Same issue here,
Asus X45A
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https://bugs.launchpad.net/bugs/1397517
Title:
Unity Screen Brightness Settings not Preserved on Reboot
Status in Unity:
Invalid
Status in gnome-power-manager package in Ubuntu:
Confirmed
Status in unity package in Ubuntu:
Invalid
Bug description:
Whenever Unity starts it sets the screen brightness to maximum, even
when the laptop is on battery. Lowering the screen brightness doesn't
persist across reboots.
To reproduce:
1. Start laptop (in this case a Lenovo Yoga 2 Pro) in battery mode (i.e.
disconnected from the AC adaptor)
2. Unity will start in maximum brightness. Lower brightness using keyboard
brightness keys.
3. Shutdown laptop and start it back up again (still with the AC adapter
disconnected)
Expected result:
The screen brightness settings should be preserved across reboots
Actual result:
After each new start Unity sets the screen brightness to maximum, meaning the
user has to remember to manually reduce it or the battery will be quickly used
up
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity 7.2.3+14.04.20140826-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-40.69-generic 3.13.11.10
Uname: Linux 3.13.0-40-generic x86_64
.tmp.unity.support.test.0:
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: amd64
CompizPlugins:
[core,bailer,detection,composite,opengl,compiztoolbox,decor,imgpng,mousepoll,vpswitch,unitymtgrabhandles,gnomecompat,regex,move,grid,place,wall,animation,snap,resize,fade,session,expo,workarounds,scale,ezoom,unityshell]
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Sat Nov 29 11:59:31 2014
DistUpgraded: Fresh install
DistroCodename: trusty
DistroVariant: ubuntu
GraphicsCard:
Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16]
(rev 0b) (prog-if 00 [VGA controller])
Subsystem: Lenovo Device [17aa:3978]
InstallationDate: Installed on 2014-09-16 (73 days ago)
InstallationMedia: Ubuntu-Server 14.04 LTS "Trusty Tahr" - Release amd64
(20140416.2)
MachineType: LENOVO 20266
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-40-generic.efi.signed
root=/dev/mapper/MainVG-root ro video.use_native_backlight=1 quiet splash
vt.handoff=7
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/25/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: 76CN35WW
dmi.board.asset.tag: No Asset Tag
dmi.board.name: Yoga2
dmi.board.vendor: LENOVO
dmi.board.version: 31900058STD
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo Yoga 2 Pro
dmi.modalias:
dmi:bvnLENOVO:bvr76CN35WW:bd03/25/2014:svnLENOVO:pn20266:pvrLenovoYoga2Pro:rvnLENOVO:rnYoga2:rvr31900058STD:cvnLENOVO:ct10:cvrLenovoYoga2Pro:
dmi.product.name: 20266
dmi.product.version: Lenovo Yoga 2 Pro
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.11.2+14.04.20140714-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.52-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.2
version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.910-0ubuntu1.3
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:1.0.10-1ubuntu2
xserver.bootTime: Fri Nov 28 23:10:38 2014
xserver.configfile: default
xserver.errors:
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
product id 16970
vendor SDC
xserver.version: 2:1.15.1-0ubuntu2.1
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