I found that I have TV connected to S-Video output of my Nvidia videocard. In that two monitor configuration there is no gnome-panel on both screens.
** Summary changed: - Gnome-panel not shown in Ubuntu 12.04 + Gnome-panel not shown in Ubuntu 12.04 if TV is connected ** Tags added: apport-collected ** Description changed: After latest software update there is no gnome-panel on screen. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: gnome-panel 1:3.4.1-0ubuntu1.1 ProcVersionSignature: Ubuntu 3.2.0-48.74-generic 3.2.46 Uname: Linux 3.2.0-48-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.0.1-0ubuntu17.3 Architecture: amd64 Date: Mon Jul 1 19:48:12 2013 InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027) MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: gnome-panel UpgradeStatus: Upgraded to precise on 2012-10-01 (272 days ago) + --- + ApportVersion: 2.0.1-0ubuntu17.3 + Architecture: amd64 + DistroRelease: Ubuntu 12.04 + InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027) + MarkForUpload: True + NonfreeKernelModules: nvidia + Package: gnome-panel 1:3.4.1-0ubuntu1.1 + PackageArchitecture: amd64 + ProcEnviron: + TERM=xterm + PATH=(custom, no user) + LANG=en_US.UTF-8 + SHELL=/bin/bash + ProcVersionSignature: Ubuntu 3.2.0-48.74-generic 3.2.46 + Tags: precise third-party-packages + Uname: Linux 3.2.0-48-generic x86_64 + UpgradeStatus: Upgraded to precise on 2012-10-01 (272 days ago) + UserGroups: -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-panel in Ubuntu. https://bugs.launchpad.net/bugs/1196593 Title: Gnome-panel not shown in Ubuntu 12.04 if TV is connected Status in “gnome-panel” package in Ubuntu: New Bug description: After latest software update there is no gnome-panel on screen. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: gnome-panel 1:3.4.1-0ubuntu1.1 ProcVersionSignature: Ubuntu 3.2.0-48.74-generic 3.2.46 Uname: Linux 3.2.0-48-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.0.1-0ubuntu17.3 Architecture: amd64 Date: Mon Jul 1 19:48:12 2013 InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027) MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: gnome-panel UpgradeStatus: Upgraded to precise on 2012-10-01 (272 days ago) --- ApportVersion: 2.0.1-0ubuntu17.3 Architecture: amd64 DistroRelease: Ubuntu 12.04 InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027) MarkForUpload: True NonfreeKernelModules: nvidia Package: gnome-panel 1:3.4.1-0ubuntu1.1 PackageArchitecture: amd64 ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcVersionSignature: Ubuntu 3.2.0-48.74-generic 3.2.46 Tags: precise third-party-packages Uname: Linux 3.2.0-48-generic x86_64 UpgradeStatus: Upgraded to precise on 2012-10-01 (272 days ago) UserGroups: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-panel/+bug/1196593/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp