3D acceleration only works for one user at a time

[Peter Gaston]

"Ouattara Oumar Aziz (alias wattazoum)" <wattazoum at gmail.com> wrote:

> Peter Gaston a écrit :
> > My video card is an old AGP Powercolor Radeon 9250 (r200). Using
the
> > open source ATI Xorg drivers, I can get hardware 3D acceleration to
> > work for only one logged in user. Because of this, Compiz runs
slowly
> > for all other users.
> > 
> > I have traced the problem to the lack of direct rendering in the 
other
> > logged in users. Running "glxinfo | grep 'direct rendering'" shows
> > "direct rendering: Yes" for the the user with fast 3D desktop
effects
> > but "No" for all the other users.
> > 
> > Logging out all users and logging back only fixes the problem by
> > shuffling the user who gets the hardware 3D acceleration. At any
given
> > time, only one user has accelerated graphics.
> > 
> > What do I need to do to fix this problem?
> 
> Currently, in my humble opinion, there is nothing you can do to fix
> this but open a bug report to push for a fix.
> I think compiz, doesn't support more than one user at a time.

Thanks for the clarification. This is what I suspected. However, it
seems to me that this limitation had not been highlighted in all of the
discussions I read about the use of Compiz and similar 3D desktops.
This is surprising given the fact that Linux and other Unix-like OS are
supposed to be multi-user. I'll see if I can get more info (for a
possible solution) to open a bug report.

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