Mint probably has a lot more "stuff" installed that the RPi system, which means a lot more stuff that can go wrong.

Xubuntu showed the same problem.

I opted to re-install Mint though, because it felt faster to me.
What kernel version does the RPi use? Command: uname -r
And similarly, what version is your Mint using: same command!
For the RPi I couldn't say : it's hooked up to my TV set upstairs and I'd have to connect a keyboard onto it to do that. (it's an XBMC Pi now, for which I don't need a keyboard - works great by the way) Do you really need to know this? If so, I'll run upstairs.
Mint uses 3.13.0-24-generic
Cheers [/quote]