The game is not playable because mouse events appear became completely bogus. Mouse works correctly in menus, but not in game when selecting units or if having selected units, right clicking to give orders to units. Problem was reported upstream at https://sourceforge.net/tracker/?func=detail&aid=3598159&group_id=300350&atid=1266776
This may not be exactly a glew problem, but I found these after some google'ing: This describes the exact same problem I see: http://forums.fedoraforum.org/showthread.php?t=286192 interesting the comment that it works with proprietary driver but not free driver. But reports the problem for fedora 17, but I do not have this problem in my fedora 17 test computer (with intel video driver). After some extra searching I also found this pastebin with an interesting title "MegaGlest Unit Moving Error": http://pastebin.com/ixLmnAGG My current guess after a few rebuilds and reading the code is that the fault is at: source/glest_game/graphics/renderer.cpp:6602 ... //get the world coordinates gluUnProject( screenX, screenY, depth, modelviewMatrix, projectionMatrix, viewport, &worldX, &worldY, &worldZ); ... I suspect it is returning bogus "world" coordinates there. If insisting in playing, sometimes it will work, usually when clicking in a region just a few pixels in the "fog of war", and always work if clicking in another unit, that is, smart casting it to move/follow another unit. Also, telling works to build a construction appears to always work.
I found a workaround. Add: EnableColorPicking=true to $HOME/.megaglest/glestuser.ini search for EnableColorPicking in BUILD/megaglest-3.7.1/source/glest_game/graphics/renderer.cpp to see the alternate/default code paths.
I just updated to latest rawhide, after update to new X Server and rebuild of all drivers, etc. The workaround is still necessary. One possible helpful extra bit of information is that, if not using the workaround it is "possible" to play if one selects the units, does maximal zoom, and them right click for the "smart action" (attack/move/gather). Example: 1. select worker 2. zoom to have camera looking in the ground 3. move to some resource, usually gold 4. right click on the resource 5. profit
Upstream tells that "selectbuf" is not longer supported by OpenGL and was already known to be buggy in a few drivers, just that now it does not work with drivers that defer some fallbacks to mesa. Megaglest will be updated to use the "colorpick" mode, so, for now the only solution for drivers that do not work is to add EnableColorPicking=true to $HOME/.megaglest/glestuser.ini until the next megaglest release, that will have the above by default.