Various problems with Compiz on multi-head setup
Binary package hint: compiz
I'm using an Nvidia GeForce 6600 GT in a mult-head (non-Xinerama) configuration on Gutsy. With Compiz enabled there are a bunch of problems, mostly with the second head, that I think may be manifestations of the same unknown cause. The lack of obvious errors in my logs and the symptoms displayed lead me to believe there is a problem with the second desktop instance reading the Gnome or Compiz config files.
First, no window decorations are being loaded by gtk-window-
Second, the Quit button on the second desktop freezes the display instead of showing the logout/power window. This was reported in bug #150846 but I found that the window is active but invisible. ESC returns control to the desktop and Alt-L logs out.
Third, the long menu delay on every menu and pull-down really annoys me but with my setup it's only present on the primary head, not the secondary. Setting gtk-menu-
Fourth, changing the number of workspaces with the Workspace switcher on the second head only changes the primary head, not the secondary. It also doesn't seem to get along with the Compiz settings but that appears to be a known limitation.
Fifth, the only errors I see in the logs are from Nautilus complaining about "Can not calculate _NET_NUMBER_