Raring Alpha 2 Live CD does not enable Compositing

Harald Sitter sitter.harald at gmail.com
Fri Feb 15 17:49:33 UTC 2013

On Fri, Feb 15, 2013 at 5:49 PM, Martin Gräßlin <mgraesslin at kde.org> wrote:

> Hi all,
> I just gave a try to the Alpha 2 live CD and had to notice that
> compositing is
> not enabled by default. I think this is a very bad choice as you don't
> allow
> users to experience the full chances of Kubuntu. This results in the in
> general bad screenshots in media as people try in virtual machines (e.g.
> [1]).
> I would appreciate if this default could be changed.
> The system I tested on is perfectly capable of running OpenGL based desktop
> effects (after all it's one of my development systems) and pressing
> Alt+Shift+F12 enabled Desktop Effects successfully in the live system.
> I can only assume that Compositing is disabled by default because it used
> to
> be problematic especially with NVIDIA on live systems. This is no longer
> the
> case. For one thing the drivers work properly and KWin has a wonderful
> driver
> feature detection and can enable features based on driver and GPU. Also
> there
> is nothing to fear even if the driver is broken. KWin disables Compositing
> automatically.
> I have not heard of a real problem like an unusable desktop due to
> Compositing
> in years.
> An additional note: I checked which Qt graphicssystem is used on the live
> CD
> for KWin and it's native. That is not Qt's default and a pretty bad default
> for KWin, we prefer to have the raster system.
> If you have any questions please let me know and I am happy to answer them.
> Please keep me in CC as I'm not subscribed to the mailing list.
> --
> Martin Gräßlin
> [1] http://en.wikipedia.org/wiki/File:Kubuntu_12.jpg
> --
> kubuntu-devel mailing list
> kubuntu-devel at lists.ubuntu.com
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not sure why it uses native though

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