I have the same model and I am posting answer cuz I couldn't find one.Installation:
First download Linux-Secure-Remix
64 bit from this page: https://help.ubuntu.com/community/LinuxSecureRemix
create a live usb, make some free space for ubuntu in disk manager, restart -> go to bios options -> disable secure boot & enable legacy support, change boot order and keep usb on top.
Boot from live usb -> select install -> choose something else option -> create swap area -> bios grub area (at least 1 mb) -> ext4 partition
-> format ext4 partition & install ubuntu in it.
Now reboot, you won't see ubuntu in GRUB menu, don't worry.
Go to bios -> Disable legacy support -> reboot again with live usb -> run Boot-Repair utility -> do as it says. Reboot & done!Heating Issue:
When I tried to install ubuntu my machine switched off in 3 trials because of over-heating. Then I placed my machine on top of a switch rack in my lab, which exhaust air from top of rack, this air kept my machine cool until the installation.
you can try to use a laptop cooler or put your laptop in fridge(I read this one somewhere, it worked they said!)
after installation sudo gedit /etc/rc.loca
and add echo OFF > /sys/kernel/debug/vgaswitcheroo/switch
before exit 0
Reboot and your discrete graphics card will be switched off at each reboot.
To further reduce heat, use laptop-mode-tools, install using:sudo apt-get install laptop-mode-tools
now, if you want to monitor the heat sensors, use instructions from this page:http://www.webupd8.org/2012/07/monitor-hardware-temperature-in-ubuntu.html
Hope this helps!-Rahul