Adam Pribyl wrote:
First I'd like to say, there is still lot of confusion about AIGXL and
composition managers in Fedora. From time the FC5 was released there is
not clear statement, wherether the AIGLX is really in Xorg that is
distributed with FC as it seems from Release notes
http://fedora.redhat.com/docs/release-notes/fc5/release-notes-ISO/#id3148356
The stock FC5 X server does not have AIGLX, it's based on the 7.0 server.
or it has to be installed separately as described here:
http://fedoraproject.org/wiki/RenderingProject/AiglxOnFedora
Yes, that's why we created the repo.
According to my experience AIGLX is not included in basic FC instalation
and you have to extend the repository to aiglx and update your
instalation. Without this you only get flickering screen and loose your
window decoration when triing to enable the metacity composition with
gconftool-2. If you try to install AIGLX and use compiz from aiglx
repository at the moment, you get unresolved dependencies for libwnck >=
2.15.4, in FC5 there is now latest 2.14.3.
libwnck is upgraded now, so you should be able to runs compiz. Some of the
packages in the repo have been superceeded by FC5 updates in the meantime, so
it may be a bit tricky to update at the moment.
In the case you want to revert AIGLX updates there is no describtion how
to do that.
Yeah, there is no good way to downgrade as far as I know. You have to
manually download the stock FC5 versions of the RPMs that the aiglx repo has
installed and then install them using the --oldpackage option to rpm.
In FC5 gdm configuration, man can choose to use "aiglx" server (Xair).
There si no such thing like Xair anymore from official sources.
Switching this results in unusable X and hand edits to gdm configuration.
Xair and the gdm choice was one of the first packagings of AIGLX and is no
longer available or recommended.
There is nowhere clearly stated what graphics card the AIGLX is
confirmed working or was tested on. On the page
http://fedoraproject.org/wiki/RenderingProject/aiglx
it says all Radeon 7000-9250 is known to work, however, from my personal
experience, on Radeon 9200 it is not working as it should (got blue
screen with shadows switching with screen with menus and apps - unusable).
It does not state wherether I have to use for ATI Radeon cards "radeon"
driver or "ati" driver or this does not mather.
I am also curious, wherether AIGLX could work without DRI or not, and I
am not alone. There are several people, that report glxinfo says No to
render, however AIGLX says enabled (I did not saw it personaly.).
AIGLX can not work without DRI.
Even there is no big interest in Fedora Project AIGLX working with
proprietary fglrx and nvidia drivers, it would be nice to make sure the
statement that is on aiglx page
http://fedoraproject.org/wiki/RenderingProject/aiglx?highlight=%28aiglx%29#head-df1959e565dbcf41eba56dc070062e7af60e8a63
is still true or not.
Also, browsing the internet discussion and e.g. ubuntu/gentoo pages, I
found lot of issues that may arise with AIGXL - e.g. slow firefox
scrolling etc. Definitely, the Xorg with AIGLX causes some people to not
be able to set some resolution. There are none of those mentioned on
fedoraproject AIGLX pages.
AIGLX itself does not cause slow down in itself. If you're using a
compositing manager such as compiz or the discontinued metacity compositor,
you may experience slow downs for full-window updates such as scrolling or
animation. This is a current bottleneck in the open source graphics stack.
AIGLX does not cause any slow down for legacy (that is, non-composited)
desktop environments.
AIGLX has no effect whatsoever on the resolutions you can configure with your
card.
As those pages are main source people get when asking goolge etc. about
aiglx, it would be nice if anybody WHO KNOWS (I am not the one) what the
status really is, updates those pages.
Yes, that is a valid point.
Similar applies for FC6t.. there is too big mist around this feature
that is so interesting for desktop users. And I think it's pity.
For FC6, AIGLX is installed and enabled by default, and so is Composite. As
you can see in rawhide, we will be shipping a compiz package, and we aim to
make the compiz / metacity switch as simple as clicking a button.
Thanks for testing,
Kristian
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