I can confirm this behaviour on both of my systems: a Dell Dimension 1100 (Celeron 2.8Ghz, 1GB ram, Intel 82865G integrated graphics) and Dell Inspiron 8000 (P3 800Mhz, 196MB ram, ATI Mobility M4). There's a general feeling of sluggishness and excessive repainting occurs particularly when dragging windows - however, changing theme details from Human to Clearlooks results in a massive improvement.
Is this related to slow cairo rendering? Changing themes doesn't prevent sluggishness when dragging a window over a desktop full of icons, there's slight jerkiness as the icons are repainted. I think a composite manager (xcompmgr/compiz) can only prevent that completely? -- gtk+ apps slowness https://launchpad.net/bugs/38873 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs