compiz team mailing list archive

[Peter <902937@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

In general I was trying longer time to work out what is happening that
after moving to unity, window dragging has very very poor performance
when compiz is the window manager.

Issue is present all time when using NATIVE nvidia driver (novau works
fine).

Description: After very short time dragging of windows is very chunky
and practically dragging is not visible and cursor partially freezes if
motion of mouse is fast.

This was never an issue in previous versions of ubuntu.

After analysing  I have found exact way of reproducing (I was wondering why it starts slowing down after short time...).
Here you go:

1) In fact, dragging becomes chunky not after short time but after EVERY first drag of window, to reproduce:
To reproduce:
 - make sure you are using nvidia card
 - if not yet installed, install native nvidia drivers (manually or using apt-get)
 - open any windowed program (let's say xterm)
 - drag the window of the application: performance is great and very smooth
 - release the window
 - try to drag the same window again, performance is about 0fps
 - open another windowed application (another xterm) and drag, performance is high, try dragging again - performance is low

This issue does not occur with mutter or metacity or any other than
compiz window manager.

I rarely submit bugs, but this is critical (I switched to xfce4+mutter
because of this issue, unity is useless without compiz).

My graphics card: NVIDIA GTX570 (high specs)
My screen has 120Hz but difference will be noticable even with 22Hz monitor.
My ubuntu is up to date (and any software in it, but this bug is known for me across last 7 months, and all previous versions had it too).

In my opinion its a critical bug. Few of my folks also moved from unity
because of it (if they moved I gues there is much more people doing it).


Description:	Ubuntu 11.10
Release:	11.10
compiz:
  Installed: 1:0.9.6+bzr20110929-0ubuntu6
  Candidate:   1:0.9.6+bzr20110929-0ubuntu6
  Tabela wersji:
 *** 1:0.9.6+bzr20110929-0ubuntu6 0
        500 http://archive.ubuntu.com/ubuntu/ oneiric-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1:0.9.6+bzr20110929-0ubuntu3 0
        500 http://archive.ubuntu.com/ubuntu/ oneiric/main amd64 Packages

There is also another thing I have noticed. II am using multiple screens + projector and often switching between screens,
on Unity, when using nvidia-settings to switch between screens (TwinView) - the screen hangs.

Hope this was helpfull, Ubuntu is my fav system but this issue forced me
to considering other distros or old stable ubuntu without unity.

If there was no issue like this - Unity would rox.

Cheers.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: bash 4.2-0ubuntu4
ProcVersionSignature: Ubuntu 3.0.0-14.23-generic 3.0.9
Uname: Linux 3.0.0-14-generic x86_64
NonfreeKernelModules: tbs6925ctrl nvidia tbs6928fe tbs6922fe
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
Date: Sun Dec 11 21:16:23 2011
ExecutablePath: /bin/bash
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: bash
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: compiz (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug oneiric

-- 
You received this bug notification because you are a member of compiz
packagers, which is subscribed to compiz in Ubuntu.
https://bugs.launchpad.net/bugs/902937

Title:
  CRITICAL: Same bug of compiz performance over 11.10 and 11.04 ubuntu
  releases. Window dragging chunky and very slow with native nvidia
  drivers. Makes unity very hard to use.

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