** Description changed:
1) lsb_release -rd
Description: Ubuntu oneiric (development branch)
Release: 11.10
- 2) uname -r
- 3.0.0-12-generic-pae
+ 2) uname -a
+ Linux monikerpc 3.0.0-12-generic-pae #20-Ubuntu SMP Fri Oct 7 16:37:17 UTC
2011 i686 i686 i386 GNU/Linux
apt-cache policy xfce4-power-manager-plugins
xfce4-power-manager-plugins:
- Installed: 1.0.10-4
- Candidate: 1.0.10-4
- Version table:
- *** 1.0.10-4 0
- 500 http://archive.ubuntu.com/ubuntu/ oneiric/universe i386 Packages
- 100 /var/lib/dpkg/status
+ Installed: 1.0.10-4
+ Candidate: 1.0.10-4
+ Version table:
+ *** 1.0.10-4 0
+ 500 http://archive.ubuntu.com/ubuntu/ oneiric/universe i386 Packages
+ 100 /var/lib/dpkg/status
3) What is expected to happen when one presses the Fn key and the Left
or Right arrow, the brightness goes up or down respectively.
4) What happens is the brightness does not change and remains at 100% no
matter what.
WORKAROUND: Changing /etc/default/grub from:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
to:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
save, sudo update-grub then restarting allowed brightness applet or
keyboard Fn and Right or Left to change brightness.
Following the debug info
at:https://wiki.ubuntu.com/Kernel/Debugging/Backlight
this issue falls into the "Backlight control does not work, but there
are entries in /sys/class/backlight" category.
lsmod | grep thinkpad_acpi
does not yield any information.
No such path as: /proc/acpi/video
Attempting to follow: https://wiki.ubuntu.com/BIOSandUbuntu#Buggy%20DSDT
fails partially as iasl is not an available package in 11.10:
apt-cache policy iasl
N: Unable to locate package iasl
However:
sudo acpidump -o acpidump.txt && acpixtract acpidump.txt
Acpi table [DSDT] - 36436 bytes written to DSDT.dat
Acpi table [SSDT] - 3010 bytes written to SSDT1.dat
Acpi table [SSDT] - 2316 bytes written to SSDT2.dat
Acpi table [SSDT] - 2454 bytes written to SSDT3.dat
(Please see attached acpixtract.zip). Also, please see attached
results.log for sudo fwts and sudo fwts method.
Changing the "xfce4-brightness-plugin 1.0.10" to half way down goes
from:
/sys/class/backlight/intel_backlight$ grep .
/sys/class/backlight/acpi_video0/*
/sys/class/backlight/acpi_video0/actual_brightness:9
/sys/class/backlight/acpi_video0/bl_power:0
/sys/class/backlight/acpi_video0/brightness:9
/sys/class/backlight/acpi_video0/max_brightness:9
/sys/class/backlight/acpi_video0/type:firmware
to:
/sys/class/backlight/intel_backlight$ grep .
/sys/class/backlight/acpi_video0/*
/sys/class/backlight/acpi_video0/actual_brightness:5
/sys/class/backlight/acpi_video0/bl_power:0
/sys/class/backlight/acpi_video0/brightness:5
/sys/class/backlight/acpi_video0/max_brightness:9
/sys/class/backlight/acpi_video0/type:firmware
Clicking on keyboard Fn and Left arrow together once goes from:
/sys/class/backlight/intel_backlight$ grep .
