WiFi connection keeps disconnecting Ubuntu 20.04
My internet connection keeps disconnecting for a random period of time and then reconnects. Sometimes it even disconnects and reconnects for 5-10 minutes straight. I have no idea what might be the issue I tried reinstalling the network manager but I couldn't resolve the issue.
Here are some logs from the network-manager service:
<info> [1632573472.6381] device (wlo1): supplicant interface state: associated -> 4-way handshake
<info> [1632573472.6554] device (wlo1): supplicant interface state: 4-way handshake -> completed
<warn> [1632573513.4970] sup-iface[0x55fc01265100,wlo1]: connection disconnected (reason -4)
<info> [1632573513.5222] device (wlo1): supplicant interface state: completed -> disconnected
<info> [1632573514.1056] device (wlo1): supplicant interface state: disconnected -> scanning
<info> [1632573518.6169] device (wlo1): supplicant interface state: scanning -> authenticating
<info> [1632573518.6272] device (wlo1): supplicant interface state: authenticating -> associating
<info> [1632573518.6315] device (wlo1): supplicant interface state: associating -> associated
<info> [1632573518.6374] device (wlo1): supplicant interface state: associated -> 4-way handshake
<info> [1632573518.6457] device (wlo1): supplicant interface state: 4-way handshake -> completed
uname
$ uname -a
Linux bojan-HP-250-G7-Notebook-PC 5.11.0-34-generic #36~20.04.1-Ubuntu SMP Fri Aug 27 08:06:32 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
lshw
$ sudo lshw -class 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: 15
serial: e8:d8:d1:32:05:d5
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=5.11.0-34-generic firmware=rtl8168h-2_0.0.2 02/26/15 latency=0 link=no multicast=yes port=twisted pair
resources: irq:16 ioport:4000(size=256) memory:b1104000-b1104fff memory:b1100000-b1103fff
*-network
description: Wireless interface
product: RTL8821CE 802.11ac PCIe Wireless Network Adapter
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlo1
version: 00
serial: c0:e4:34:73:1f:21
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=rtw_8821ce driverversion=5.11.0-34-generic firmware=N/A ip=192.168.100.73 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:129 ioport:3000(size=256) memory:b1000000-b100ffff
*-network:0
description: Ethernet interface
physical id: 3
logical name: vethf0e7b23
serial: de:97:8e:dc:a2:da
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
*-network:1
description: Ethernet interface
physical id: 4
logical name: vethed7164b
serial: 4e:68:b7:51:6a:bd
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
modinfo
$ modinfo rtl8723be
filename: /lib/modules/5.11.0-34-generic/kernel/drivers/net/wireless/realtek/rtlwifi/rtl8723be/rtl8723be.ko
firmware: rtlwifi/rtl8723befw_36.bin
firmware: rtlwifi/rtl8723befw.bin
description: Realtek 8723BE 802.11n PCI wireless
license: GPL
author: Realtek WlanFAE <[email protected]>
author: PageHe <[email protected]>
srcversion: 17AE822AE3E2EAA1A500831
alias: pci:v000010ECd0000B723sv*sd*bc*sc*i*
depends: rtlwifi,rtl8723-common,rtl_pci,btcoexist,mac80211
retpoline: Y
intree: Y
name: rtl8723be
vermagic: 5.11.0-34-generic SMP mod_unload modversions
sig_id: PKCS#7
signer: Build time autogenerated kernel key
sig_key: 3F:78:34:4A:10:B7:65:C2:C5:FF:66:4E:89:21:35:FA:74:C9:00:B5
sig_hashalgo: sha512
signature: 7E:E7:04:AA:0E:EC:DE:B0:6F:56:12:5A:7C:3E:7D:A0:98:4E:BB:3A:
