[CentOS] Desktop Effects -- questions/issues

fred smith fredex at fcshome.stoneham.ma.us
Mon Jun 16 22:33:00 UTC 2008

On Mon, Jun 16, 2008 at 06:43:49PM +0200, Dag Wieers wrote:
> On Sun, 15 Jun 2008, fred smith wrote:
> >I finally tried enabling the desktop effects yesterday. I'm using an old
> >Nvidia card (GeForce 4 MX440) with, of course, Nvidia's drivers. this is
> >on a fully updated Centos 5 system.
> >
> >Enabling from the gnome menu doesn't exactly work compltely, one needs to
> >google around a bit to find out the remaining magic incantations to make
> >it fully work. So, I've done that and it's working.
> >
> >Issues:
> >1. I notice that the text in the bar at the top of each window appears to 
> >be
> >a different font, and it is outlined in black. Is there any way to tweak
> >that setting?
> >2. If I have a window that is slid partially off the edge of an individual
> >desktop it now oveerlaps the edge of the one "next" to it, when it never
> >did before. Not sure if I like that or not, is there any way to change
> >that behavior should I decide I don't like it?
> >3. I have (and always have had) the panel settings set to "autohide". I
> >now notice that it sometimes does not hide itself until I explicitly
> >click in an empty part of the panel, then somewhere else on the desktop.
> >Anyone know if there's a way to resovle this?
> >
> >Question:
> >Should I decide I want to revert to the way it was before I enabled these
> >effects, how would I go about that? there is no "disable" button on the
> >gnome menu, only the "enable" button. I know how to un-do the changes I
> >made manually in the xorg.conf file, but no idea how to undo whatever it
> >is that the "enable desktop effects" button does. Clues would be 
> >appreciated.

Dag, thanks for the reply!

> Not sure if this is helpful to you, but here is my experience:
> I have an older/cheaper onboard nvidia in my mediacenter. It was hooked up 
> to a 1920x1200 TFT screen. compiz was terribly slow and play video's did 
> not work with some error message.
> I tried both the nvidia drivers as well as the Open Source nv driver and 
> was disappointed, blamed the old/cheap nvidia and the high resolution as 
> the cause for not being able to use compiz.
> Initially I also had problems with display-errors that were attributed to 
> a very simple fix described here:
>     http://wiki.centos.org/TipsAndTricks/Compiz
> I finally found that by increasing the video memory size in the BIOS from 
> 32MB to 128MB (system was upgraded from 512MB to 1536MB) compiz worked 
> very fast and the video-overlay/XV problems were gone.
> My advice would be:
>  - Use the nvidia driver (we have dkms-enabled packages in RPMforge)
I'm using a driver I got directly from Nvidia. Are you saying that some
of the re-packaged nvidia drivers are better (in other ways than that
they make use of the distro's packaging, I mean)?

>  - Look at the tips in the wiki for compiz
I think I already did but I'll go check again in case I missed something.
I assume you mean the Centos wiki...

>  - Increase the Video memory size in the BIOS to at least 128MB
Sorry, no can do. It's a dedicated card with 64MB. I'm thinking of
picking up something less obsolete, though. I probably ought to do it
soon, as it looks like AGP cards are now being relegated to the low-end
and it's probably getting worse as time moves on.  My display is "only"
1280x1024, so that 64 megs may not be too terrible a limitation.

performance isn't a big issue (except for resizing windows which sometimes
is fairly painful--I read somewhere else (possibly on compiz' own site)
that this is due to something other than compiz but right now I don't
remember the details.) I can rotate the cube quickly and easily, and
the jello windows jiggle nicely, assuming one likes jiggly windows.
> And let me add that last point to the wiki, so people can find it there.
> -- 
> --   dag wieers,  dag at centos.org,  http://dag.wieers.com/   --
> [Any errors in spelling, tact or fact are transmission errors]

---- Fred Smith -- fredex at fcshome.stoneham.ma.us -----------------------------
   "For the word of God is living and active. Sharper than any double-edged 
   sword, it penetrates even to dividing soul and spirit, joints and marrow; 
              it judges the thoughts and attitudes of the heart."  
---------------------------- Hebrews 4:12 (niv) ------------------------------
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