As discussed on IRC with Tobias, UPower appears to ignore our ‘critical-power-action’ setting. On my machine, I left the default (‘HybridSleep’) but upowerd dismisses it and chooses ‘PowerOff’: --8<---------------cut here---------------start------------->8--- $ guix system describe Generation 198 Aug 29 2022 00:47:53 (current) file name: /var/guix/profiles/system-198-link canonical file name: /gnu/store/85441w3nzqv8lg04gm7601wi9np4qlw7-system label: GNU with Linux-Libre 5.18.19 bootloader: grub-efi root device: label: "root" kernel: /gnu/store/a43ai5qi4vbgm2zywg4b60y71d7whccn-linux-libre-5.18.19/bzImage channels: guix: repository URL: https://git.savannah.gnu.org/git/guix.git branch: master commit: 3294fa2ba451c7d5ef42a5d9fac780877f364bc7 configuration file: /gnu/store/lmqb5d0il8zydd0p0vz4kviaq1qg4n9m-configuration.scm $ upower -d | tail -6 Daemon: daemon-version: 0.99.15 on-battery: no lid-is-closed: no lid-is-present: yes critical-action: PowerOff $ sudo herd status upower-daemon Status of upower-daemon: It is started. Running value is 338. It is enabled. Provides (upower-daemon). Requires (dbus-system udev). Conflicts with (). Will be respawned. $ sudo cat /proc/338/environ |xargs -0 PWD=/ UPOWER_CONF_FILE_NAME=/gnu/store/yq6zf8q2l2axy03d99pami3sxrk4784y-UPower.conf SHLVL=0 XDG_DATA_DIRS=/gnu/store/bnsf9il448hl5xjavbhq3rcx355svz2v-glib-2.70.2/share $ cat /gnu/store/yq6zf8q2l2axy03d99pami3sxrk4784y-UPower.conf |grep Critical PercentageCritical=3 TimeCritical=300 CriticalPowerAction=HybridSleep --8<---------------cut here---------------end--------------->8--- Looking at the code, it could be because the ‘CanHybridSleep’ method returns false, but why that would happen is unknown to me. Thoughts? Ludo’.