OK, I just tested with a Live-USB disk of Linux Mint 17.2 Cinnamon (kernel 3.16) newly burned from the ISO file and suspend/resume works great. Multiple times in a row, from the shutdown icon, from the power button, and from the notebook lid close/open. So this is either Kernel or distro dependant and perhaps not related to the BIOS version as I thought. I tested this from a Live-USB of Linux Mint 18 Cinnamon (kernel 4.4) and it DOES NOT work, it has the same problem - first suspend/resume works fine, then upon second suspend it displays the yellow text warning and reboots the system at the BIOS level.
OK, I just tested with a Live-USB disk of Linux Mint 17.2 Cinnamon (kernel 3.16) newly burned from the ISO file and suspend/resume works great. Multiple times in a row, from the shutdown icon, from the power button, and from the notebook lid close/open. So this is either Kernel or distro dependant and perhaps not related to the BIOS version as I thought. I tested this from a Live-USB of Linux Mint 18 Cinnamon (kernel 4.4) and it DOES NOT work, it has the same problem - first suspend/resume works fine, then upon second suspend it displays the yellow text warning and reboots the system at the BIOS level.