OK, thanks to this thread: https://bbs.archlinux.org/viewtopic.php?pid=887492#p887492 I found that creating the attached file in my home directory fixes this bug.
to test this try: vblank_mode=0 glxgears on a alternative Window-Manager like lxde. If it shows rotating gears, then this "fix" will probably work. ** Attachment added: ".drirc" https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1352239/+attachment/4179765/+files/.drirc -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to unity in Ubuntu. https://bugs.launchpad.net/bugs/1352239 Title: Windows aren't rendered/updated when using Unity Status in Unity: New Status in “unity” package in Ubuntu: Confirmed Bug description: This is possible related to Bug #1352231 When using Unity windows aren't rendered or updated. In LXDE everything works fine. Steps to reproduce: 1. Log into Unity 2. Open a Window What should happen: The window is shown & I can interact with it. What actually happens: Only the Mouse-Cursor changes. I can only see anything happened after running "unity --replace". For every Update(Window movement, ...) I have to repeat "unity --replace" in order to see the changes. When did this regression happen: Last known working configuration was 28 July 2014. The problem started with the update to linux kernel "3.13.0-20-generic", where temporarily fixed by booting "3.13.0-19-generic" but it seems like every kernel is "affected" since now this "workaround" doesn't help either. ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: unity 7.3.0+14.10.20140711-0ubuntu1 ProcVersionSignature: Ubuntu 3.13.0-20.42-generic 3.13.7 Uname: Linux 3.13.0-20-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.14.5-0ubuntu3 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' Date: Mon Aug 4 10:56:48 2014 EcryptfsInUse: Yes SourcePackage: unity SystemImageInfo: Error: [Errno 2] Datei oder Verzeichnis nicht gefunden: 'system-image-cli' UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/1352239/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
