I'm having a similar errors, I think it has something to do with the latest kernel updates. In my case, the kernel modules were updated on Dec 1. From the apt history.log:
Start-Date: 2020-12-01 07:41:57 Commandline: aptdaemon role='role-commit-packages' sender=':1.297' Install: linux-image-5.4.0-56-generic:amd64 (5.4.0-56.62, automatic), linux-headers-5.4.0-56-generic:amd64 (5.4.0-56.62, automatic), linux-headers-5.4.0-56:amd64 (5.4.0-56.62, automatic), linux-modules-extra-5.4.0-56-generic:amd64 (5.4.0-56.62, automatic), linux-modules-5.4.0-56-generic:amd64 (5.4.0-56.62, automatic) Upgrade: linux-headers-generic:amd64 (5.4.0.54.57, 5.4.0.56.59), linux-libc-dev:amd64 (5.4.0-54.60, 5.4.0-56.62), linux-image-generic:amd64 (5.4.0.54.57, 5.4.0.56.59), snapd:amd64 (2.47.1+20.04, 2.48+20.04), linux-generic:amd64 (5.4.0.54.57, 5.4.0.56.59) End-Date: 2020-12-01 07:43:16 I didn't restart my computer at the time, but shut it down overnight and restarted in the morning of December 2, and that's when I started having very similar issues as described in the original submission. The biggest difference is that the time period of WiFi network disconnects is longer - normally it'll work for a half hour or more, but eventually I'll get disconnected and prompted for a password on a network that I've been connecting to for years. Might have something to do with Realtek wireless adapters: allan ~ $ lspci | grep -i WiFi 03:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter (rev 01) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1906600 Title: WiFi disconnects continually (goes "down" in NetworkManager) Status in Ubuntu MATE: New Status in linux package in Ubuntu: Incomplete Status in network-manager package in Ubuntu: Confirmed Bug description: Hello everybody and thank you in advance for your help. After a recent update, my machine rebooted and appeared to be fine, but after a short time the WiFi dropped and the NetworkManager applet shows that the interface is down. I am also getting prompted for a password (which was previously saved) and when I click on connect it will establish the connection for a short time, but then goes down again. In some cases this is immediate in others, I will be online for up to approximately 15 minutes before it goes down again. I have tried restarting NetworkManager, but I get the same results (short time up, then down). I tried to review log data, but I am not a linux expert and so I'm not sure that I am looking at the right log, nor do I know exactly what to look for. Here are some lines from around the time of the disconnect and the restarting of NetworkManager: ' Dec 01 21:13:24 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875204.3541] dhcp4 (wlo1): state changed unknown -> bound Dec 01 21:13:24 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875204.3698] device (wlo1): state change: ip-config -> ip-check (reason 'none', sys-iface-state: 'managed') Dec 01 21:13:24 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875204.3772] device (wlo1): state change: ip-check -> secondaries (reason 'none', sys-iface-state: 'managed') Dec 01 21:13:24 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875204.3856] device (wlo1): state change: secondaries -> activated (reason 'none', sys-iface-state: 'managed') Dec 01 21:13:24 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875204.3882] manager: NetworkManager state is now CONNECTED_SITE Dec 01 21:13:24 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875204.3945] device (wlo1): Activation: successful, device activated. Dec 01 21:13:24 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875204.3969] manager: NetworkManager state is now CONNECTED_GLOBAL Dec 01 21:15:48 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875348.8909] device (wlo1): supplicant interface state: completed -> authenticating Dec 01 21:15:48 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875348.8910] device (p2p-dev-wlo1): supplicant management interface state: completed -> authenticating Dec 01 21:15:48 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875348.9011] device (wlo1): supplicant interface state: authenticating -> associating Dec 01 21:15:48 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875348.9012] device (p2p-dev-wlo1): supplicant management interface state: authenticating -> associating Dec 01 21:15:48 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875348.9222] device (wlo1): supplicant interface state: associating -> 4-way handshake Dec 01 21:15:48 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875348.9222] device (p2p-dev-wlo1): supplicant management interface state: associating -> 4-way handshake Dec 01 21:15:48 bryan-HP-Notebook NetworkManager[22616]: <warn> [1606875348.9223] sup-iface[0x562ab0adb110,wlo1]: connection disconnected (reason -1) Dec 01 21:15:48 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875348.9297] device (wlo1): supplicant interface state: 4-way handshake -> disconnected Dec 01 21:15:48 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875348.9318] device (wlo1): Activation: (wifi) disconnected during association, asking for new key Dec 01 21:15:48 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875348.9321] device (wlo1): state change: activated -> need-auth (reason 'supplicant-disconnect', sys-iface-state: 'managed') Dec 01 21:15:48 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875348.9526] dhcp4 (wlo1): canceled DHCP transaction Dec 01 21:15:48 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875348.9527] dhcp4 (wlo1): state changed bound -> done Dec 01 21:15:48 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875348.9544] manager: NetworkManager state is now CONNECTING Dec 01 21:15:48 