Check your xorg.conf and see if it has a line saying composition=false or something like that. Mine had that put in by default I think. <div class="gmail_quote">On Nov 4, 2011 2:10 AM, "mierdatutis mi" <<a href="mailto:mmm286@gmail.com">mmm286@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Hi, I've installed the ati drivers 11.10 x64. I'm trying to enable Desktop Effects but it says me that all the efects cant activate. Could you help me please? Thanks and sorry for my english! -- kubuntu-users mailing list <a href="mailto:kubuntu-users@lists.ubuntu.com">kubuntu-users@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/kubuntu-users" target="_blank">https://lists.ubuntu.com/mailman/listinfo/kubuntu-users</a> </blockquote></div>