*** This bug is a duplicate of bug 1173725 ***
https://bugs.launchpad.net/bugs/1173725
well, the only thing google can find about a bios 2.25 for v5-171 is
this page, so I'm rather sure I'm on the newest bios version..
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https://bugs.launchpad.net/bugs/1324795
Title:
[Acer Aspire V5-171] backlight cannot be adjusted
Status in “linux” package in Ubuntu:
New
Bug description:
changing the backlight slider has no affect of actual screen
brightness in Ubuntu 14.04 using the 3.13.0-27-generic #50-Ubuntu
kernel, also exist on latest daily 3.15 kernel marked for trusty tahr.
apparently works if passing acpi_backlight=vendor
This is a duplicate made to be able to generate info for tracking
using ubuntu-bug. Bug is better explained in that report.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-27-generic 3.13.0-27.50
ProcVersionSignature: Ubuntu 3.13.0-27.50-generic 3.13.11
Uname: Linux 3.13.0-27-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: nisse 1491 F.... pulseaudio
CurrentDesktop: Unity
Date: Fri May 30 16:15:35 2014
HibernationDevice: RESUME=UUID=8c53c4f8-af7e-4060-9dd7-35a970de2898
InstallationDate: Installed on 2014-04-28 (31 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: Acer V5-171
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-3.13.0-27-generic.efi.signed
root=UUID=4a013521-bbb5-42f7-9c23-9d20cec1f7fd ro rootflags=subvol=@ quiet
splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.13.0-27-generic N/A
linux-backports-modules-3.13.0-27-generic N/A
linux-firmware 1.127.2
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/26/2013
dmi.bios.vendor: Acer
dmi.bios.version: V2.21
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: Mimic
dmi.board.vendor: Acer
dmi.board.version: Type2 - Board Version
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V2.21
dmi.modalias:
dmi:bvnAcer:bvrV2.21:bd11/26/2013:svnAcer:pnV5-171:pvrV2.21:rvnAcer:rnMimic:rvrType2-BoardVersion:cvnAcer:ct10:cvrV2.21:
dmi.product.name: V5-171
dmi.product.version: V2.21
dmi.sys.vendor: Acer
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