the log doesn't seem to have useful clue ... could you "stop unity- settings-daemon" and lock/unlock the screen, just to see if that's also doing it without usd?
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1510344 Title: Keyboard Backlight Turns on at boot Status in Dell Sputnik: Confirmed Status in gnome-settings-daemon: Unknown Status in One Hundred Papercuts: Confirmed Status in Linux: Invalid Status in linux package in Ubuntu: Invalid Status in unity-settings-daemon package in Ubuntu: In Progress Bug description: System: Dell XPS 13 9343 Action: Boot computer Expected Behavior: Keyboard backlight would be off when computer is booted Actual Behavior: Keyboard backlight is on at boot This did not happen with Ubuntu 15.04 There are new files in Ubuntu 15.10 - /sys/class/leds/dell::kbd_backlight$ cat stop_timeout 60s cat start_triggers +keyboard +touchpad cat trigger [none] AC-online BAT0-charging-or-full BAT0-charging BAT0-full BAT0-charging-blink-full-solid usb-gadget usb-host cpu0 cpu1 cpu2 cpu3 mmc0 rfkill0 cat brightness 2 --- Unsure if these files are important, but included in the report ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: linux-image-4.1.0-2-generic 4.1.0-2.2 ProcVersionSignature: Ubuntu 4.1.0-2.2-generic 4.1.3 Uname: Linux 4.1.0-2-generic x86_64 ApportVersion: 2.18-0ubuntu5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: ubuntu 2488 F.... pulseaudio /dev/snd/controlC0: ubuntu 2488 F.... pulseaudio CasperVersion: 1.362 CurrentDesktop: Unity Date: Tue Oct 27 01:29:47 2015 IwConfig: enx00249b0981e3 no wireless extensions. lo no wireless extensions. LiveMediaBuild: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150730) MachineType: Dell Inc. XPS 13 9343 ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/username.seed boot=casper quiet splash --- cdrom-detect/try-usb=true noprompt RelatedPackageVersions: linux-restricted-modules-4.1.0-2-generic N/A linux-backports-modules-4.1.0-2-generic N/A linux-firmware 1.145 RfKill: 0: hci0: Bluetooth Soft blocked: no Hard blocked: no SourcePackage: linux UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/14/2015 dmi.bios.vendor: Dell Inc. dmi.bios.version: A05 dmi.board.name: 0TM99H dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA05:bd07/14/2015:svnDellInc.:pnXPS139343:pvr:rvnDellInc.:rn0TM99H:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: XPS 13 9343 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/dell-sputnik/+bug/1510344/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp