Raring Alpha 2 Live CD does not enable Compositing

[Martin Gräßlin]

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

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Re: Raring Alpha 2 Live CD does not enable Compositing

[Harald Sitter]

On Fri, Feb 15, 2013 at 5:49 PM, Martin Gräßlin mgraess...@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
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 kubuntu-devel mailing list
 kubuntu-devel@lists.ubuntu.com
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 https://lists.ubuntu.com/mailman/listinfo/kubuntu-devel


https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/285626

not sure why it uses native though

HS
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