I cant make ACPI=OFF permanent in grub

[ash772]

Hi folks, i'm a beginner on Ubuntu and i'm experiencing some dificulties.

I have installed Ubuntu 12.043. LTS on an Asus Laptop with a live cd.

board: X71SL (Pegatron corporation ATI)
bios: 09/24/2008 American Megatrends Inc version 204
proc: 2x Intel Core 2 Duo T5800 @ 2.00GHz 1999.00MHz
gc: geforce 9300M GS (Que je ne vois pas dans le report systinfo)

I've made some research on different forums and it turns out that i can only make Ubuntu works by adding the command ACPI=OFF into the grug during the boot. In this case Ubuntu works nicely.
Turning on the pc without modifying the ACPI results in a black or purple screen.

Now i want to edit definitively the /etc/default/grub file, but none of the commands i've found works. (Editing and updating grub is ok and when i restart, the grub display the changes)

Heres the command i have tryied so far:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor"

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi"

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=off" (this one works only when i do it manualy)

I may need a bit of help here.

If you need any imformation, just ask.

Thanks in advance.

[Quackers]

After you included acpi=off after the qiet splash entry did you then run

sudo update-grub

in the terminal?
That should make the change permanent.

[Boab1993]

Try editing the line in the etc/default/grub

note: This is not the line 'GRUB_CMDLINE_LINUX_DEFAULT'

GRUB_CMDLINE_LINUX=""

to

GRUB_CMDLINE_LINUX= "acpi=off"

Then do as above in a terminal

sudo update-grub

hope this helps

[ash772]

Yes, i have done the updating grub command. I'm making another try now.

Thx for answering anyway.

[ash772]

I will try again with a fresh install. I am messing with the etc/default/grub file for two days now and may have accidentaly change something wrong.

[Quackers]

That's possible - it gets difficult to remember what was original and what you've changed.
Good luck!

[Boab1993]

It can be changed via command line on boot. No need for a fresh install.

Either hold down shift on boot to edit the grub before start up or when in a position of black screen after startup try pressing ctrl+alt+f1 and login via your details.

Then just type : gksudo gedit /etc/default/grub

And you can edit the grub

[ash772]

good to know, thx.

[wildmanne39]

Did you try nomodeset first because acpi=off turns of several things, it is different from computer to computer but in many cases the fans and wireless will not work.

[Boab1993]

Did you try nomodeset first because acpi=off turns of several things, it is different from computer to computer but in many cases the fans and wireless will not work.

This is actually a good time to ask because you seem to know what your doing.

Disabling acpi in this way, does that just disable it for the period of booting or is it permanent?

One person says one thing, the other says another, just wondering if you had a clear answer.