That's the behavior if the extension is present but not active. If it is simply not present, it just returns NULL and generates the warning string:
Xlib: extension "XINERAMA" missing on display ":0.0".
At any rate, the fix will likely be the same. If Xinerama is either not there or not enabled, then there is only one screen whose geometry matters.
That's the behavior if the extension is present but not active. If it is simply not present, it just returns NULL and generates the warning string:
Xlib: extension "XINERAMA" missing on display ":0.0".
At any rate, the fix will likely be the same. If Xinerama is either not there or not enabled, then there is only one screen whose geometry matters.