[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/780625
Title:
"acpi_backlight=vendor" needs to be present in kernel cmdline to have
backlight working
Status in “linux” package in Ubuntu:
Expired
Bug description:
On my laptop I had to add "acpi_backlight=vendor" into kernel cmdline
to get working backlight. This state is since beginning (10.04 +
maverick kernels during uds-m).
If I remove that argument then /sys/class/backlight/acpi_video0/ is
created instead of 'asus_laptop' one and changing backlight by
hardware keys works randomly - pressing BacklightUp does nothing or
decrease or increase level (same with BacklightDown key).
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: linux-image-2.6.39-1-generic 2.6.39-1.6
ProcVersionSignature: Ubuntu 2.6.39-1.6-generic 2.6.39-rc6
Uname: Linux 2.6.39-1-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: hrw 2993 F.... xfce4-volumed
hrw 3012 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xfe9f4000 irq 46'
Mixer name : 'Intel Cantiga HDMI'
Components : 'HDA:10ec0269,10431443,00100004
HDA:80862802,80860101,00100000'
Controls : 15
Simple ctrls : 8
Date: Tue May 10 18:26:48 2011
HibernationDevice: RESUME=UUID=042b5e75-5bf6-43a9-b93d-957be35f77ec
MachineType: ASUSTeK Computer Inc. UL30A
ProcEnviron:
SHELL=/bin/bash
LANG=pl_PL.UTF-8
LANGUAGE=pl_PL:en
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-2.6.39-1-generic
root=/dev/mapper/hostname-rootfs ro loop.max_loop=256 acpi_backlight=vendor
loglevel=0 crashkernel=384M-2G:64M,2G-:128M quiet
RelatedPackageVersions:
linux-restricted-modules-2.6.39-1-generic N/A
linux-backports-modules-2.6.39-1-generic N/A
linux-firmware 1.52
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/28/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 212
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: UL30A
dmi.board.vendor: ASUSTeK Computer Inc.
dmi.board.version: 1.0
dmi.chassis.asset.tag: ATN12345678901234567
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr212:bd12/28/2009:svnASUSTeKComputerInc.:pnUL30A:pvr1.0:rvnASUSTeKComputerInc.:rnUL30A:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
dmi.product.name: UL30A
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.
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