When you add the boot parameter acpi=off you must be very careful.
The text must be in the same line where the 'linux' entry is. And you must have exactly ONE space between the last
character and the text acpi=off
Also, there must not be anything else after the acpi=off text - not even a space character.
Example:
The text must be in the same line where the 'linux' entry is. And you must have exactly ONE space between the last
character and the text acpi=off
Also, there must not be anything else after the acpi=off text - not even a space character.
Example:
Code:
linux /boot/vmlinuz.... bla bla bla quiet splash acpi=off