32:A2:24:BE:59:53:2F:E8:1B:E4:3E:63:57:FF:50:C4:E8:81:86:BE:
72:3A:CD:49:9A:18:48:CB:0F:29:B9:22:F1:14:F2:4B:47:A8:E2:58:
77:79:4C:CF:0F:FB:DA:9A:F9:C3:94:5E:A2:AF:EA:82:68:77:E8:66:
1B:0A:D0:41:EE:E8:3A:B8:F5:B9:C7:B9:17:61:BE:50:9D:D8:0E:30:
1E:9E:64:75:53:E9:C3:CB:E4:BE:0B:36:09:07:87:BF:C3:CF:83:ED:
9D:F6:39:C2:6D:7F:35:EC:8B:B2:BC:C6:6E:EB:F2:9C:1B:99:53:5B:
57:12:B6:AF:80:D3:BF:F3:CF:94:9B:6F:8E:E7:CD:6A:08:48:FC:83:
69:EF:A7:AC:CC:4F:58:ED:C9:DC:E1:E6:E7:54:00:C5:1D:F9:5F:91:
7D:93:C4:6A:66:DC:A1:F3:B3:30:0E:13:DF:2B:AD:5F:5A:70:C1:7A:
0A:1C:63:22:D7:BA:95:13:DC:A3:30:13:C7:97:3E:CE:1C:BA:4F:AC:
E2:F8:4E:6A:00:F0:69:8E:92:85:40:C1:55:10:37:CD:69:4E:42:ED:
CC:48:E3:A5:10:C4:C6:20:51:5B:FE:17:E4:18:8D:D0:A7:43:44:B1:
48:19:5B:F3:67:8E:94:81:CE:40:C2:DD:E5:B2:89:D3:01:DF:7C:21:
98:91:21:BA:2D:F1:50:F7:DF:86:23:31:A8:22:33:87:C7:8C:95:5A:
22:CB:56:E4:1C:60:83:E9:19:56:5E:24:46:E7:75:7E:46:FD:A9:8C:
DA:02:26:C5:16:2D:D9:58:F9:D7:92:12:11:8E:CF:14:53:1B:3A:4A:
F3:E6:32:F2:B2:47:08:34:C8:4A:5E:56:C5:12:BD:92:D1:A6:09:15:
37:07:6D:69:49:A3:6D:8B:3F:30:C7:33:3B:69:AD:98:75:D3:17:2C:
18:B5:0B:2F:6A:73:94:83:E0:A3:C8:BA:83:63:36:B1:CE:2B:48:B8:
7B:A4:6D:BF:C3:53:80:25:4E:B0:8A:BC:04:0D:FB:49:B7:3F:B5:10:
EF:FC:9D:2B:35:AE:73:24:ED:57:18:AE:29:49:48:92:DB:4F:04:D9:
3B:D5:D2:81:80:48:5E:CE:9C:D1:FA:1E:4B:36:0D:E6:83:EB:FB:45:
DD:EC:D1:8D:66:B2:48:8D:E4:65:D2:F2:D3:82:B0:22:D4:5D:D3:C8:
22:17:A9:AB:A6:70:09:5F:44:CC:A3:C4:90:85:9C:3E:F8:9A:45:8A:
89:0A:E1:47:88:66:39:E9:AF:9A:F1:AA
parm: swenc:Set to 1 for software crypto (default 0)
(bool)
parm: ips:Set to 0 to not use link power save (default 1)
(bool)
parm: swlps:Set to 1 to use SW control power save (default 0)
(bool)
parm: fwlps:Set to 1 to use FW control power save (default 1)
(bool)
parm: msi:Set to 1 to use MSI interrupts mode (default 0)
(bool)
parm: aspm:Set to 1 to enable ASPM (default 1)
(int)
parm: debug_level:Set debug level (0-5) (default 0) (int)
parm: debug_mask:Set debug mask (default 0) (ullong)
parm: disable_watchdog:Set to 1 to disable the watchdog (default 0)
(bool)
parm: ant_sel:Set to 1 or 2 to force antenna number (default 0)
(int)
ls
ls -al /etc/pm/config.d/
ls: cannot access '/etc/pm/config.d/': No such file or directory
sudo ls -al /etc/pm/config.d/
ls: cannot access '/etc/pm/config.d/': No such file or directory
ls
$ ls -al /etc/modprobe.d/
total 68
drwxr-xr-x 2 root root 4096 јул 31 08:54 .
drwxr-xr-x 149 root root 12288 сеп 24 17:19 ..
-rw-r--r-- 1 root root 2507 јул 31 2015 alsa-base.conf
-rw-r--r-- 1 root root 154 фев 16 2020 amd64-microcode-blacklist.conf
-rw-r--r-- 1 root root 325 мар 12 2020 blacklist-ath_pci.conf
-rw-r--r-- 1 root root 1518 јан 17 2021 blacklist.conf
-rw-r--r-- 1 root root 210 мар 12 2020 blacklist-firewire.conf
-rw-r--r-- 1 root root 677 мар 12 2020 blacklist-framebuffer.conf
-rw-r--r-- 1 root root 156 јул 31 2015 blacklist-modem.conf
lrwxrwxrwx 1 root root 41 јун 3 2020 blacklist-oss.conf -> /lib/linux-sound-base/noOSS.modprobe.conf
-rw-r--r-- 1 root root 583 мар 12 2020 blacklist-rare-network.conf
-rw-r--r-- 1 root root 264 апр 13 2020 broadcom-sta-common.conf
-rw-r--r-- 1 root root 180 апр 13 2020 broadcom-sta-dkms.conf
-rw-r--r-- 1 root root 127 јан 22 2020 dkms.conf
-rw-r--r-- 1 root root 154 фев 12 2020 intel-microcode-blacklist.conf
-rw-r--r-- 1 root root 347 мар 12 2020 iwlwifi.conf
iwlist
sudo iwlist freq
lo no frequency information.
