phylax2020
commented
3 months ago Further research into this issue yielded the following results:
If there is no traffic over WLAN for a long period of time, the system decides to interrupt the WLAN0 connection. The connection remains interrupted and is not reactivated automatically. The minimum WLAN idle time is exactly 12 hours. The only way to get out of this state is to restart the NetworkManager.
In order to make this effect visible, I used a bash script that periodically checks the status of the WLAN connection every 2 minutes via crontab. If the WLAN connection is interrupted, a message is written to the journal and the NetworkManager is restarted.
#!/bin/bash
# restart NetworkManager when wlan0 disappeared
if [ "$(nmcli -g GENERAL.STATE dev show wlan0)" = "30 (disconnected)" ]; then
echo "wlan0 disconnected" | systemd-cat
systemctl restart NetworkManager
fiDoes anyone know where in the OS there is a timeout of exactly 12 hours that leads to this problem? As already reported, the WLAN power management is switched off and is therefore not a possible cause.
fwoomer
lurch
Clownfish33
JamesH65
I have a Raspberry Pi 5b running the latest bookworm version from Raspberry Pi Imager v1.8.4: Pi OS (64-bit) with Raspberry Pi Desktop. I followed the different steps to install the OS with WiFi on a USB memory stick. I also did update the OS with apt update and apt full-upgrade. The current OS version is: Linux RaspberryPi 6.1.0-rpi8-rpi-2712 #1 SMP PREEMPT Debian 1:6.1.73-1+rpt1 (2024-01-25) aarch64 GNU/Linux
Next I generated a virtual WLAN1 interface on wlan0 and turned off power save in /etc/rc.local:
Next i nstalled an access point on WLAN1 with NetworkManger:
All works fine for few hours or up to several day. Then suddenly the network indicator on the desktop is grayed out and states, that wlan0 is no langer available, the hotspot at IP: 192.168.4.1 is still active. The WLAN router (FRITZBOX 7490) has a strong and stable WLAN signal and is located nearby the RPi 5 and is still connected to other devices in the WLAN network.
Also the access point is still reachable by using smart phones or tablet computers. The log generated by journalctl shows the following errors, when the wlan0 connection disappears:
The problem starts at this point without any external cause:
Feb 25 14:32:56 RaspberryPi wpa_supplicant[866]: wlan0: CTRL-EVENT-DISCONNECTED bssid=c8:0e:14:27:6d:b5 reason=3The status of NetworkManager is as follows:
The device states with 'nmcli dev' is as follows:
The problem persists until you restart NetworkManager. If I set up the system with the 32Bit OS-Lite version of Bookworm in the same way and run it on a Pi zero 2W, there are no problems.
Does anyone have an idea of what might be causing this error and how to fix it?