Is use of OpenLayers-2.11 ,GeoExt-1.1 and ext-4.0.7-gpl supported . I have only included ext-all.js in the script src. Should I include others too?
I am pretty sure that GeoExt does not work together with ExtJS 4 yet. You should use ExtJS 3.4.0 like GeoExt does in this MapPanel example.
You also need to add the ext-base.js which you can see in the above mentioned example.
GeoExt does currently only work with ExtJS 3, but GeoExt is planing a code sprint that targets:
developing GeoExt 2.0 to work with ExtJS 4