdfd:6a08:40d::c5c prefixlen 128 scopeid 0x0
inet6 fdfd:6a08:40d:0:d76a:e2a:1695:c234 prefixlen 64 scopeid 0x0
inet6 2607:f2c0:ead8:3cf7::c5c prefixlen 128 scopeid 0x0
inet6 fe80::e159:c10e:50b3:2796 prefixlen 64 scopeid 0x20
inet6 fdfd:6a08:40d:0:e964:a4e3:e572:ec16 prefixlen 64 scopeid 0x0
ether 10:b1:df:a8:43:c5 txqueuelen 1000 (Ethernet)
RX packets 1138 bytes 1385314 (1.3 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 741 bytes 166181 (166.1 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
dmesg | grep mt returns
[ 4.028603] mt7921e 0000:03:00.0: enabling device (0000 -> 0002)
[ 4.056150] mt7921e 0000:03:00.0: ASIC revision: 79610010
[ 4.136518] mt7921e 0000:03:00.0: HW/SW Version: 0x8a108a10, Build Time: 20220209150832a
[ 4.396184] mt7921e 0000:03:00.0: WM Firmware Version: ____010000, Build Time: 20220209150915
[ 5.222637] mt7921e 0000:03:00.0 wlp3s0: renamed from wlan0
lspci -nnk | grep 0280 -A3 returns
03:00.0 Network controller [0280]: MEDIATEK Corp. MT7921 802.11ax PCI Express Wireless Network Adapter [14c3:7961]
Subsystem: Foxconn International, Inc. Device [105b:e0b7]
Kernel driver in use: mt7921e
Kernel modules: mt7921e
sudo dpkg -s linux-modules-extra-$(uname -r) | grep Status returns
Status: install ok installed
