I had this problem before: All my WLAN connected Raspberry Pi machines lost their network connection after 1-3 days. The problem went away after I changed my router (from Synology RT2600 to Ubiquity UCG Fiber).
Note that I lost the lease, not the WLAN connection as such. Even with the new router, the WLAN connection is still via the Synology RT2600. The latter just no longer performs routing functions.
After I installed two Raspberry Pi machines with Trixie (fresh installation), I am again losing the network connection after a day. The WLAN still shows as connected (on the GUI), but WLAN0 no longer has an IP address. The router does not show the device as present.
No other machine on my network experience this issue, including the Debian 12 Raspberry Pi boxes.
Does anyone have an idea on how to debug this? "dmesg" shows nothing at all related to WLAN or DHCP. When I had the issue before, I could at least see some entries in the log, and could pinpoint the time when the lease was lost.
Note that I lost the lease, not the WLAN connection as such. Even with the new router, the WLAN connection is still via the Synology RT2600. The latter just no longer performs routing functions.
After I installed two Raspberry Pi machines with Trixie (fresh installation), I am again losing the network connection after a day. The WLAN still shows as connected (on the GUI), but WLAN0 no longer has an IP address. The router does not show the device as present.
No other machine on my network experience this issue, including the Debian 12 Raspberry Pi boxes.
Does anyone have an idea on how to debug this? "dmesg" shows nothing at all related to WLAN or DHCP. When I had the issue before, I could at least see some entries in the log, and could pinpoint the time when the lease was lost.
Statistics: Posted by Tinue — Mon Oct 27, 2025 6:03 am