Well, have to wait for next bios update. If it help, attached you will find upower when discharging and charging, around 15 seconds between the 2 output
** Attachment added: "upower.txt" https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/1860761/+attachment/5324168/+files/upower.txt -- 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: Incomplete 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