*** This bug is a duplicate of bug 1163720 ***
https://bugs.launchpad.net/bugs/1163720
I t could be the same problem reported here:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1229591
For me is still present in 15.04
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https://bugs.launchpad.net/bugs/1166495
Title:
Brightness fn keys don't work on dell xps 13 ultrabook
Status in linux package in Ubuntu:
Confirmed
Bug description:
Have found this bug with the last few kernels in raring ringtail with
my dell xps 13 ultrabook. Neither of the fn keys for brightness
work... very frustrating! This seems to be a regression in the kernel,
so I have marked this as an issue with the linux-header-kernel
packages.
When I boot the computer I have this issue, as well as when the screen
times out, or when I wake from suspend. The screen is stuck on 100%
brightness. I have created a simple 'brightness-fix' script which I've
put in /usr/local/bin, and run as root whenever I need to have the
brightness less than 100%. I haven't looked to implment a better
workaround, as I'm hoping for a more permanent fix from the kernel
devs. My script for this is below:
---- code ----
#!/bin/bash
#FIx for brightness control:
echo 0 > /sys/class/backlight/intel_backlight/brightness
---- end code ----
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: linux-headers-3.8.0-17 3.8.0-17.27
ProcVersionSignature: Ubuntu 3.8.0-17.27-generic 3.8.6
Uname: Linux 3.8.0-17-generic x86_64
ApportVersion: 2.9.2-0ubuntu5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: mitchell 2039 F.... pulseaudio
Date: Tue Apr 9 07:56:50 2013
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=44202eef-4580-4844-9e5e-17436f2d39bd
InstallationDate: Installed on 2013-03-27 (12 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130326)
MachineType: Dell Inc. Dell System XPS L321X
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
LANGUAGE=en_AU:en
TERM=xterm
PATH=(custom, no user)
LANG=en_AU.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.8.0-17-generic
root=UUID=89891af3-60e2-4cb3-90e6-3280208bf5b9 ro quiet splash vt.handoff=7
PulseList:
Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not
accessible: Permission denied
No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-3.8.0-17-generic N/A
linux-backports-modules-3.8.0-17-generic N/A
linux-firmware 1.104
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/14/2012
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A07
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 0.1
dmi.modalias:
dmi:bvnDellInc.:bvrA07:bd08/14/2012:svnDellInc.:pnDellSystemXPSL321X:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct8:cvr0.1:
dmi.product.name: Dell System XPS L321X
dmi.sys.vendor: Dell Inc.
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