Windows aren't rendered/updated when using Unity

[Simon K]

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)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Simon K (octav14n)]

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.

[Philipp Kiemle (philipp-kiemle)]

Thank you for taking the time to report this bug. We have tried to recreate this on the latest release of Ubuntu and cannot reproduce it. This bug is being marked as Invalid. If you believe the problem to still exist in the latest version of Ubuntu please comment on why that is the case and change the bug status to NEW.