When I'm logged into my account on my laptop (A Thinkpad t420 running Linux Mint 12 with Gnome 3), the mouse has a noticeably lower frame rate than when I'm at the log in screen, or even in another user account. I've been trying to get to the bottom of the problem for days.
The mouse is perfectly responsive, but it skips over most of the pixels in it's path if it's moving quickly. It's perfectly smooth in the other accounts.
It does not seem to be caused by the theme or any gnome-shell extensions. I have changed to other themes and changed a test account's themes and extensions to match my normal account. No difference.
htop does not show that any process is using too much CPU in either account. In both it was 1-4%.
I've played with the mouse settings in System Settings> Mouse and Touchpad but it hasn't changed the problem.
I'm pretty stumped. I suppose my next test is to remove the user account and re-create it, but I feel like I'd just mess up the mouse again and still have no idea what happened. Anyone have any ideas on how to fix it?