After working in the ssh session for a while, the message suddenly appears:
Broadcast message from user@rock-5c (Wed 2025-02-26 11:08:02 CET):
The system will suspend now!
Judging by the entries of journalctl, suspend is triggered in the kernel, not in systemd
$ journalctl -b | grep -i suspend
Feb 26 11:00:29 rock-5c kernel: rk806 spi2.0: dvs-suspend-control-by missing!
Feb 26 11:00:29 rock-5c kernel: rockchip-dmc dmc: suspend_rate = 528000000
Feb 26 11:00:29 rock-5c kernel: rockchip-dmc dmc: deep_suspend_rate = 2112000000
Feb 26 11:00:29 rock-5c kernel: rockchip-pm rockchip-suspend: not set pwm-regulator-config
Feb 26 11:00:29 rock-5c kernel: rockchip-suspend not set sleep-mode-config for mem-lite
Feb 26 11:00:29 rock-5c kernel: rockchip-suspend not set wakeup-config for mem-lite
Feb 26 11:00:29 rock-5c kernel: rockchip-suspend not set sleep-mode-config for mem-ultra
Feb 26 11:00:29 rock-5c kernel: rockchip-suspend not set wakeup-config for mem-ultra
Can anyone tell me what the cause is and how I can fix it?