Ubuntu Version: 26.04
Desktop Environment (if applicable):
GNOME
Problem Description:
Unattended-upgrade-shutdown rebooting system without warning
Example:
Jul 26 19:33:38 Ubuntu-PC1 sbkeysync[3929]: /usr/share/secureboot/updates/dbx/dbxupdate_x64.bin
Jul 26 19:33:38 Ubuntu-PC1 sbkeysync[3929]: Inserting key update /usr/share/secureboot/updates/dbx/dbxupdate_x64.bin into dbx
Jul 26 19:33:38 Ubuntu-PC1 systemd[1]: Started unattended-upgrades.service - Unattended Upgrades Shutdown.
Jul 26 19:33:38 Ubuntu-PC1 unattended-upgrade-shutdown[4543]: /usr/share/unattended-upgrades/unattended-upgrade-shutdown:250: PyGIDeprecationWarning: GLib.unix_signal_add is deprecated; use GLibUnix.signal_add instead
Jul 26 19:33:38 Ubuntu-PC1 unattended-upgrade-shutdown[4543]: GLib.unix_signal_add(GLib.PRIORITY_DEFAULT, sig,
Jul 26 19:33:44 Ubuntu-PC1 cron[4869]: (CRON) INFO (Running @reboot jobs)
Jul 26 19:34:04 Ubuntu-PC1 systemd[5048]: Reached target gnome-session-shutdown.target - Shutdown running GNOME Session.
Jul 26 19:34:04 Ubuntu-PC1 systemd[5048]: Starting gnome-session-restart-dbus.service - Restart DBus after GNOME Session shutdown…
Jul 26 19:34:04 Ubuntu-PC1 systemd[5048]: Stopped target gnome-session-shutdown.target - Shutdown running GNOME Session.
Jul 26 19:34:04 Ubuntu-PC1 systemd[5048]: Started gnome-session-restart-dbus.service - Restart DBus after GNOME Session shutdown.
Jul 26 19:34:14 Ubuntu-PC1 systemd[5048]: Reached target shutdown.target - Shutdown.
Jul 26 20:16:03 Ubuntu-PC1 steam[40067]: Looks like steam didn’t shutdown cleanly, scheduling immediate update check
Jul 26 20:36:20 Ubunntu-PC1 kernel: secureboot: Secure boot enabled
The default in /etc/apt/apt.conf.d/50unattended-upgradesappears to be set to True if the line
//Unattended-Upgrade::Automatic-Reboot "false";
is not commented out.
This has happened to me twice at random times of the day, luckily it did not cause me to lose any data.
Relevant System Information
Brand new Ubuntu 26.04 system with all current updates and upgrades. The logs show multiple attempts to upload dbxupdate_x64.bin to NVRAM but there is not enough space triggering “Cannot allocate memory" logs.
What I’ve Tried:
uncommented Unattended-Upgrade::Automatic-Reboot “false”;
I have also disabled all current and future updates of dbx files. The constant attempts to upload may of contributed to a Kernel level event triggering unattended-upgrade-shutdown rebooting system without warning
So far so good.