I have a very similar problem, after upgrading from Snow Leopard to Lion on a
Mac mini with an Intel Core 2 Duo running at 2.53 GHz with 4 GB.
I also lose my cursor. Just had to reboot because I lost my cursor and couldn't get it back. Everything is way slower than with either Leopard or Snow Leopard. I'm not in the once-familar land of Winddoze, which I thought I had left behind years ago when I switched from Windows to a Mac. Almost everything is now slow, and now I have to restart frequently, to only temporily get rid of slow-ups.
Found the discussion and suggestions from John KItchen helpful--gave me some ways to think about what might be happening. Would prefer to not have to zero out my harddrive and reinstall. Would also prefer not to have to add more memory, as I'm now hearing some systems are running fine with 4 GB. (But maybe with different processors?)
Upgrading has certainly impeded my ability to get my ordinary work done on this machine! Ugh!
Following John Kitchen's suggestions, however, I found no option appearing in the app information screen to run any of the apps in 32-bit mode. Many are running in 64-bit mode. And I'm getting Page-ins in the thousands!
One other bit of info gleaned from this discussion so far--I did not know the Mac OS does backgound adjustments over night. I have always put my machine into sleep mode when I'm not using it. Will now try leaving it 24/7 for a while, and see if that might improve things. My system has progressively slowed down since upgrading.
Also don't know if any of the apps I'm running a lot are also causing a problem--the latest versions, for example, of Firefox, Evernote, Pathfinder 6, Click To, and sometimes Devonthink Pro, Has anyone else had problems caused by any of those apps?
I appreciate the discussion, with the observations made and the tips and information shared.
Thanks.
Mike