I have t41 too. But it's working fine with compositing. It has radeon 7100 mobile graphics card. I don't like compiz, so I disable it not from command line doing hard thing, but from menu system -> display and so on. Kind regards Dulmandakh Sukhbaatar <a href="http://www.dulmandakh.com">http://www.dulmandakh.com</a> <a href="http://www.twitter.com/dulmandakh">http://www.twitter.com/dulmandakh</a> <blockquote type="cite">On Nov 3, 2009 5:31 AM, "LD 'Gus' Landis" <<a href="mailto:ldlandis@gmail.com">ldlandis@gmail.com</a>> wrote: Hi, Hard hang on ThinkPad T41 on Karmic Koala. Probably other "older" systems. The current default "Change Desktop Background"->"Visual Effects" in Karmic is "Normal". On my ThinkPad T41, the Karmic version overwhelms the machine and causes a hard hang. I was able to resolve this on three separate machines, and accidentally discovered it when I had one machine that worked (two failed). I was able to get past this by immediately (after login) change the "Visual Effects" to "None". So far, enabling compiz on T41 with Karmic causes hard hang. Enabling metacity causes unusably slow response (of Firefox for sure). It seems that disabling all of compiz and metacity is necessary for "older" machines. Cheers, --ldl -- --- NOTE: If it is important CALL ME - I may miss email, which I do NOT normally check on weekends nor on a regular basis during any other day. --- LD Landis - N0YRQ - de la tierra del encanto 3960 Schooner Loop, Las Cruces, NM 88012 575-448-1763 N32 21'48.28" W106 46'5.80" -- Ubuntu-devel-discuss mailing list <a href="mailto:Ubuntu-devel-discuss@lists.ubuntu.com">Ubuntu-devel-discuss@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-devel-discuss" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-devel-discuss</a> </blockquote>