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After i upgraded from win 7 to ubuntu 12.4 am facing problems regarding
display

1. i cant possible to decrease screen brightness in VAIO VPCEH25EN (Fn
F3 and Fn F4 not at all working, checked system
settings>display>brighness and all but no use) now my pc working in 100%
brightness

2. while playing HD Video contents in VLC and native video played facing
freezing of video ( no problems with codecs, downloded extra codecs) but
the problem is with rendering of these videos in the player.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: xorg 1:7.7+1ubuntu4
ProcVersionSignature: Ubuntu 3.5.0-21.32-generic 3.5.7.1
Uname: Linux 3.5.0-21-generic x86_64
.tmp.unity.support.test.1:
 
ApportVersion: 2.6.1-0ubuntu9
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
Date: Thu Dec 27 23:20:10 2012
DistUpgraded: Fresh install
DistroCodename: quantal
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 NVIDIA Corporation Device [10de:1055] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Sony Corporation Device [104d:908b]
MachineType: Sony Corporation VPCEH25EN
MarkForUpload: True
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-21-generic root=UUID=90FEDFC7FEDFA3AE loop=/hostname/disks/root.disk ro acpi_osi=Linux acpi_backlight=vendor quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/19/2012
dmi.bios.vendor: INSYDE
dmi.bios.version: R0200Z9
dmi.board.asset.tag: N/A
dmi.board.name: VAIO
dmi.board.vendor: Sony Corporation
dmi.board.version: N/A
dmi.chassis.asset.tag: N/A
dmi.chassis.type: 10
dmi.chassis.vendor: Sony Corporation
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnINSYDE:bvrR0200Z9:bd04/19/2012:svnSonyCorporation:pnVPCEH25EN:pvrC1063R1W:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
dmi.product.name: VPCEH25EN
dmi.product.version: C1063R1W
dmi.sys.vendor: Sony Corporation
version.compiz: compiz 1:0.9.8.6-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.39-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.13.0-0ubuntu6.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.99.99~git20120913.8637f772-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.9-0ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.2-0ubuntu3

** Affects: linux (Ubuntu)
     Importance: Low
         Status: Incomplete


** Tags: amd64 apport-bug compiz-0.9 latest-bios-r0200z9 quantal running-unity ubuntu
-- 
Screen brighness
https://bugs.launchpad.net/bugs/1094103
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