I started to notice this recently with this advent of Google's fancy new images search. As one scrolls down the page and more images are pulled in the Xorg CPU usage pegs to a core. After you get to the bottom scrolling back and forth seems fine.
My hypothesis (well, more of a wild stab in the dark really since I know very little about X) is that firefox is asking for various bitmap stuff from the X-server and this is the cause of the badness. FTR I also have an NVidia card (GeForce 8800) and this driver (from the logs): [ 218.696] (II) NOUVEAU driver Date: Thu Aug 5 00:40:40 2010 +0200 [ 218.696] (II) NOUVEAU driver for NVIDIA chipset families : [ 218.696] RIVA TNT (NV04) [ 218.696] RIVA TNT2 (NV05) [ 218.696] GeForce 256 (NV10) [ 218.696] GeForce 2 (NV11, NV15) [ 218.696] GeForce 4MX (NV17, NV18) [ 218.696] GeForce 3 (NV20) [ 218.696] GeForce 4Ti (NV25, NV28) [ 218.696] GeForce FX (NV3x) [ 218.696] GeForce 6 (NV4x) [ 218.696] GeForce 7 (G7x) [ 218.696] GeForce 8 (G8x) [ 218.696] (II) NOUVEAU driver Date: Thu Aug 5 00:40:40 2010 +0200 [ 218.696] (II) NOUVEAU driver for NVIDIA chipset families : [ 218.696] RIVA TNT (NV04) [ 218.696] RIVA TNT2 (NV05) [ 218.696] GeForce 256 (NV10) [ 218.696] GeForce 2 (NV11, NV15) [ 218.696] GeForce 4MX (NV17, NV18) [ 218.696] GeForce 3 (NV20) [ 218.696] GeForce 4Ti (NV25, NV28) [ 218.696] GeForce FX (NV3x) [ 218.696] GeForce 6 (NV4x) [ 218.696] GeForce 7 (G7x) [ 218.696] GeForce 8 (G8x) -- You received this bug notification because you are a member of Ubuntu Bugs, which is a direct subscriber. https://bugs.launchpad.net/bugs/38131 Title: Firefox causes massive Xorg CPU usage -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
