Unable to Boot after installation , ACPI errors
To Help ALL,
First an explanation of why ACPI errors occur in Linux, and why it can USUALLY be ignored
Second, if hundreds of errors happen on boot like my Hp OmenX Bleeding Edge Laptop, I will show you a trick for Grub (the boot loader) to ignore them, and boot normally
Third, I am posting this as I just upgraded my kernel, and all my "Errors: Quote: ACPI:3400 Unsupported Event" have disappeared, and I will show you how to upgrade your kernel.
ACPI Errors - Microsoft's Fault!!
It's supposed to be a standard that any operating system can properly implement. However, in typical Microsoft fashion, MS operating systems do not follow or properly implement the ACPI standard. Instead, MS gives motherboard manufacturers their own improperly implemented ACPI code for inclusion in the motherboard BIOS/UEFI. The code runs fine with MS windows but all for other operating systems like linux there can be problems.
Because of MS's market dominance, the faulty ACPI implementation from MS has become the de facto industry standard. As a result, Linux and other non-MS operating systems have to reverse engineer the faulty ACPI implementation from MS. That's why you can see problems in Linux with ACPI related functionality like suspend to RAM, hibernate, etc.
Apparently, the ACPI related code in certain newer Linux kernels has a problem with the typical BIOS/UEFI ACPI implementation on certain motherboards which is why we're getting those error messages. Even though I get those error messages at the beginning of the boot process, I've had no problems with suspend/resume or any other ACPI related issues.
I have seen advice to not run in BIOS legacy mode by disabling UEFI but to run in UEFI mode instead with secure boot disabled. I haven't bothered with it myself since I have several operating systems already installed with BIOS legacy mode and I would have to reinstall everything if I wanted to switch to UEFI mode. (UEFI Mode is working GREAT for my install)
Hp / ACPI Errors
ACPI - Advanced Configuration & Power Interface
To avoid seeing ERROR "acpi int3400 unsupported event" ERRORS...
In the file /etc/default/grub
Add to the line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" the parameters
acpi=off or noacpi acpi=strict
So that after your edit it looks, for example, like this
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=strict"
For me, acpi=strict is working best. You can also try acpi=force, and pnpacpi=off worked For another HP Spector user.
To edit the file you need to open it with root permission, for example by running
sudo -H gedit /etc/default/grub
After editing, update the configuration by running
sudo update-grub
and regenerate the initrd:
sudo update-initramfs -u
and then restart to see the effect
The latest kernel 4.19.5 has ELIMINATED ALL my problematic acpi:3400 errors
Install UKUU:
UKUU - Ubuntu Kernel Update Utility: Manage and Install Newest Bleeding Edge Kernels
sudo add-apt-repository ppa:teejee2008/ppa
sudo apt update && sudo apt install ukuu
and after run UKUU and it will offer to install or uninstall any and of course the newest (stable or not so stable) KERNEL.
IT ALWAYS LEAVES your last working kernel as a backup should the new one not work as well as you would like.
If anyone is still struggling with this, the issue was with my graphics card driver(Nouveau). I disabled it using modprobe and the whole thing started working.
On the grub screen, press e and in the line with 'Linux' add the following at the end:
modprobe.blacklist=nouveau