I have had the same problem since I got my XPS 7390, and I have the same problem. I just found this report and will try Daniel's fix ASAP (actually, my laptop has been charging all night, so I hope it will work). However, just before I do, here is the output of the two commands required by Sebastien.
$ upower -d Device: /org/freedesktop/UPower/devices/line_power_AC native-path: AC power supply: yes updated: mar. 07 avril 2020 06:49:37 CEST (59 seconds ago) has history: no has statistics: no line-power warning-level: none online: yes icon-name: 'ac-adapter-symbolic' Device: /org/freedesktop/UPower/devices/battery_BAT0 native-path: BAT0 vendor: SMP model: DELL G8VCF6C serial: 1225 power supply: yes updated: mar. 07 avril 2020 06:49:37 CEST (59 seconds ago) has history: yes has statistics: yes battery present: yes rechargeable: yes state: fully-charged warning-level: none energy: 48,8832 Wh energy-empty: 0 Wh energy-full: 49,4 Wh energy-full-design: 51,9992 Wh energy-rate: 4,104 W voltage: 8,637 V percentage: 98% capacity: 95,0015% technology: lithium-polymer icon-name: 'battery-full-charged-symbolic' History (charge): 1586234977 98,000 discharging History (rate): 1586234977 4,104 fully-charged 1586234977 6,492 discharging Device: /org/freedesktop/UPower/devices/DisplayDevice power supply: yes updated: mar. 07 avril 2020 06:49:37 CEST (59 seconds ago) has history: no has statistics: no battery present: yes state: fully-charged warning-level: none energy: 48,8832 Wh energy-full: 49,4 Wh energy-rate: 4,104 W percentage: 98% icon-name: 'battery-full-charged-symbolic' Daemon: daemon-version: 0.99.11 on-battery: no lid-is-closed: no lid-is-present: yes critical-action: PowerOff $ journalctl -b 0 >/tmp/journalctl.out (see attached file) ** Attachment added: "output of journalctl -b 0" https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/1860761/+attachment/5348325/+files/journalctl.out -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-software in Ubuntu. https://bugs.launchpad.net/bugs/1860761 Title: Dell XPS 13 - Bios upgrade not working - Always ask for power supply Status in gnome-software package in Ubuntu: Expired Bug description: Each time the notebook starts I'm advised that a new bios upgrade is out: XPS 13 7390 System Update 0.1.3.1 => 0.1.4.0 Problem is that when I ask for update, I always get this message (traduction from french): Not possible to upgrade "XPS 13 7390 System Update": connect power supply. Battery can be full, notebook connected on power supply, doesn't matter, will not upgrade. Daniel Ubuntu 18.04.3 LTS ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: ubuntu-software 3.28.1-0ubuntu4.18.04.14 ProcVersionSignature: Ubuntu 4.15.0-1066.76-oem 4.15.18 Uname: Linux 4.15.0-1066-oem x86_64 ApportVersion: 2.20.9-0ubuntu7.9 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Fri Jan 24 09:15:31 2020 DistributionChannelDescriptor: # This is the distribution channel descriptor for the OEM CDs # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor canonical-oem-somerville-bionic-amd64-20180608-47+beaver-three-eyed-raven+X92 InstallationDate: Installed on 2019-12-07 (47 days ago) InstallationMedia: Ubuntu 18.04 "Bionic" - Build amd64 LIVE Binary 20180608-09:38 InstalledPlugins: gnome-software-plugin-flatpak N/A gnome-software-plugin-limba N/A gnome-software-plugin-snap 3.28.1-0ubuntu4.18.04.14 PackageArchitecture: all ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=fr_FR.UTF-8 SHELL=/bin/bash SourcePackage: gnome-software UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/1860761/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp