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OCI – Ubuntu 22 .04 LTS Instance Stops Responding 20 Minutes After Boot


Applies to: 

Oracle Cloud Infrastructure - Version N/A and later

Ubuntu 22.04 LTS



Twenty minutes after being started, the instance stops responding completely – no ssh, no application services, no network response. To restore functionality, the instance needs to be rebooted from the OCI console. After another 20 minutes the issue repeats.


During a recent software installation, packages were installed from multiple sources in the instance along with their dependencies.

In the /var/log/syslog file, it can be seen that before each time the instance stops responding the system is being suspended by systemd after 20 minutes:

Sep 3 17:56:29 <HOSTNAME> ModemManager[1108]: <info> [sleep-monitor-systemd] system is about to suspend
 Sep 3 17:56:29 <HOSTNAME> NetworkManager[1020]: <info> [1693763789.4175] manager: sleep: sleep requested (sleeping: no enabled: yes)
 Sep 3 17:56:29 <HOSTNAME> NetworkManager[1020]: <info> [1693763789.4187] manager: NetworkManager state is now ASLEEP
 Sep 3 17:56:29 <HOSTNAME> gnome-shell[39372]: Screen lock is locked down, not locking
 Sep 3 17:56:29 <HOSTNAME> systemd[1]: Reached target Sleep.
 Sep 3 17:56:29 <HOSTNAME> systemd[1]: Starting Record successful boot for GRUB...
 Sep 3 17:56:29 <HOSTNAME> systemd[1]: Starting System Suspend...
 Sep 3 17:56:29 <HOSTNAME> systemd[1]: grub-common.service: Deactivated successfully.
 Sep 3 17:56:29 <HOSTNAME> systemd[1]: Finished Record successful boot for GRUB.
 Sep 3 17:56:29 <HOSTNAME> systemd-sleep[39790]: Entering sleep state 'suspend'...
 Sep 3 17:56:29 <HOSTNAME> systemd[1]: Starting GRUB failed

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