<br><br><div class="gmail_quote">On Wed, Apr 30, 2008 at 7:53 AM, Dotan Cohen <<a href="mailto:dotancohen@gmail.com">dotancohen@gmail.com</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> 2008/4/30 Joel Bosveld <<a href="mailto:joel.bosveld@gmail.com">joel.bosveld@gmail.com</a>>:<br> <div><div></div><div class="Wj3C7c">><br> ><br> > On Wed, Apr 30, 2008 at 6:01 AM, Dotan Cohen <<a href="mailto:dotancohen@gmail.com">dotancohen@gmail.com</a>> wrote:<br> > > I have a Dell Inspiron with the ATI x1400 video card. In Ubuntu 7.04 I<br> > > ran Compiz-Fusion in XGL with the fglrx drivers and the system was<br> > > very responsive. I noticed no performance penalties at all. In Ubuntu<br> > > 8.04 I am running Compiz natively with the current fglrx drivers, and<br> > > the system is sluggish. Disabling Compiz makes the system very<br> > > responsive. So I am interested in running Compiz in XGL like I had in<br> > > 7.04. Is this advised? Are there and disadvantages? I specifically<br> > > need the Enhanced Zoom Desktop and Negativity plugins. Thanks in<br> > > advance.<br> > ><br> > > Dotan Cohen<br> > ><br> > ><br> > The latest fglrx supports aiglx, and the xgl performance is not as good<br> > (from what I've heard). So disabling xgl will probably work (although the<br> > performance may not be as good as xgl in 7.04), either that or you will need<br> > to rollback to an older driver and use xgl.<br> ><br> > Joel<br> ><br> <br> </div></div>Thanks, Joel. I think that I'm not understanding correctly. You are<br> suggesting that I disable xgl, however, so far as I understand it is<br> not enabled now at all. Er, what is aiglx? I just read the wikipedia<br> article, and it all went over my head. Aiglx replaces the fglrx<br> driver? Replaces XGL? Another layer in between? Sorry for the<br> ignorance, us ME majors are not so bright in things CS :)<br> <br> Thinking more practically, how can I enable XGL on Kubuntu 8.04 to<br> test if that is better? Thanks.<br> <div><div></div><div class="Wj3C7c"><br> Dotan Cohen<br> <br> </div></div></blockquote></div>Sorry I misunderstood, I thought you were currently running with xgl also. Aiglx (at least from the users perspective) is just another way of doing what xgl does (with some advantages/disadvantages). As far as I understand the fglrx driver uses aiglx in order to do what xgl was doing for it (namely provide the texture_from_pixmap gl extension).<br> <br>To enable xgl it should be as simple as "sudo apt-get install xserver-xgl" then restart X.<br><br>Joel<br>