I've installed linux mint KDE lisa 12, since a while in my ASUS N55Sf. which has a NVIDIA® GeForce® GT 555M graphic card, and is known by its compatibility issues with Linux.
My graphic card wasn't detected by default, I installed Bumblebee it worked and i was so happy with it. After a while (maybe a week) it became unstable, sometimes my system boots properly and sometimes my screen crashes, which forces me to reboot using nomodeset - remove and reinstall bumblebee - reboot and everything returns to order. However after a shutdown and a reboot later my screen re-crash, and this happened so many times that i started worrying about my hardware.
I don't know but maybe it's due to some updates that i installed using the update manager.
I'm new to Linux, i tried many distributions: openSUSE (didn't work) , Ubunto 12.04-beta (worked but was so buggy and i just didn't like Unity), Fedora (didn't work), and then Linux Mint which i fell in love with, but this bumblebee problem is becoming so frustrating!
If you need any additional infos please let me know - Any help would be very appreciated.