I can confirm what pepperminty added in his initial post
On Linux Mint 13 Cinnamon desktop pressing <PtrScr>
will silently launch gnome-screenshot, take a screenshot of the complete desktop and save it to a file in the folder $HOME/pictures.
To be precise, on my localized Mint 13, the folder will be $HOME/Bilder, and the filename will be Bildschirmfoto-dd.mm.yyyy-hh24:mi:ss.png (screenshot-dd.mm.yyyy:hh24:mi:ss.png).
If this does not work on your Linux Mint 13 Cinnamon desktop, please, go to Menu
=> System Tools
=> System Settings
=> Section "Hardware
" => Keyboard
=> Tab "Shortcuts
" => Item "Screenshots
" and check whether the <PtrScr>
has not been assigned to any action.
Cannot post any screenshot of it right now, because I am on Xfce at this moment. It is similar, but not completely identical.
As the linked thread
seems to suggest that the problem occurs on virtual machines:
My Linux Mint 13 Cinnamon Desktop does not run in a VM, but on a physical machine.
The graphics card is not AMD, but Nvidea.
The kernel is the current v3.2.0-32.
Cinnamon is v1.4.