Public bug reported:
I use this laptop since 10.04 and I always have to write something into
/etc/default/grub, to solve this problem.
Now on precise it is properly working if I write "acpi_backlight=vendor" to
this line:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
Is it possible to fix this bug, to work the brightness change out of the box?
I really hope it is.
It doesn't work since 2009.06.27.
These are the bugs which is connected to this problem:
https://bugs.launchpad.net/ubuntu/+source/acpid/+bug/392948
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/489041
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/518002
https://bugs.launchpad.net/ubuntu/+bug/773820
I hope I attached everything which necessary, if not please let me know what I
should send.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-17-generic-pae 3.2.0-17.27
ProcVersionSignature: Ubuntu 3.2.0-17.27-generic-pae 3.2.6
Uname: Linux 3.2.0-17-generic-pae i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.93-0ubuntu2
Architecture: i386
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: lukibeni 1665 F.... pulseaudio
/dev/snd/pcmC0D0p: lukibeni 1665 F...m pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf0700000 irq 45'
Mixer name : 'Conexant CX20561 (Hermosa)'
Components : 'HDA:14f15051,10250253,00100000'
Controls : 18
Simple ctrls : 12
Date: Sun Feb 26 09:19:11 2012
HibernationDevice: RESUME=UUID=9e4f77a4-98e9-48ec-97e5-07dc5ae08872
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20120201.1)
MachineType: Acer Extensa 5235
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=hu_HU.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-17-generic-pae
root=UUID=5b2cd82c-58ab-45e6-9719-02f98b6c857b ro quiet splash
acpi_backlight=vendor vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.2.0-17-generic-pae N/A
linux-backports-modules-3.2.0-17-generic-pae N/A
linux-firmware 1.71
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/09/2009
dmi.bios.vendor: Phoenix
dmi.bios.version: V0.3216
dmi.board.name: BA50-MV
dmi.board.vendor: Acer
dmi.board.version: Not Applicable
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: N/A
dmi.modalias:
dmi:bvnPhoenix:bvrV0.3216:bd06/09/2009:svnAcer:pnExtensa5235:pvrNotApplicable:rvnAcer:rnBA50-MV:rvrNotApplicable:cvnAcer:ct10:cvrN/A:
dmi.product.name: Extensa 5235
dmi.product.version: Not Applicable
dmi.sys.vendor: Acer
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 precise
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https://bugs.launchpad.net/bugs/941286
Title:
Setting brightness doesn't work out of the box on Acer Extensa 5235
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