I have Ubuntu working pretty well on my laptop. It's the 15.6 inch version with an i7 and a GeForce 940M(X).
It was actually quite easy to get running. I installed it in the standard way. However, booting can be a bit of an issue.
What causes the boot failure on these laptops is ACPI. You need to either disable it or set it to noirq mode. If you disable it, you lose power controls.
If you disable ACPI, you can get back most of its functionality by enabling APM, the older ancestor for ACPI.
Anyhow, how do you do this? When you are at the GRUB boot screen, press e, taking you to the advanced settings.
In the line with the linux boot flags, throw in acpi=off apm=1 or acpi=noirq.
That should allow you to boot.
In order to make the changes permanent, edit: /etc/default/grub as root. Set GRUB_CMDLINE_LINUX_DEFAULT to the option(s) you used that worked. Save that file.
Now, run sudo update-grub in order to regenerate the GRUB configuration files.
You should be able to successfully (re)boot.
EDIT: Editing the grub configuration file in /boot/... is a very bad idea because it's automatically generated and will be overwritten next time update-grub works (updating the kernel, etc.). Instead, you update the local Grub configuration file and use update-grub to regenerate the proper configuration file for you.
Best Answer
You may have a problem with an older computer, with an older GPU. Try this...
type:
change:
to:
Then reboot.