Public bug reported: Before today's update, I could use an exernal monitor plugged into the mini display port (intel card) of my Inspiron xps 15z. Now after today's update the display preferences applet doesn't detect the external monitor and clicking on Detect Displays doesn't help. I tried rebooting on the previous (3.0.0-15) kernel version and the problem remained so I think its due to a compiz update.
Here is the list of updated packages from /var/log/apt/history.log: Start-Date: 2012-02-15 08:32:49 Commandline: aptdaemon role='role-commit-packages' sender=':1.299' Install: linux-image-3.0.0-16-generic:amd64 (3.0.0-16.28), linux-headers-3.0.0-16:amd64 (3.0.0-16.28), linux-headers-3.0.0-16-generic:amd64 (3.0.0-16.28) Upgrade: juju:amd64 (0.5+bzr453-1juju2~oneiric1, 0.5+bzr454-1juju2~oneiric1), compiz-plugins-default:amd64 (0.9.6+bzr20110929-0ubuntu6, 0.9.6+bzr20110929-0ubuntu6.1), tomcat6-user:amd64 (6.0.32-5ubuntu1.1, 6.0.32-5ubuntu1.2), linux-generic:amd64 (3.0.0.15.17, 3.0.0.16.19), firefox-globalmenu:amd64 (10.0+build1-0ubuntu0.11.10.1, 10.0.1+build1-0ubuntu0.11.10.1), firefox:amd64 (10.0+build1-0ubuntu0.11.10.1, 10.0.1+build1-0ubuntu0.11.10.1), libtomcat6-java:amd64 (6.0.32-5ubuntu1.1, 6.0.32-5ubuntu1.2), compiz-gnome:amd64 (0.9.6+bzr20110929-0ubuntu6, 0.9.6+bzr20110929-0ubuntu6.1), linux-headers-generic:amd64 (3.0.0.15.17, 3.0.0.16.19), linux-image-generic:amd64 (3.0.0.15.17, 3.0.0.16.19), firefox-locale-en:amd64 (10.0+build1-0ubuntu0.11.10.1, 10.0.1+build1-0ubuntu0.11.10.1), libservlet2.5-java:amd64 (6.0.32-5ubuntu1.1, 6.0.32-5ubuntu1.2), compiz-plugins:amd64 (0.9.6+bzr20110929-0ubuntu6, 0.9.6+bzr20110929-0ubuntu6.1), libdecoration0:amd64 (0.9.6+bzr20110929-0ubuntu6, 0.9.6+bzr20110929-0ubuntu6.1), tomcat6-common:amd64 (6.0.32-5ubuntu1.1, 6.0.32-5ubuntu1.2), compiz:amd64 (0.9.6+bzr20110929-0ubuntu6, 0.9.6+bzr20110929-0ubuntu6.1), linux-libc-dev:amd64 (3.0.0-15.26, 3.0.0-16.28), compiz-core:amd64 (0.9.6+bzr20110929-0ubuntu6, 0.9.6+bzr20110929-0ubuntu6.1), firefox-gnome-support:amd64 (10.0+build1-0ubuntu0.11.10.1, 10.0.1+build1-0ubuntu0.11.10.1) End-Date: 2012-02-15 08:34:42 I will try a unity 2d session to see if the problem persists. ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: xorg 1:7.6+7ubuntu7.1 ProcVersionSignature: Ubuntu 3.0.0-16.28-generic 3.0.17 Uname: Linux 3.0.0-16-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 1.23-0ubuntu4 Architecture: amd64 CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,move,commands,regex,animation,place,session,grid,obs,workarounds,mousepoll,wall,imgpng,unitymtgrabhandles,gnomecompat,resize,vpswitch,wobbly,fade,expo,scale,ezoom,unityshell] CompositorRunning: compiz Date: Wed Feb 15 11:13:33 2012 DistUpgraded: Log time: 2011-10-17 19:46:06.316435 DistroCodename: oneiric DistroVariant: ubuntu DkmsStatus: vboxhost, 4.1.8, 3.0.0-14-generic, x86_64: installed vboxhost, 4.1.8, 3.0.0-15-generic, x86_64: installed vboxhost, 4.1.8, 3.0.0-16-generic, x86_64: installed ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0126] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Dell Device [1028:0446] nVidia Corporation Device [10de:0df5] (rev a1) (prog-if 00 [VGA controller]) Subsystem: Dell Device [1028:0446] InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1) MachineType: Dell Inc. Dell System XPS 15Z ProcEnviron: PATH=(custom, user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-16-generic root=UUID=bef2e696-3944-4c80-af8f-e8414a26c6f7 ro pcie_aspm=force acpi=noirq i915.semaphores=1 quiet splash keyboard-configuration/layoutcode=fr keyboard-configuration/variantcode=oss vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: Upgraded to oneiric on 2011-10-17 (120 days ago) XorgConf: Section "Device" Identifier "Default Device" Option "NoLogo" "True" EndSection dmi.bios.date: 05/09/2011 dmi.bios.vendor: Dell Inc. dmi.bios.version: A02 dmi.board.name: 060G42 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnDellInc.:bvrA02:bd05/09/2011:svnDellInc.:pnDellSystemXPS15Z:pvr:rvnDellInc.:rn060G42:rvrA00:cvnDellInc.:ct8:cvr0.1: dmi.product.name: Dell System XPS 15Z dmi.sys.vendor: Dell Inc. version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu6.1 version.ia32-libs: ia32-libs 20090808ubuntu26 version.libdrm2: libdrm2 2.4.26-1ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3 version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7.1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2.1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1 ** Affects: compiz (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug compiz-0.9 oneiric regression-update running-unity ubuntu -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/932640 Title: Display preferences app no longer detects external monitor after today's update To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/932640/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs