@seb128: I tested with usd stopped per your recommendation and problem #2 as I described my reproducer above doesn't hapen.
@marco: I see how that patch could help and where you are going with this, but unfortunately that doesn't do the trick. There are no events from either gdbus monitor or udevadvm monitor when the keys are pressed. During a lock cycle after the display turns off I get this output: t@t-XPS-13-9350:~$ gdbus monitor --system --dest org.freedesktop.UPower Monitoring signals from all objects owned by org.freedesktop.UPower The name org.freedesktop.UPower is owned by :1.57 /org/freedesktop/UPower/KbdBacklight: org.freedesktop.UPower.KbdBacklight.BrightnessChanged (0,) /org/freedesktop/UPower/KbdBacklight: org.freedesktop.UPower.KbdBacklight.BrightnessChanged (2,) Nothing from udevadm monitor. I am able to cat /sys/devices/platform/dell- laptop/leds/dell::kbd_backlight at any time and get the right value that reflects what the keys were set to. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to unity-settings-daemon 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: Fix Released Status in One Hundred Papercuts: Confirmed Status in Linux: 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/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