/sys/class/backlight/acpi_video0/*
/sys/class/backlight/acpi_video0/actual_brightness:9
/sys/class/backlight/acpi_video0/bl_power:0
/sys/class/backlight/acpi_video0/brightness:9
/sys/class/backlight/acpi_video0/max_brightness:9
/sys/class/backlight/acpi_video0/type:firmware
to:
grep . /sys/class/backlight/acpi_video0/*
/sys/class/backlight/acpi_video0/actual_brightness:7
/sys/class/backlight/acpi_video0/bl_power:0
/sys/class/backlight/acpi_video0/brightness:7
/sys/class/backlight/acpi_video0/max_brightness:9
/sys/class/backlight/acpi_video0/type:firmware
dmesg|grep 'ACPI: Video'
[ 4.181103] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no)
lspci |grep VGA
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core
Processor Family Integrated Graphics Controller (rev 09)
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: linux-image-3.0.0-12-generic-pae 3.0.0-12.19
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic-pae 3.0.4
Uname: Linux 3.0.0-12-generic-pae i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.23-0ubuntu2
Architecture: i386
ArecordDevices:
- **** List of CAPTURE Hardware Devices ****
- card 0: PCH [HDA Intel PCH], device 0: ALC269VB Analog [ALC269VB Analog]
- Subdevices: 1/1
- Subdevice #0: subdevice #0
+ **** List of CAPTURE Hardware Devices ****
+ card 0: PCH [HDA Intel PCH], device 0: ALC269VB Analog [ALC269VB Analog]
+ Subdevices: 1/1
+ Subdevice #0: subdevice #0
AudioDevicesInUse:
- USER PID ACCESS COMMAND
- /dev/snd/controlC0: moniker 1750 F.... xfce4-volumed
- moniker 1798 F.... pulseaudio
+ USER PID ACCESS COMMAND
+ /dev/snd/controlC0: moniker 1750 F.... xfce4-volumed
+ moniker 1798 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
- Card hw:0 'PCH'/'HDA Intel PCH at 0xc0700000 irq 50'
- Mixer name : 'Intel CougarPoint HDMI'
- Components : 'HDA:10ec0269,10250504,00100100
HDA:80862805,80860101,00100000'
- Controls : 20
- Simple ctrls : 11
+ Card hw:0 'PCH'/'HDA Intel PCH at 0xc0700000 irq 50'
+ Mixer name : 'Intel CougarPoint HDMI'
+ Components : 'HDA:10ec0269,10250504,00100100
HDA:80862805,80860101,00100000'
+ Controls : 20
+ Simple ctrls : 11
Date: Fri Sep 30 06:05:13 2011
EcryptfsInUse: Yes
InstallationMedia: Xubuntu 11.10 "Oneiric Ocelot" - Beta i386 (20110921.3)
MachineType: Acer Aspire 5750
ProcEnviron:
- LANG=en_US.UTF-8
- SHELL=/bin/bash
+ LANG=en_US.UTF-8
+ SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic-pae
root=UUID=af001e50-f2b3-44af-a197-164b20aa8c44 ro quiet splash vt.handoff=7
RelatedPackageVersions:
- linux-restricted-modules-3.0.0-12-generic-pae N/A
- linux-backports-modules-3.0.0-12-generic-pae N/A
- linux-firmware 1.60
+ linux-restricted-modules-3.0.0-12-generic-pae N/A
+ linux-backports-modules-3.0.0-12-generic-pae N/A
+ linux-firmware 1.60
RfKill:
- 0: phy0: Wireless LAN
- Soft blocked: no
- Hard blocked: no
+ 0: phy0: Wireless LAN
+ Soft blocked: no
+ Hard blocked: no
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/11/2011
dmi.bios.vendor: Acer
dmi.bios.version: V1.05
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: JE50_HR
dmi.board.vendor: Acer
dmi.board.version: Base Board Version
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.05
dmi.modalias:
dmi:bvnAcer:bvrV1.05:bd02/11/2011:svnAcer:pnAspire5750:pvrV1.05:rvnAcer:rnJE50_HR:rvrBaseBoardVersion:cvnAcer:ct10:cvrV1.05:
dmi.product.name: Aspire 5750
dmi.product.version: V1.05
dmi.sys.vendor: Acer
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Tags removed: kernel-request-3.0.0-12.20
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https://bugs.launchpad.net/bugs/863156
Title:
Brightness unchangeable via keyboard or brightness applet Acer Aspire
5750-9668
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