Public bug reported:

Encountered that after screen is turned off by inactivity, then after
restoring, its brightness was very dim. After looking into "Brightness
and lock" settings panel, discovered that "Brightness" was set to 0.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity 7.2.0+14.04.20140416-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
.tmp.unity.support.test.0:
 
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Mon Apr 21 13:51:45 2014
DistUpgraded: 2014-04-18 14:17:57,332 DEBUG enabling apt cron job
DistroCodename: trusty
DistroVariant: ubuntu
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] RV710/M92 [Mobility Radeon HD 
4530/4570/545v] [1002:9553] (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:21bb]
InstallationDate: Installed on 2013-10-23 (180 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
MachineType: LENOVO 4403RP2
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic 
root=UUID=1caa7d75-3528-4d6a-a5b2-696009d4b990 ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: Upgraded to trusty on 2014-04-18 (2 days ago)
dmi.bios.date: 12/08/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 81ET60WW (1.36 )
dmi.board.name: 4403RP2
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: 
dmi:bvnLENOVO:bvr81ET60WW(1.36):bd12/08/2011:svnLENOVO:pn4403RP2:pvrThinkPadL412:rvnLENOVO:rn4403RP2:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4403RP2
dmi.product.version: ThinkPad L412
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.11+14.04.20140409-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.52-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.0-4ubuntu5
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.0-4ubuntu5
version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2
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
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
xserver.bootTime: Mon Apr 21 12:01:33 2014
xserver.configfile: default
xserver.errors:
 
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.15.1-0ubuntu2
xserver.video_driver: radeon

** Affects: unity (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug compiz-0.9 third-party-packages trusty ubuntu

** Attachment added: "Screenshot - 21.04.2014 - 13:56:01.png"
   
https://bugs.launchpad.net/bugs/1310540/+attachment/4090828/+files/Screenshot%20-%2021.04.2014%20-%2013%3A56%3A01.png

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https://bugs.launchpad.net/bugs/1310540

Title:
  Screen brightness not restored after turning screen off (by
  inactivity)

Status in “unity” package in Ubuntu:
  New

Bug description:
  Encountered that after screen is turned off by inactivity, then after
  restoring, its brightness was very dim. After looking into "Brightness
  and lock" settings panel, discovered that "Brightness" was set to 0.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: unity 7.2.0+14.04.20140416-0ubuntu1
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: Unity
  Date: Mon Apr 21 13:51:45 2014
  DistUpgraded: 2014-04-18 14:17:57,332 DEBUG enabling apt cron job
  DistroCodename: trusty
  DistroVariant: ubuntu
  GraphicsCard:
   Advanced Micro Devices, Inc. [AMD/ATI] RV710/M92 [Mobility Radeon HD 
4530/4570/545v] [1002:9553] (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:21bb]
  InstallationDate: Installed on 2013-10-23 (180 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 
(20131016.1)
  MachineType: LENOVO 4403RP2
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic 
root=UUID=1caa7d75-3528-4d6a-a5b2-696009d4b990 ro quiet splash vt.handoff=7
  SourcePackage: unity
  UpgradeStatus: Upgraded to trusty on 2014-04-18 (2 days ago)
  dmi.bios.date: 12/08/2011
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 81ET60WW (1.36 )
  dmi.board.name: 4403RP2
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: 
dmi:bvnLENOVO:bvr81ET60WW(1.36):bd12/08/2011:svnLENOVO:pn4403RP2:pvrThinkPadL412:rvnLENOVO:rn4403RP2:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 4403RP2
  dmi.product.version: ThinkPad L412
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.11+14.04.20140409-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.52-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.0-4ubuntu5
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.0-4ubuntu5
  version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2
  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
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:1.0.10-1ubuntu2
  xserver.bootTime: Mon Apr 21 12:01:33 2014
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.15.1-0ubuntu2
  xserver.video_driver: radeon

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