Try this:

$ glxinfo | grep vendor

you should get something like this:

wido@frankie:~$ glxinfo  | grep vendor
server glx vendor string: NVIDIA Corporation
client glx vendor string: NVIDIA Corporation
OpenGL vendor string: NVIDIA Corporation


If you are getting something different than NVIDIA (like, 'mesa') then you
should reinstall nvidia drivers.

If you updated your mesa packages (asuming rpm or deb distro) then it might
have screwed your nvidia installation. Else.......I have no idea :D



El 28 de noviembre de 2011 06:40, robert <rob...@split.gr> escribió:

> On Mon, 2011-11-28 at 09:38 +0100, Cedric BAIL wrote:
> > On Mon, Nov 28, 2011 at 9:30 AM, robert <rob...@split.gr> wrote:
> > > On Wed, 2011-11-23 at 16:31 +0200, robert wrote:
> > >> Good afternoon,
> > >> I am experiencing terrible performance with compositing.
> > >> opengl is working fine on other applications / glxgears / whatever.
> > >>
> > >> However when enabling compositing with opengl I'm not getting more
> than
> > >> 5 fps or so.
> > >>
> > >> If anyone has any clues as to what I might be doing wrong, I'd
> > >> appreciate it.
> > >>
> > >>
> > >> Hardware is nvidia 9400M, using latest drivers, 32bit linux (opensuse)
> > >>
> > >>   OpenGL X11.................: yes (Xlib: yes) (XCB: no) (GLES: no)
> > >> (SGX: no) (s3c6410: no)
> > >>
> > >> I read in an older post to this list that I should avoid gles / xcb /
> > >> anything else than autodetected so for now my tests have only been
> using
> > >> xlib opengl.
> > >>
> > >> Thanks in advance,
> > >>
> > >> Robert
> > >
> > > Good morning,
> > >
> > > After changing from custom driver install to community rpms, the opengl
> > > engine of enlightenment did not work at all. (I got a message that my
> > > screen does not support openGL).(Note: opengl was working fine)
> > >
> > > Next attempt was to install latest beta drivers from nvidia. This time
> > > it worked and I managed to get decent(ish) performance on a single
> > > screen. It's certainly not "fast" and it's unusable on two screens
> > > however.
> > >
> > > Sorry for being a pain, but is there any configuration I might have
> > > missed ? / does anyone have any good experiences with the compositing?
> > > I mean it looks good, but other than enabling it for showing off, I
> have
> > > not found it practically usable.
> > > Are there any plans to improve it in the near future ?
> >
> > Seems like you have an issue with your hardware or your driver here.
> > According to wikipedia it does support shader enought for E17, so not
> > a hardware limitation. Could you check that in the Composite Setting,
> > you are using Open GL with texture from pixmap ?
>
> Hi Cedric, thanks for your reply.
>
> I have tried both with and without said option.
> When using texture from pixmap, the performance is 2-3x worse than when
> not.
>
> There is also an "engine" screen that has a "Use ARGB instead of shaped
> windows"
>
> I have tried both on and off.
>
>
>
>
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-- 
Wido
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