Arne Henningsen, the next step is to fully commit bisect the kernel in
order to identify the offending commit. Could you please do this
following https://wiki.ubuntu.com/Kernel/KernelBisection ?
** Tags removed: kernel-bug-exists-upstream-3.16-rc6
** Tags added: kernel-bug-exists-upstream-3.17-rc5
** Description changed:
- I cannot change the screen brightness on my HP Elitebook 8560w. If I use the
keys for changing the screen brightness (fn + f9 or fn + f10), the on-screen
display appears and the displayed percentage changes as intended but the actual
screen brightness does not change (i.e. it remains at full brightness).
Similarly, if I do not use my computer for some time, the on-screen display
appears and indicates the the screen brightness is reduced (lower percentage)
but the actual screen brightness remains unchanged (at full brightness). I have
this computer since November 2011 and I had always the latest Kubuntu version
installed. Changing the screen brightness always worked until and including
Kubuntu 13.10. However, it stopped working when I upgraded to Kubuntu 14.04. I
have upgraded my computer's BIOS to the latest version (F.42) but this did not
help. As I also experience another bug (1337579) with Kubuntu 14.04, I have
upgraded the kernel to the upstream kernel (3.14.4-031404) and a mainline
kernel (3.16.0-031600rc6) but the bug occurs with all three kernel versions.
- ---
+ I cannot change the screen brightness on my HP Elitebook 8560w. If I use
+ the keys for changing the screen brightness (fn + f9 or fn + f10), the
+ on-screen display appears and the displayed percentage changes as
+ intended but the actual screen brightness does not change (i.e. it
+ remains at full brightness). Similarly, if I do not use my computer for
+ some time, the on-screen display appears and indicates the the screen
+ brightness is reduced (lower percentage) but the actual screen
+ brightness remains unchanged (at full brightness). I have this computer
+ since November 2011 and I had always the latest Kubuntu version
+ installed. Changing the screen brightness always worked until and
+ including Kubuntu 13.10. However, it stopped working when I upgraded to
+ Kubuntu 14.04.
+
+ ---
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
- USER PID ACCESS COMMAND
- /dev/snd/controlC1: ubuntu 3663 F.... pulseaudio
- /dev/snd/controlC0: ubuntu 3663 F.... pulseaudio
+ USER PID ACCESS COMMAND
+ /dev/snd/controlC1: ubuntu 3663 F.... pulseaudio
+ /dev/snd/controlC0: ubuntu 3663 F.... pulseaudio
CasperVersion: 1.340
CurrentDesktop: Unity
DistroRelease: Ubuntu 14.04
LiveMediaBuild: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
MachineType: Hewlett-Packard HP EliteBook 8560w
Package: linux (not installed)
ProcEnviron:
- TERM=xterm
- PATH=(custom, no user)
- XDG_RUNTIME_DIR=<set>
- LANG=en_US.UTF-8
- SHELL=/bin/bash
+ TERM=xterm
+ PATH=(custom, no user)
+ XDG_RUNTIME_DIR=<set>
+ LANG=en_US.UTF-8
+ SHELL=/bin/bash
ProcFB: 0 nouveaufb
ProcKernelCmdLine: noprompt cdrom-detect/try-usb=true persistent
file=/cdrom/preseed/username.seed boot=casper initrd=/casper/initrd.lz quiet
splash -- maybe-ubiquity
ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
RelatedPackageVersions:
- linux-restricted-modules-3.13.0-32-generic N/A
- linux-backports-modules-3.13.0-32-generic N/A
- linux-firmware 1.127.5
+ linux-restricted-modules-3.13.0-32-generic N/A
+ linux-backports-modules-3.13.0-32-generic N/A
+ linux-firmware 1.127.5
Tags: trusty
Uname: Linux 3.13.0-32-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 07/15/2013
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68SVD Ver. F.42
dmi.board.name: 1631
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 01.3D
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias:
dmi:bvnHewlett-Packard:bvr68SVDVer.F.42:bd07/15/2013:svnHewlett-Packard:pnHPEliteBook8560w:pvrA0001D02:rvnHewlett-Packard:rn1631:rvrKBCVersion01.3D:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP EliteBook 8560w
dmi.product.version: A0001D02
dmi.sys.vendor: Hewlett-Packard
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1349002
Title:
Screen brightness cannot be changed on HP EliteBook 8560w
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