The problem is the function "gdk_x11_screen_get_window_manager_name"
which "gnome-appearance-properties" uses to test if Compiz has started.
Here is a small test program that demonstrates the problem:
Build and run the program. It will output 'Metacity' all the time. Then
start 'compiz --replace' while the program is running and it will
continue to print 'Metacity'. Restart the program while compiz is
running and it will output 'compiz'.
#include <gdk/gdk.h>
#include <gdk/gdkx.h>
// gcc -g intel.c -o intel-test `pkg-config --cflags gtk+-2.0 gdk-2.0`
`pkg-config --libs gtk+-2.0 gdk-2.0`
int main(int argc, char *argv[])
{
gdk_init(&argc, &argv);
while(1)
{
GdkScreen *default_gdk_screen = gdk_screen_get_default();
if (!default_gdk_screen)
return 0;
printf("%s\n",
gdk_x11_screen_get_window_manager_name(default_gdk_screen));
}
}
--
[regression] Cannot enable Compiz from gnome-appearance-properties
https://bugs.launchpad.net/bugs/420308
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