When my computer is locked, regardless of it timing out after 10 minutes or by me pressing CTRL+L, it takes forever to activate it.
It also appears as if the time it takes is linear to the time it as been locked.
If I lock my computer in the evening, at 8 o'clock in the morning it will take between one or two minutes to get the login-prompt when touching any keys or moving the mouse.
The computer somewhat responds immediately though, the CPU-fan goes into hyper-drive, ergo it's doing something. If I've left the System Monitor running, it will show both CPU's becoming rather busy the second I touched a key.
dmesg doesn't reveal any errors or indications about what it has been spending time on.
I'm running Gnome Classic, with the following settings:
System Settings: Power
System Settings: Brightness and Lock
Worth mentioning is that this behavior was introduced with 12.04, I had no issues whatsoever with 11.10.
If anybody could help me fix this rather annoying issue my ulcer will go away.