** Summary changed:
- Backlight controls not working on HP Elitebook 850 G1
+ [HP EliteBook 850 G1 Notebook PC] Backlight controls not working
** Tags added: latest-bios-1.08
** Tags added: kernel-fixed-upstream
** Description changed:
Backlight control does not work, but there are entries in
/sys/class/backlight.
- This is a new laptop, I have not tried any previous kernel versions.
- Hotkeys do not change the brightness but do cause the OSD to pop up
indicating what the brightness should be.
- Brightness applet does not work.
+ This is a new laptop, I have not tried any previous kernel versions. Hotkeys
do not change the brightness but do cause the OSD to pop up indicating what the
brightness should be. Brightness applet does not work.
+
+ WORKAROUND: Adding the kernel parameter "acpi_backlight=vendor" now
+ allows both the hotkeys and the brightness applet to modify the
+ brightness.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-19-generic 3.13.0-19.39
ProcVersionSignature: Ubuntu 3.13.0-19.39-generic 3.13.6
Uname: Linux 3.13.0-19-generic x86_64
ApportVersion: 2.13.3-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
- USER PID ACCESS COMMAND
- /dev/snd/controlC1: useradmin 3496 F.... pulseaudio
- /dev/snd/controlC0: useradmin 3496 F.... pulseaudio
+ USER PID ACCESS COMMAND
+ /dev/snd/controlC1: useradmin 3496 F.... pulseaudio
+ /dev/snd/controlC0: useradmin 3496 F.... pulseaudio
CurrentDesktop: GNOME
Date: Sat Mar 22 22:52:23 2014
HibernationDevice: RESUME=UUID=a3e237f6-10cb-43a3-b9ed-ecfbc16de751
InstallationDate: Installed on 2014-03-22 (1 days ago)
InstallationMedia: Ubuntu-GNOME 14.04 "Trusty Tahr" - Alpha amd64 (20140226)
MachineType: Hewlett-Packard HP EliteBook 850 G1
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-19-generic
root=UUID=1209f2bc-bc3e-44ae-bf60-8c0bcb5cfb1e ro access=m2 quiet splash
RelatedPackageVersions:
- linux-restricted-modules-3.13.0-19-generic N/A
- linux-backports-modules-3.13.0-19-generic N/A
- linux-firmware 1.126
+ linux-restricted-modules-3.13.0-19-generic N/A
+ linux-backports-modules-3.13.0-19-generic N/A
+ linux-firmware 1.126
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/19/2014
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: L71 Ver. 01.08
dmi.board.name: 198F
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 15.54
dmi.chassis.asset.tag: CNU345C1WF
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias:
dmi:bvnHewlett-Packard:bvrL71Ver.01.08:bd02/19/2014:svnHewlett-Packard:pnHPEliteBook850G1:pvrA3009DD10303:rvnHewlett-Packard:rn198F:rvrKBCVersion15.54:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP EliteBook 850 G1
dmi.product.version: A3009DD10303
dmi.sys.vendor: Hewlett-Packard
** Changed in: linux (Ubuntu)
Importance: Medium => Low
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Summary changed:
- [HP EliteBook 850 G1 Notebook PC] Backlight controls not working
+ 8086:0a16 [HP EliteBook 850 G1 Notebook PC] Backlight controls not working
--
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/1296208
Title:
8086:0a16 [HP EliteBook 850 G1 Notebook PC] Backlight controls not
working
Status in “linux” package in Ubuntu:
Confirmed
Bug description:
Backlight control does not work, but there are entries in
/sys/class/backlight.
This is a new laptop, I have not tried any previous kernel versions. Hotkeys
do not change the brightness but do cause the OSD to pop up indicating what the
brightness should be. Brightness applet does not work.
WORKAROUND: Adding the kernel parameter "acpi_backlight=vendor" now
allows both the hotkeys and the brightness applet to modify the
brightness.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-19-generic 3.13.0-19.39
ProcVersionSignature: Ubuntu 3.13.0-19.39-generic 3.13.6
Uname: Linux 3.13.0-19-generic x86_64
ApportVersion: 2.13.3-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: useradmin 3496 F.... pulseaudio
/dev/snd/controlC0: useradmin 3496 F.... pulseaudio
CurrentDesktop: GNOME
Date: Sat Mar 22 22:52:23 2014
HibernationDevice: RESUME=UUID=a3e237f6-10cb-43a3-b9ed-ecfbc16de751
InstallationDate: Installed on 2014-03-22 (1 days ago)
InstallationMedia: Ubuntu-GNOME 14.04 "Trusty Tahr" - Alpha amd64 (20140226)
MachineType: Hewlett-Packard HP EliteBook 850 G1
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-19-generic
root=UUID=1209f2bc-bc3e-44ae-bf60-8c0bcb5cfb1e ro access=m2 quiet splash
RelatedPackageVersions:
linux-restricted-modules-3.13.0-19-generic N/A
linux-backports-modules-3.13.0-19-generic N/A
linux-firmware 1.126
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/19/2014
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: L71 Ver. 01.08
dmi.board.name: 198F
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 15.54
dmi.chassis.asset.tag: CNU345C1WF
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias:
dmi:bvnHewlett-Packard:bvrL71Ver.01.08:bd02/19/2014:svnHewlett-Packard:pnHPEliteBook850G1:pvrA3009DD10303:rvnHewlett-Packard:rn198F:rvrKBCVersion15.54:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP EliteBook 850 G1
dmi.product.version: A3009DD10303
dmi.sys.vendor: Hewlett-Packard
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