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Message #135701
[Bug 1315834] Re: 1002:983d [Acer Aspire V5-122P] Unable to adjust screen brightness using Radeon driver
Not Status Fix Released as defined in
https://wiki.ubuntu.com/Bugs/Status .
** Changed in: linux (Ubuntu)
Status: Fix Released => Invalid
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https://bugs.launchpad.net/bugs/1315834
Title:
1002:983d [Acer Aspire V5-122P] Unable to adjust screen brightness
using Radeon driver
Status in linux package in Ubuntu:
Invalid
Bug description:
While using the Radeon driver, I am unable to adjust the screen
brightness on my Acer Aspire V5-122P. Adjusting brightness in the
settings applet has no affect. Adjusting brightness with the keyboard
function keys turns the screen on and off seemingly randomly.
WORKAROUND: sudo -s
cd /sys/class/backlight/radeon_bl0
cat max_brightness
echo 200 > brightness #Example
echo 10 > brightness #Example
echo 255 > brightness #Example
Upstream post URL: http://www.spinics.net/lists/linux-
acpi/msg50719.html
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-24-generic 3.13.0-24.46
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: lewis 2240 F.... pulseaudio
/dev/snd/controlC0: lewis 2240 F.... pulseaudio
CurrentDesktop: Unity
Date: Sun May 4 10:55:50 2014
HibernationDevice: RESUME=UUID=42931b07-a2e1-49a1-9780-874e1d4300b7
InstallationDate: Installed on 2014-04-14 (19 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
MachineType: Acer Aspire V5-122P
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=8a594eb2-ccc3-4aa4-a4c5-e872f4033b04 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.13.0-24-generic N/A
linux-backports-modules-3.13.0-24-generic N/A
linux-firmware 1.127
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/18/2013
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: V2.08
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Aspire V5-122P
dmi.board.vendor: Acer
dmi.board.version: V2.08
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V2.08
dmi.modalias: dmi:bvnInsydeCorp.:bvrV2.08:bd07/18/2013:svnAcer:pnAspireV5-122P:pvrV2.08:rvnAcer:rnAspireV5-122P:rvrV2.08:cvnAcer:ct10:cvrV2.08:
dmi.product.name: Aspire V5-122P
dmi.product.version: V2.08
dmi.sys.vendor: Acer
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References