This is a system installed with latest stable 12.04.5 image.
The Brightness key will invoke the osd-notify indicator but the display brightness won't change.
Verifying the value changing in backlight interface, system are using acpi_video0 instead:
Steps to monitor the backlight interfaces:
Press the brightness key until maxium indicator shows:
ubuntu@201210-11863:/sys/class/backlight$ cat intel_backlight/brightness ; cat acpi_video0/brightness 3407 99 ubuntu@201210-11863:/sys/class/backlight$
Press the brightness key until to minimum indicator shows:
ubuntu@201210-11863:/sys/class/backlight$ cat intel_backlight/brightness ; cat acpi_video0/brightness 3407 0
ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: xorg 1:7.6+12ubuntu2 ProcVersionSignature: Ubuntu 3.13.0-32.57~precise1-generic 3.13.11.4 Uname: Linux 3.13.0-32-generic x86_64 .tmp.unity.support.test.0:
ApportVersion: 2.0.1-0ubuntu17.6 Architecture: amd64 CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell] CompositorRunning: compiz Date: Fri Aug 8 03:51:43 2014 DistUpgraded: Fresh install DistroCodename: precise DistroVariant: ubuntu DkmsStatus: fwts-efi-runtime-dkms, 14.07.00, 3.13.0-32-generic, x86_64: installed ExtraDebuggingInterest: Yes, even including gdb or git bisection work if needed GraphicsCard: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Dell Device [1028:05ba] Advanced Micro Devices, Inc. [AMD/ATI] Mars [Radeon HD 8730M] [1002:6601] (rev ff) (prog-if ff) InstallationMedia: Ubuntu 12.04.5 LTS "Precise Pangolin" - Release amd64 (20140807.1) MachineType: Dell Inc. Inspiron 5721 MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-32-generic root=UUID=93a24f68-72a1-4335-938a-75f624f57e68 ro quiet splash initcall_debug vt.handoff=7 SourcePackage: xorg UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/25/2013 dmi.bios.vendor: Dell Inc. dmi.bios.version: A12 dmi.board.name: 0KNF68 dmi.board.vendor: Dell Inc. dmi.board.version: X01 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: A12 dmi.modalias: dmi:bvnDellInc.:bvrA12:bd10/25/2013:svnDellInc.:pnInspiron5721:pvrA12:rvnDellInc.:rn0KNF68:rvrX01:cvnDellInc.:ct8:cvrA12: dmi.product.name: Inspiron 5721 dmi.product.version: A12 dmi.sys.vendor: Dell Inc. version.compiz: compiz 1:0.9.7.12-0ubuntu4 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.52-1~precise1 version.libgl1-mesa-dri: libgl1-mesa-dri N/A version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core N/A version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
This is a system installed with latest stable 12.04.5 image.
The Brightness key will invoke the osd-notify indicator but the display brightness won't change.
Verifying the value changing in backlight interface, system are using acpi_video0 instead:
Steps to monitor the backlight interfaces:
Press the brightness key until maxium indicator shows:
ubuntu@ 201210- 11863:/ sys/class/ backlight$ cat intel_backlight /brightness ; cat acpi_video0/ brightness 201210- 11863:/ sys/class/ backlight$
3407
99
ubuntu@
Press the brightness key until to minimum indicator shows:
ubuntu@ 201210- 11863:/ sys/class/ backlight$ cat intel_backlight /brightness ; cat acpi_video0/ brightness
3407
0
ProblemType: Bug ature: Ubuntu 3.13.0- 32.57~precise1- generic 3.13.11.4 support. test.0:
DistroRelease: Ubuntu 12.04
Package: xorg 1:7.6+12ubuntu2
ProcVersionSign
Uname: Linux 3.13.0-32-generic x86_64
.tmp.unity.
ApportVersion: 2.0.1-0ubuntu17.6 ,opengl, compiztoolbox, decor,vpswitch, snap,mousepoll, resize, place,move, wall,grid, regex,imgpng, session, gnomecompat, animation, fade,unitymtgra bhandles, workarounds, scale,expo, ezoom,unityshel l] runtime- dkms, 14.07.00, 3.13.0-32-generic, x86_64: installed nterest: Yes, even including gdb or git bisection work if needed /boot/vmlinuz- 3.13.0- 32-generic root=UUID= 93a24f68- 72a1-4335- 938a-75f624f57e 68 ro quiet splash initcall_debug vt.handoff=7 version: A12 :bvrA12: bd10/25/ 2013:svnDellInc .:pnInspiron572 1:pvrA12: rvnDellInc. :rn0KNF68: rvrX01: cvnDellInc. :ct8:cvrA12: version: A12 libgl1- mesa-dri: libgl1-mesa-dri N/A libgl1- mesa-dri- experimental: libgl1- mesa-dri- experimental N/A libgl1- mesa-glx: libgl1-mesa-glx N/A xserver- xorg-core: xserver-xorg-core N/A xserver- xorg-input- evdev: xserver- xorg-input- evdev N/A xserver- xorg-video- ati: xserver- xorg-video- ati N/A xserver- xorg-video- intel: xserver- xorg-video- intel N/A xserver- xorg-video- nouveau: xserver- xorg-video- nouveau N/A
Architecture: amd64
CompizPlugins: [core,composite
CompositorRunning: compiz
Date: Fri Aug 8 03:51:43 2014
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
DkmsStatus: fwts-efi-
ExtraDebuggingI
GraphicsCard:
Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller])
Subsystem: Dell Device [1028:05ba]
Advanced Micro Devices, Inc. [AMD/ATI] Mars [Radeon HD 8730M] [1002:6601] (rev ff) (prog-if ff)
InstallationMedia: Ubuntu 12.04.5 LTS "Precise Pangolin" - Release amd64 (20140807.1)
MachineType: Dell Inc. Inspiron 5721
MarkForUpload: True
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/25/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A12
dmi.board.name: 0KNF68
dmi.board.vendor: Dell Inc.
dmi.board.version: X01
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.
dmi.modalias: dmi:bvnDellInc.
dmi.product.name: Inspiron 5721
dmi.product.
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.7.12-0ubuntu4
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.52-1~precise1
version.
version.
version.
version.
version.
version.
version.
version.