We have around 250 Lenovo ThinkCentre M90n-1 devices on which we have set suspend mode on for the night, and WakeSystem=true for the morning, triggered by the system timer.
The issue is that we have around random 2 devices per week not waking up from the suspend mode. M90n-1
I would like to have your suggestions about how to solve this problem.
Lenovo ThinkCentre M90n-1 4GB RAM (Swap = 2GB)
uname -a output
Linux 5.15.0-69-generic #76~20.04.1-Ubuntu
Our wake up service is as follows.
cat auto-resume.timer
[Unit]
Description=Automatically resume on a schedule
[Timer]
OnCalendar=--* 07:00:00
WakeSystem=true
The screen appears on the screen during pc wake-up, but after a short while it hangs-freeze and no action can be taken, but it is fixed by turning the pc off and on.
The relevant syslog record is as follows.
Apr 6 02:03:35 3000000123 nm-dispatcher[36654]: run-parts: failed to stat component /etc/network/if-post-down.d/avahi-daemon: No such file or directory
Apr 6 02:03:35 3000000123 systemd[1]: Reached target Sleep.
Apr 6 02:03:35 3000000123 systemd[1]: Starting Record successful boot for GRUB...
Apr 6 02:03:35 3000000123 systemd[1]: Starting Suspend...
Apr 6 02:03:35 3000000123 systemd-sleep[36659]: Suspending system...
Apr 6 02:03:35 3000000123 systemd[1]: grub-common.service: Succeeded.
Apr 6 02:03:35 3000000123 kernel: [115451.065577] PM: suspend entry (deep)
Apr 6 02:03:35 3000000123 systemd[1]: Finished Record successful boot for GRUB.
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^
@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@
Apr 6 09:22:36 3000000123 systemd-modules-load[639]: Inserted module 'lp'
Apr 6 09:22:36 3000000123 systemd-modules-load[639]: Inserted module 'ppdev'
Apr 6 09:22:36 3000000123 systemd-modules-load[639]: Inserted module 'parport_pc'
Apr 6 09:22:36 3000000123 systemd-modules-load[639]: Inserted module 'msr'
Apr 6 09:22:36 3000000123 lvm[631]: 2 logical volume(s) in volume group "vgubuntu" monitored
I would like to have your suggestions about how to solve this problem. Thank you
