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.
** Changed in: linux-lts-trusty (Ubuntu)
Assignee: Anthony Wong (anthonywong) => Alex Hung (alexhung)
** Changed in: hwe-next
Assignee: (unassigned) => Alex Hung (alexhung)
** Changed in: hwe-next
Importance: Undecided => Medium
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https://bugs.launchpad.net/bugs/1416940
Title:
[HP Pavilion dv6] Brightness control only work on the last two steps
on 12.04.5
Status in HWE Next Project:
New
Status in linux-lts-trusty package in Ubuntu:
New
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@201209-11641:~$ ls /sys/class/backlight
acpi_video0 acpi_video1 intel_backlight
ubuntu@201209-11641:~$ grep -r . /proc/acpi
/proc/acpi/bbswitch:0000:01:00.0 ON
/proc/acpi/battery/BAT0/alarm:alarm: unsupported
/proc/acpi/battery/BAT0/state:present: yes
/proc/acpi/battery/BAT0/state:capacity state: ok
/proc/acpi/battery/BAT0/state:charging state: charged
/proc/acpi/battery/BAT0/state:present rate: 0 mA
/proc/acpi/battery/BAT0/state:remaining capacity: 4878 mAh
/proc/acpi/battery/BAT0/state:present voltage: 12642 mV
/proc/acpi/battery/BAT0/info:present: yes
/proc/acpi/battery/BAT0/info:design capacity: 4878 mAh
/proc/acpi/battery/BAT0/info:last full capacity: 4878 mAh
/proc/acpi/battery/BAT0/info:battery technology: rechargeable
/proc/acpi/battery/BAT0/info:design voltage: 11100 mV
/proc/acpi/battery/BAT0/info:design capacity warning: 672 mAh
/proc/acpi/battery/BAT0/info:design capacity low: 456 mAh
/proc/acpi/battery/BAT0/info:cycle count: 0
/proc/acpi/battery/BAT0/info:capacity granularity 1: 216 mAh
/proc/acpi/battery/BAT0/info:capacity granularity 2: 4206 mAh
/proc/acpi/battery/BAT0/info:model number: MO06062
/proc/acpi/battery/BAT0/info:serial number: 133
/proc/acpi/battery/BAT0/info:battery type: LION
/proc/acpi/battery/BAT0/info:OEM info: 12-32
/proc/acpi/button/lid/LID0/state:state: open
/proc/acpi/ac_adapter/ADP1/state:state: on-line
/proc/acpi/wakeup:Device S-state Status Sysfs node
/proc/acpi/wakeup:P0P1 S4 *disabled
/proc/acpi/wakeup:KBD0 S3 *enabled pnp:00:07
/proc/acpi/wakeup:PS2M S3 *disabled pnp:00:08
/proc/acpi/wakeup:EHC1 S3 *enabled pci:0000:00:1d.0
/proc/acpi/wakeup:EHC2 S3 *enabled pci:0000:00:1a.0
/proc/acpi/wakeup:XHC S3 *enabled pci:0000:00:14.0
/proc/acpi/wakeup:HDEF S0 *disabled pci:0000:00:1b.0
/proc/acpi/wakeup:RP01 S4 *disabled pci:0000:00:1c.0
/proc/acpi/wakeup:PXSX S4 *disabled
/proc/acpi/wakeup:RP02 S4 *disabled
/proc/acpi/wakeup:PXSX S4 *disabled
/proc/acpi/wakeup:RP03 S4 *disabled pci:0000:00:1c.2
/proc/acpi/wakeup:PXSX S4 *disabled pci:0000:08:00.0
/proc/acpi/wakeup:RP04 S4 *disabled pci:0000:00:1c.3
/proc/acpi/wakeup:PXSX S4 *disabled pci:0000:0a:00.0
/proc/acpi/wakeup:RP05 S4 *disabled
/proc/acpi/wakeup:PXSX S4 *disabled
/proc/acpi/wakeup:RP06 S5 *disabled pci:0000:00:1c.5
/proc/acpi/wakeup:PXSX S5 *enabled pci:0000:0b:00.0
/proc/acpi/wakeup:RP07 S4 *disabled
/proc/acpi/wakeup:PXSX S4 *disabled
/proc/acpi/wakeup:RP08 S4 *disabled
/proc/acpi/wakeup:PXSX S4 *disabled
/proc/acpi/wakeup:PEG0 S4 *disabled pci:0000:00:01.0
/proc/acpi/wakeup:PEGP S4 *disabled pci:0000:01:00.0
/proc/acpi/wakeup:PEG1 S4 *disabled
/proc/acpi/wakeup:PEG2 S4 *disabled
/proc/acpi/wakeup:PEG3 S4 *disabled
/proc/acpi/wakeup:LID0 S3 *enabled
ubuntu@201209-11641:~$ dmesg | grep 'ACPI: Video'
[ 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@201209-11641:~$
WORKAROUND:
Adding acpi_osi='!Windows 2012' could make it work.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.13.0-44-generic 3.13.0-44.73~precise1
ProcVersionSignature: Ubuntu 3.13.0-44.73~precise1-generic 3.13.11-ckt12
Uname: Linux 3.13.0-44-generic x86_64
NonfreeKernelModules: nvidia
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/controlC0: ubuntu 2121 F.... pulseaudio
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:111d76e0,103c181b,00100102
HDA:80862806,103c1818,00100000'
Controls : 30
Simple ctrls : 12
Date: Sun Feb 1 21:21:57 2015
HibernationDevice: RESUME=UUID=44133aff-4b56-4bb1-bd96-812df1f33e5c
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=/boot/vmlinuz-3.13.0-44-generic
root=UUID=a8ad3f48-e182-468f-b168-3a16c8cc9536 ro quiet splash
RelatedPackageVersions:
linux-restricted-modules-3.13.0-44-generic N/A
linux-backports-modules-3.13.0-44-generic N/A
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.asset.tag: Type2 - Board Asset Tag
dmi.board.name: 181B
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 52.24
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias:
dmi:bvnInsyde:bvrF.22:bd11/02/2012:svnHewlett-Packard:pnHPPaviliondv6NotebookPC:pvr0791100200004710000620100:rvnHewlett-Packard:rn181B:rvr52.24:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP Pavilion dv6 Notebook PC
dmi.product.version: 0791100200004710000620100
dmi.sys.vendor: Hewlett-Packard
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