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Thread: acpi=off where to set?
acpi=off where to set?
Re: acpi=off where to set?
Re: acpi=off where to set?
How do I disable ACPI when booting?
2 Answers 2
Booting Ubuntu with «acpi=off» grub parameter
4 Answers 4
Как отключить ACPI при загрузке?
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Thread: acpi=off where to set?

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acpi=off where to set?

I have tested just now if my small compaq 110 will work with ubuntu 10.04.1, it works from the life CD, but it needs the acpi=off to be set.

Whe I install it from that CD, where do I have to set the acpi=off before I reboot? (the ubuntu will not boot otherwise)

Re: acpi=off where to set?

Method 1 — Edit the grub menu item at boot time.

During the bootup hold down the SHIFT key. At the grub menu select Ubuntu and press e for edit.

Append the linux line with the boot option (acpi=off) and press Ctrl+x to boot.

Once booted in Ubuntu, edit the /etc/default/grub file:

and replace the line GRUB_CMDLINE_LINUX=»» with GRUB_CMDLINE_LINUX=»acpi=off»,

then generate a new Grub2 config file:

Method 2 — CHROOT

Before rebooting from the Live CD session, mount the root partition:

replace /dev/sdXY with the actual device name of the root partition (i.e. /dev/sda1). If you don’t know the device name, check it in System -> Administration -> GParted.

Mount the virtual filesystems:

and add the acpi=off option to the appropriate line. Save the file and exit (Ctrl+x, y, Enter).

Generate a new Grub2 config file:

Last edited by sisco311; October 9th, 2010 at 05:05 PM . Reason: =)

Re: acpi=off where to set?

If you need that parameter to initially boot an installed system, press e at the grub menu, then insert that on the same line as quiet splash. If Ubuntu is the only OS on your system and you have not seen the grub menu, press and hold Shift key after your BIOS splash screen to see the grub menu.

Note that if a kernel boot parameter is «always» required to run your PC properly, in /etc/default/grub instead of putting it in GRUB_CMDLINE_LINUX_DEFAULT=»quiet splash» (which applies to normal boot to a gui), instead put it within the quotes of GRUB_CMDLINE_LINUX=»» [which applies to «any» boot, including (recovery) boot to console].

Last edited by efflandt; October 9th, 2010 at 05:11 PM .

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How do I disable ACPI when booting?

When I tried to install Ubuntu from the live CD start menu, the screen became black with just a blinking cursor. I rebooted the PC and I chose the option acpi=off . Then the installer started and Ubuntu installed whitout problems.

But when I reboot the PC now after the installation was complete the screen goes black again. I am new in the use of Ubuntu.

2 Answers 2

Please add acpi=off to the kernel command line — it’s just slightly different than doing it with the LiveCD:

Press the Shift when booting up, to get the Grub menu. Use the arrow keys to navigate/highlight the entry you want (usually the first one).

Press e to edit that entry, which will show you the details:

Find the linux entry as shown above, use the arrow keys to get to it, and then press the End key to get to that line’s end (which may be on the next line!). Enter acpi=off as shown, and press Ctrl + X to boot.

You can make this workaround permanent by:

sudo nano /etc/default/grub
Change line GRUB_CMDLINE_LINUX_DEFAULT=»quiet splash» to GRUB_CMDLINE_LINUX_DEFAULT=»quiet splash acpi=off»
Ctrl — X , press Y and then Enter to save and exit.
sudo update-grub
Reboot and you should no longer have the black screen problem.

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Booting Ubuntu with «acpi=off» grub parameter

In order for me to boot into 12.04, I have to add the parameter acpi=off in grub. Any other options as specified here do not allow me to boot into Ubuntu.

My question is simple, what does setting the parameter acpi=off actually do?

And more importantly does repeatedly booting with acpi=off damage or harm the computer in anyway?

4 Answers 4

Using acpi = off disables your Advanced Configuration and Power Interface off temporarily while booting Ubuntu. If you have to add the acpi = off to let ubuntu boot successfully, it means that the ACPI on your computer isn’t compatible with this version of ubuntu.

I don’t think using acpi = off repeatedly wrecks your computer, because it only disables ACPI temporarily.

However, if you don’t want to add the acpi = off parameters every time you boot, you can disable the new card (BIOS) or disable ACPI (also from the BIOS). Use the second option if you can’t find the New Card Interface.

But, if you have Windows, disabling ACPI from the BIOS may wreck Windows and the computer will force you to reinstall it. So do that if you have a hidden windows recovery partition in your computer.

I’ve recently purchased a HP Envy 17 j053ea machine to take advantage of the i7 and oodles of memory. Cutting to the chase I suffered from many issues with this install. The wireless didn’t work, the screen «black screened» during installation and thereafter during booting. The get around for the black screen was the boot option acpi=off , but this of course meant that the laptop would not suspend when I closed the lid which is clearly suboptimal. After searching for the past two days I have found many good articles/explanations of acpi and a much better option:

Then I found: No ACPI support for my PC, what can I do? from irrational_john . way to go .. acpi=ht didn’t work but pci=noacpi has done the trick. For your hardware I’d recommend John’s approach pf cycling through the options he provided:

With this in hand abd to address “wub’s” .. on point answer above, once you find the one that works:

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Как отключить ACPI при загрузке?

Когда я попытался установить Ubuntu из стартового меню live CD, экран стал черным с мигающим курсором. Я перезагрузил компьютер и выбрал опцию acpi=off . Затем запустился установщик, и Ubuntu установил проблемы с выходом.

Но когда я перезагружаю ПК сейчас, после завершения установки экран снова становится черным. Я новичок в использовании Ubuntu.