Public bug reported:
This problem only happens when I'm working with two monitors.
If I press the keyboard button "Brightness down", the screen resolution of one
of my monitors changes. If I press it again, the laptop's screen turns off.
I can restore my original configuration by going to 'System settings' ->
'Displays'
This problem doesn't happen when pressing "Brightness up" button.
If I change the resolution by going to 'System setting' -> 'Brightness &
lock', I don't get any problems.
It seems to happen only when:
* Pressing the keyboard button &
* Decreasing brightness &
* Having multiple monitors
I have attached a video showing the problem.
ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: xorg 1:7.7+1ubuntu6
ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
Uname: Linux 3.11.0-12-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory:
'/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
NVRM version: NVIDIA UNIX x86_64 Kernel Module 319.32 Wed Jun 19 15:51:20
PDT 2013
GCC version: gcc version 4.8.1 (Ubuntu/Linaro 4.8.1-10ubuntu8)
.tmp.unity.support.test.0:
ApportVersion: 2.12.5-0ubuntu2.1
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
Date: Thu Oct 31 10:34:39 2013
DistUpgraded: Fresh install
DistroCodename: saucy
DistroVariant: ubuntu
DkmsStatus: nvidia-319, 319.32, 3.11.0-12-generic, x86_64: installed
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes
GraphicsCard:
NVIDIA Corporation GT216M [GeForce GT 320M] [10de:0a2d] (rev a2) (prog-if 00
[VGA controller])
Subsystem: Acer Incorporated [ALI] Device [1025:036d]
InstallationDate: Installed on 2013-10-27 (3 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
MachineType: Packard Bell EasyNote TM85
MarkForUpload: True
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.11.0-12-generic
root=UUID=392386e0-8d2e-400d-b4bf-4ce5ae57d3a0 ro quiet splash
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/25/2011
dmi.bios.vendor: Packard Bell
dmi.bios.version: V1.23
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: EasyNote TM85
dmi.board.vendor: Packard Bell
dmi.board.version: V1.23
dmi.chassis.type: 10
dmi.chassis.vendor: Packard Bell
dmi.chassis.version: V1.23
dmi.modalias:
dmi:bvnPackardBell:bvrV1.23:bd04/25/2011:svnPackardBell:pnEasyNoteTM85:pvrV1.23:rvnPackardBell:rnEasyNoteTM85:rvrV1.23:cvnPackardBell:ct10:cvrV1.23:
dmi.product.name: EasyNote TM85
dmi.product.version: V1.23
dmi.sys.vendor: Packard Bell
version.compiz: compiz 1:0.9.10+13.10.20131011-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.46-1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.2.1-1ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.2.1-1ubuntu3
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.14.3-3ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu3.1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu10
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.904-0ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.9-2ubuntu1
xserver.bootTime: Thu Oct 31 10:17:18 2013
xserver.configfile: default
xserver.errors:
Failed to load /usr/lib/xorg/modules/libglamoregl.so:
/usr/lib/xorg/modules/libglamoregl.so: undefined symbol: _glapi_tls_Context
Failed to load module "glamoregl" (loader failed, 7)
open /dev/fb0: No such file or directory
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
xserver.version: 2:1.14.3-3ubuntu2
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug compiz-0.9 resolution saucy ubuntu
** Attachment added: "Video demonstrating the problem"
https://bugs.launchpad.net/bugs/1246659/+attachment/3896481/+files/Brightness%20problem.mp4
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https://bugs.launchpad.net/bugs/1246659
Title:
Problem with brightness control on multi-monitor system
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