eno1 no frequency information.
wlo1 26 channels in total; available frequencies :
Channel 01 : 2.412 GHz
Channel 02 : 2.417 GHz
Channel 03 : 2.422 GHz
Channel 04 : 2.427 GHz
Channel 05 : 2.432 GHz
Channel 06 : 2.437 GHz
Channel 07 : 2.442 GHz
Channel 08 : 2.447 GHz
Channel 09 : 2.452 GHz
Channel 10 : 2.457 GHz
Channel 11 : 2.462 GHz
Channel 12 : 2.467 GHz
Channel 13 : 2.472 GHz
Channel 36 : 5.18 GHz
Channel 40 : 5.2 GHz
Channel 44 : 5.22 GHz
Channel 48 : 5.24 GHz
Channel 52 : 5.26 GHz
Channel 56 : 5.28 GHz
Channel 60 : 5.3 GHz
Channel 64 : 5.32 GHz
Channel 149 : 5.745 GHz
Channel 153 : 5.765 GHz
Channel 157 : 5.785 GHz
Channel 161 : 5.805 GHz
Channel 165 : 5.825 GHz
Current Frequency=2.457 GHz (Channel 10)
br-ec141e7941cd no frequency information.
br-f93fc947e076 no frequency information.
br-080efbda3d64 no frequency information.
br-1110f8e908c5 no frequency information.
br-6e3cb22ca843 no frequency information.
br-d3126a6e15ac no frequency information.
docker0 no frequency information.
br-46b9b7a049c8 no frequency information.
br-6390def20095 no frequency information.
vethf0e7b23 no frequency information.
vethed7164b no frequency information.
lspci
lspci -knn | grep Net -A2
02:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe Wireless Network Adapter [10ec:c821]
DeviceName: WLAN
Subsystem: Hewlett-Packard Company RTL8821CE 802.11ac PCIe Wireless Network Adapter [103c:831a]
Kernel driver in use: rtw_8821ce
Kernel modules: rtw88_8821ce
lsmod
sudo lsmod | grep rtl8723be
iwconfig
sudo iwconfig
lo no wireless extensions.
eno1 no wireless extensions.
wlo1 IEEE 802.11 ESSID:"marko"
Mode:Managed Frequency:2.457 GHz Access Point: F8:BF:09:85:63:68
Bit Rate=58.5 Mb/s Tx-Power=20 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:on
Link Quality=70/70 Signal level=-36 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:7 Invalid misc:176 Missed beacon:0
br-ec141e7941cd no wireless extensions.
br-f93fc947e076 no wireless extensions.
br-080efbda3d64 no wireless extensions.
br-1110f8e908c5 no wireless extensions.
br-6e3cb22ca843 no wireless extensions.
br-d3126a6e15ac no wireless extensions.
docker0 no wireless extensions.
br-46b9b7a049c8 no wireless extensions.
br-6390def20095 no wireless extensions.
vethf0e7b23 no wireless extensions.
vethed7164b no wireless extensions.
inxi
inxi -Fxz
Command 'inxi' not found, but can be installed with:
sudo apt install inxi
Fix
By adding the following drivers to the blacklist in /etc/modprobe.d/blacklist.conf and installing rtl8821ce I was able to fix the issue. Once I executed the commands I rebooted my laptop and the issue was resolved. Thanks for the help @sancho.sReinstateMonicaCellio.
sudo nano /etc/modprobe.d/blacklist.conf
blacklist 8821ce
blacklist rtw88
blacklist rtw88_8821ce
blacklist rtw88_8821c
blacklist rtw88_pci
blacklist rtw88_core
sudo apt-get install dkms build-essential rtl8821ce-dkms
Solution 1:
You have a Realtek RTL8821CE 802.11ac/abgn PCIe WLAN with Bluetooth 5.0 Single-Chip Controller, with driver rtw_8821ce.
As mentioned in a comment, there is likely interference between bluetooth and wifi.
Please do the following to try solving the problem:
-
Post the output of
$ modinfo rtw_8821ce <-- Replace the current posted modinfo $ ls -al /etc/pm/ $ sudo lsmod | grep rtw_8821ce -
Post the exact brand/model of your PC.
-
Be ready to perform your own web searches for information, and take time to try on your own.
You might need this solution.
Related:
- https://linux-hardware.org/index.php?id=pci:10ec-c821-17aa-c024
- https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1927808