I can confirm this using a Nvidia 6600 GT with Nvidia 185.18.14 drivers.
*) Starting compiz via fusion-icon in the startup applications causes 100% CPU load. Killing either compiz.real or metacity reduces CPU load back to normal.
*) Starting compiz manually after session start with 'compiz --replace' causes 100% CPU load. Killing either compiz.real or metacity reduces CPU load back to normal.
*) After restarting metacity with 'metacity --replace' I can start compiz with 'compiz --replace' without high CPU load.
In my case the high CPU load is caused by gconfd-2, which continuously writes to ~/.gconfd/saved_state
I can confirm this using a Nvidia 6600 GT with Nvidia 185.18.14 drivers.
*) Starting compiz via fusion-icon in the startup applications causes 100% CPU load. Killing either compiz.real or metacity reduces CPU load back to normal.
*) Starting compiz manually after session start with 'compiz --replace' causes 100% CPU load. Killing either compiz.real or metacity reduces CPU load back to normal.
*) After restarting metacity with 'metacity --replace' I can start compiz with 'compiz --replace' without high CPU load.
In my case the high CPU load is caused by gconfd-2, which continuously writes to ~/.gconfd/ saved_state
Maybe a duplicate or connected: https:/ /bugs.launchpad .net/ubuntu/ +source/ gconf2/ +bug/390733