When I connect or disconnect an external monitor, or when I switch the power of a connected monitor on and off, the state does not get detected.
When I switch the external monitor off, or remove the laptop from the docking-station, the system continues to "think" there are two monitors connected.
Sometimes it helps to push the button "detect monitors" in the display setiings, or to hit the hardware button that toggles trough the display states (internal-only, mirror screens, external-only, extended screen) , on my machine it's the Fn-F5 key.
But sometimes this does not help at all.
Even worse, when I put the laptop in the docking-station with the external-monitor powered off, and the cold-boot the laptop, X "thinks" that the external monitor were powered on.
As I have a laptop and two docking-stations, one at home the other at work, with two different external monitors connected I could see a really strange effect.
Even with the monitor powered off I can see the correct monitor information in the display settings dialog, so some how the information is read from the powerless monitor.
If connected and turned on, the displays otherwise work normally, no screen corruption of any kind.
Just the state of the monitors is not correctly detected.
On Quantal using precisely the same harware it worked as expected.
On external monitor on/off or dock/undock the display settings adjusted themselves to the new situation without any manual interaction.
I verfied this behaviour also with a live USB Stick of raring-beta2.
I'm not 100% sure whether this bug is to be located in the linux-kernel or the X11 system.
It just worked with all Ubuntu Versions from Karmic up to Quantal, and now using Raring it does no longer work.
When I connect or disconnect an external monitor, or when I switch the power of a connected monitor on and off, the state does not get detected.
When I switch the external monitor off, or remove the laptop from the docking-station, the system continues to "think" there are two monitors connected.
Sometimes it helps to push the button "detect monitors" in the display setiings, or to hit the hardware button that toggles trough the display states (internal-only, mirror screens, external-only, extended screen) , on my machine it's the Fn-F5 key.
But sometimes this does not help at all.
Even worse, when I put the laptop in the docking-station with the external-monitor powered off, and the cold-boot the laptop, X "thinks" that the external monitor were powered on.
As I have a laptop and two docking-stations, one at home the other at work, with two different external monitors connected I could see a really strange effect.
Even with the monitor powered off I can see the correct monitor information in the display settings dialog, so some how the information is read from the powerless monitor.
If connected and turned on, the displays otherwise work normally, no screen corruption of any kind.
Just the state of the monitors is not correctly detected.
On Quantal using precisely the same harware it worked as expected.
On external monitor on/off or dock/undock the display settings adjusted themselves to the new situation without any manual interaction.
I verfied this behaviour also with a live USB Stick of raring-beta2.
I'm not 100% sure whether this bug is to be located in the linux-kernel or the X11 system.
It just worked with all Ubuntu Versions from Karmic up to Quantal, and now using Raring it does no longer work.
Ciao,
Franco
ProblemType: Bug ature: Ubuntu 3.8.0-19.29-generic 3.8.8 support. test.0:
DistroRelease: Ubuntu 13.04
Package: xorg 1:7.7+1ubuntu4
ProcVersionSign
Uname: Linux 3.8.0-19-generic x86_64
.tmp.unity.
ApportVersion: 2.9.2-0ubuntu8 ,opengl, compiztoolbox, decor,regex, grid,vpswitch, imgjpeg, commands, mousepoll, move,imgpng, resize, place,animation ,imgsvg, gnomecompat, snap,session, wall,workaround s,expo, fade,scale, unityshell] irectDriverBlac klist: '(nouveau| Intel). *Mesa 8.0' irectFSW: true nterest: Yes /vmlinuz- 3.8.0-19- generic root=UUID= d80ce3a6- 4fc4-41f7- b7ee-5faf50197e 82 ro kopt=quiet splash version: N/A bvrv1.3601: bd03/03/ 2008:svnAcer, inc.:pnTravelMa te6292: pvrNotApplicabl e:rvnAcer, Inc.:rnVictoria :rvrNotApplicab le:cvnAcer, Inc.:ct1: cvrN/A: version: Not Applicable daily13. 04.18.1~ 13.04-0ubuntu1 libgl1- mesa-dri: libgl1-mesa-dri 9.1.1-0ubuntu3 libgl1- mesa-dri- experimental: libgl1- mesa-dri- experimental N/A libgl1- mesa-glx: libgl1-mesa-glx 9.1.1-0ubuntu3 xserver- xorg-core: xserver-xorg-core 2:1.13.3-0ubuntu6 xserver- xorg-input- evdev: xserver- xorg-input- evdev 1:2.7.3-0ubuntu2b2 xserver- xorg-video- ati: xserver- xorg-video- ati 1:7.1.0-0ubuntu2 xserver- xorg-video- intel: xserver- xorg-video- intel 2:2.21.6-0ubuntu4 xserver- xorg-video- nouveau: xserver- xorg-video- nouveau 1:1.0.7-0ubuntu1
Architecture: amd64
CompizPlugins: [core,composite
CompositorRunning: compiz
CompositorUnred
CompositorUnred
Date: Sat Apr 27 07:08:01 2013
DistUpgraded: 2013-04-23 06:09:45,803 DEBUG enabling apt cron job
DistroCodename: raring
DistroVariant: ubuntu
DkmsStatus: vboxhost, 4.2.12, 3.8.0-19-generic, x86_64: installed
ExtraDebuggingI
GraphicsCard:
Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) [8086:2a02] (rev 03) (prog-if 00 [VGA controller])
Subsystem: Acer Incorporated [ALI] Device [1025:011b]
Subsystem: Acer Incorporated [ALI] Device [1025:011b]
InstallationDate: Installed on 2009-11-19 (1254 days ago)
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
MachineType: Acer, inc. TravelMate 6292
MarkForUpload: True
PccardctlIdent:
Socket 0:
no product info available
PccardctlStatus:
Socket 0:
no card
ProcKernelCmdLine: BOOT_IMAGE=
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to raring on 2013-04-23 (4 days ago)
dmi.bios.date: 03/03/2008
dmi.bios.vendor: Acer
dmi.bios.version: v1.3601
dmi.board.name: Victoria
dmi.board.vendor: Acer, Inc.
dmi.board.version: Not Applicable
dmi.chassis.type: 1
dmi.chassis.vendor: Acer, Inc.
dmi.chassis.
dmi.modalias: dmi:bvnAcer:
dmi.product.name: TravelMate 6292
dmi.product.
dmi.sys.vendor: Acer, inc.
version.compiz: compiz 1:0.9.9~
version.ia32-libs: ia32-libs 20090808ubuntu36
version.libdrm2: libdrm2 2.4.43-0ubuntu1
version.
version.
version.
version.
version.
version.
version.
version.
xserver.bootTime: Fri Apr 26 23:03:39 2013
xserver.configfile: default
xserver.errors:
xserver.logfile: /var/log/Xorg.0.log video_driver: intel
xserver.version: 2:1.13.3-0ubuntu6
xserver.