Public bug reported:
The boot parameter is suggested as a fix for this model by
http://www.linlap.com/acer_aspire_v5-171
(so if it would help, I would suggest classing this bug as "confirmed").
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: linux-image-3.8.0-19-generic 3.8.0-19.29 [modified:
boot/vmlinuz-3.8.0-19-generic]
ProcVersionSignature: Ubuntu 3.8.0-19.29-generic 3.8.8
Uname: Linux 3.8.0-19-generic x86_64
ApportVersion: 2.9.2-0ubuntu8
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: alan 1919 F.... pulseaudio
Date: Sat Apr 27 19:59:23 2013
InstallationDate: Installed on 2013-04-27 (0 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MachineType: Acer V5-171
MarkForUpload: True
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-19-generic.efi.signed
root=UUID=ad03cbd3-39e0-4f7e-b0ab-e1ef3abaa88e ro acpi_backlight=vendor quiet
splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.8.0-19-generic N/A
linux-backports-modules-3.8.0-19-generic N/A
linux-firmware 1.106
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/14/2012
dmi.bios.vendor: Acer
dmi.bios.version: V2.04
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: V2.04
dmi.modalias:
dmi:bvnAcer:bvrV2.04:bd09/14/2012:svnAcer:pnV5-171:pvrV2.04:rvnAcer:rnMimic:rvrType2-BoardVersion:cvnAcer:ct10:cvrV2.04:
dmi.product.name: V5-171
dmi.product.version: V2.04
dmi.sys.vendor: Acer
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug raring
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https://bugs.launchpad.net/bugs/1173725
Title:
Acer V5-171 laptop: backlight cannot be adjusted unless passing
acpi_backlight=vendor
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