Are you sure you installed 1.9.100 in /usr/lib/xorg/modules/drivers/mga_drv.so (the driver installs to another directory by default)? And I think I also manually applied any relevant patches from the 1.4.9 Ubuntu package before building the driver, but I don't remember if that included anything important.
I should also note that Metacity is only useable under 1.9.100 if I enable compositing (/apps/metacity/general/compositing_manager gconf key).
There are still some annoyances in my setup with 1.9.100, e.g. none of the video outputs seem to work ok. But xrandr with dual screen and compositing work.
Are you sure you installed 1.9.100 in /usr/lib/ xorg/modules/ drivers/ mga_drv. so (the driver installs to another directory by default)? And I think I also manually applied any relevant patches from the 1.4.9 Ubuntu package before building the driver, but I don't remember if that included anything important.
I should also note that Metacity is only useable under 1.9.100 if I enable compositing (/apps/ metacity/ general/ compositing_ manager gconf key).
See also this xorg bug that prevents 1.9.100 to be used with Jaunty's xorg: http:// bugs.freedeskto p.org/show_ bug.cgi? id=20380
There are still some annoyances in my setup with 1.9.100, e.g. none of the video outputs seem to work ok. But xrandr with dual screen and compositing work.