I want to install Ubuntu 16.04LTS on HP Pavilion 15-bc513tx but it keeps on displaying ACPI error.

[AtanuGuha]

I want to install Ubuntu 16.04LTS on HP Pavilion 15-bc513tx but it keeps on displaying ACPI error. I have downloaded and installed the latest BIOS from HP website, butstill the problem persists. ACPI alreadys exist.. and many other error messages are coming. Finally stopping the installation process

[WAWood · Accepted solution]

@AtanuGuha 

I'm sorry, but HP only warranties their PCs for usage with the OS that comes preinstalled.

IF you replace that with a Linux distro, or add a Linux distro, then you assume full responsibility for maintaining that -- including solving any problems with booting the other OS and/or installing the other OS.

Your best bet for support with issues with Linux is to contact the support forum of the distro you are using.

Since you are using Ubuntu, go here: https://ubuntuforums.org/

Good Luck

[AtanuGuha]

I solved the problem myself after 4 hours of struggle.

Just edit the grub boot file pressing "e" and add the following boot options just after the word "quite splash" ...

pci=nommconf modprobe.blacklist=nouveau

"modprobe.blacklist=nouveau" basically ignore the ACPI errors but don't solve it, solving ACPI errors need to add the option ACPI=off  or  lib.noacpi=1. But this option may lead to inactiveness of input devices mouse/touchpad/keyboard. So just ignore it.

Now press F10 and start booting into Ubuntu...

Once the installation starts and you see some dots are blinking (as if the system is searching for something), just unplug your bootable USB and re-plug it on the same port (in case it is DVD-ROM, just open the tray and close). You are done!!!

The trick can save your few hours and obviously save you from going to a "breaking head" situation.

GOOD LUCK.