[HP Pavilion dv6] Brightness control only work on the last two steps on 12.04.5
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
HWE Next |
Fix Released
|
Medium
|
Alex Hung | ||
linux-lts-trusty (Ubuntu) |
Fix Released
|
Medium
|
Alex Hung |
Bug Description
CID: 201209-11641 HP Pavilion dv6 Notebook PC
Brightness control does not work on this system.
The brightness level indicator would change with hotkey events, but the brightness itself would only change with the last two steps.
Debugging information:
ubuntu@
acpi_video0 acpi_video1 intel_backlight
ubuntu@
/proc/acpi/
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ubuntu@
[ 8.457421] ACPI: Video Device [PEGP] (multi-head: yes rom: yes post: no)
[ 8.708920] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no)
ubuntu@
WORKAROUND:
Adding acpi_osi='!Windows 2012' could make it work.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-
ProcVersionSign
Uname: Linux 3.13.0-44-generic x86_64
NonfreeKernelMo
AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.13.0-44-generic.
ApportVersion: 2.0.1-0ubuntu17.8
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: 92HD91BXX Analog [92HD91BXX Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0x74610000 irq 47'
Mixer name : 'Intel PantherPoint HDMI'
Components : 'HDA:111d76e0,
Controls : 30
Simple ctrls : 12
Date: Sun Feb 1 21:21:57 2015
HibernationDevice: RESUME=
InstallationMedia: Ubuntu 12.04.5 LTS "Precise Pangolin" - Release amd64 (20140807.1)
MachineType: Hewlett-Packard HP Pavilion dv6 Notebook PC
MarkForUpload: True
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=
RelatedPackageV
linux-
linux-
linux-firmware 1.79.18
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
SourcePackage: linux-lts-trusty
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/02/2012
dmi.bios.vendor: Insyde
dmi.bios.version: F.22
dmi.board.
dmi.board.name: 181B
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 52.24
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.
dmi.modalias: dmi:bvnInsyde:
dmi.product.name: HP Pavilion dv6 Notebook PC
dmi.product.
dmi.sys.vendor: Hewlett-Packard
Changed in hwe-next: | |
status: | New → In Progress |
Changed in linux-lts-trusty (Ubuntu): | |
status: | New → In Progress |
Changed in hwe-next: | |
status: | In Progress → Confirmed |
Changed in linux-lts-trusty (Ubuntu): | |
status: | In Progress → Confirmed |
tags: | added: patch |
Changed in linux-lts-trusty (Ubuntu): | |
status: | Confirmed → Fix Committed |
Changed in hwe-next: | |
status: | Confirmed → Fix Committed |
tags: |
added: verification-done-trusty removed: verification-needed-trusty |
Changed in hwe-next: | |
status: | Fix Committed → Fix Released |
Alex, please check if the bios is incompatible with 3.13 wrt brightness.
Please note that either 12.04.2 or acpi_osi='!Windows 2012' are working fine.