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Message #165547
[Bug 1510344] Re: Keyboard Backlight Turns on at boot
similar with dall precision m4600 ubuntu 14.04, kernel 4.2.0. keyboard
backlight is turned on when power state changing (plug in, unplug, turn
on). it started after i upgrade kernel to version 4.2.0. earlier i was
using kernel 3.x (don't remember the exact version) and there was no
problem with keyboard backlight
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https://bugs.launchpad.net/bugs/1510344
Title:
Keyboard Backlight Turns on at boot
Status in Dell Sputnik:
Confirmed
Status in One Hundred Papercuts:
Confirmed
Status in linux package in Ubuntu:
Confirmed
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
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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.
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References