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875348.9603] device (p2p-dev-wlo1): supplicant management interface state: 4-way handshake -> disconnected Dec 01 21:15:49 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875349.4819] device (wlo1): supplicant interface state: disconnected -> scanning Dec 01 21:15:49 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875349.4820] device (p2p-dev-wlo1): supplicant management interface state: disconnected -> scanning Dec 01 21:15:49 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875349.6408] device (wlo1): supplicant interface state: scanning -> inactive Dec 01 21:15:49 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875349.6409] device (p2p-dev-wlo1): supplicant management interface state: scanning -> inactive Dec 01 21:16:42 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875402.0156] device (wlo1): supplicant interface state: inactive -> scanning Dec 01 21:16:42 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875402.0157] device (p2p-dev-wlo1): supplicant management interface state: inactive -> scanning Dec 01 21:16:42 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875402.9557] device (wlo1): supplicant interface state: scanning -> inactive Dec 01 21:16:42 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875402.9558] device (p2p-dev-wlo1): supplicant management interface state: scanning -> inactive Dec 01 21:16:42 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875402.9980] device (wlo1): supplicant interface state: inactive -> scanning Dec 01 21:16:42 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875402.9981] device (p2p-dev-wlo1): supplicant management interface state: inactive -> scanning Dec 01 21:16:43 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875403.9472] device (wlo1): supplicant interface state: scanning -> inactive Dec 01 21:16:43 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875403.9473] device (p2p-dev-wlo1): supplicant management interface state: scanning -> inactive Dec 01 21:16:45 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875405.4449] device (wlo1): supplicant interface state: inactive -> scanning Dec 01 21:16:45 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875405.4450] device (p2p-dev-wlo1): supplicant management interface state: inactive -> scanning Dec 01 21:16:46 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875406.4023] device (wlo1): supplicant interface state: scanning -> inactive Dec 01 21:16:46 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875406.4028] device (p2p-dev-wlo1): supplicant management interface state: scanning -> inactive Dec 01 21:16:47 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875407.4040] device (wlo1): supplicant interface state: inactive -> scanning Dec 01 21:16:47 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875407.4041] device (p2p-dev-wlo1): supplicant management interface state: inactive -> scanning Dec 01 21:16:48 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875408.3604] device (wlo1): supplicant interface state: scanning -> inactive Dec 01 21:16:48 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875408.3611] device (p2p-dev-wlo1): supplicant management interface state: scanning -> inactive Dec 01 21:16:48 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875408.9993] device (wlo1): supplicant interface state: inactive -> scanning Dec 01 21:16:48 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875408.9994] device (p2p-dev-wlo1): supplicant management interface state: inactive -> scanning Dec 01 21:16:50 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875410.3518] device (wlo1): supplicant interface state: scanning -> inactive Dec 01 21:16:50 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875410.3519] device (p2p-dev-wlo1): supplicant management interface state: scanning -> inactive Dec 01 21:16:50 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875410.4086] device (wlo1): supplicant interface state: inactive -> scanning Dec 01 21:16:50 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875410.4087] device (p2p-dev-wlo1): supplicant management interface state: inactive -> scanning Dec 01 21:16:51 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875411.3514] device (wlo1): supplicant interface state: scanning -> inactive Dec 01 21:16:51 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875411.3515] device (p2p-dev-wlo1): supplicant management interface state: scanning -> inactive Dec 01 21:16:52 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875412.4453] device (wlo1): supplicant interface state: inactive -> scanning Dec 01 21:16:52 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875412.4454] device (p2p-dev-wlo1): supplicant management interface state: inactive -> scanning Dec 01 21:16:53 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875413.4255] device (wlo1): supplicant interface state: scanning -> inactive Dec 01 21:16:53 bryan-HP-Notebook NetworkManager[22616]: <info> [1606875413.4255] device (p2p-dev-wlo1): supplicant management interface state: scanning -> inactive My Wireless NIC is (I think): bryan@bryan-HP-Notebook:~$ lspci | grep -i wireless 02:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188EE Wireless Network Adapter (rev 01) Are there any other logs that I may provide that would be useful to the community for this issue? Are there other items I should look at besides NetworkManager as a cause? Any help is certainly appreciated. ps. The wired network still functions flawlessly so I am not sure that this has anything to do with NetworkManager at all. Cheers! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-mate/+bug/1906600/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
