Ubuntu
acpi package

Disabling Power Management

Asked by Murukesh Mohanan

If I uninstall ACPI-support, disabling power management is the first step. How do I disable this power management permanently? Is it connected to acpid? I tried disabling acpid and acpi-support from starting up automatically using Boot-Up Manager, but it still starts every time. This is related to a previous query from me: https://answers.launchpad.net/ubuntu/+question/107182

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George Standish
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George Standish (george-standish-deactivatedaccount) said : 		#1

To disable ACPI you should add acpi=off as a kernel boot option.

Hold down shift to get the GRUB menu (if you don't see it by default), then use the e key to edit the boot line for your specific kernel and add "acpi=off" as an option.

Best of luck,
George

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George Standish (george-standish-deactivatedaccount) said : 		#2

To make the changer permanent you need to edit the file /etc/default/grub see https://help.ubuntu.com/community/Grub2 for details (it does specifically mention the acpi=off option under GRUB_CMDLINE_LINUX_DEFAULT)

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Murukesh Mohanan (murukesh) said : 		#3

Thanks for the answer, but no luck. When I set the option acpi=off, Ubuntu fails to start. What I get is a lot of error messages, starting with one about a page fault, then a number of messages about acip or aicp or something (not acpi) and then messages about PCI resources, devices and so on. I tried thrice, once editing /etc/default/grub, twice editing the GRUB menu entry, each time with the same result. Sorry for continuing to annoy you.

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Best George Standish (george-standish-deactivatedaccount) said : 		#4

In addition to "acpi=off" you might want to try adding "noapic" as well.

Good luck,
George

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Murukesh Mohanan (murukesh) said : 		#5

Thanks George Standish, that solved my question.

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Murukesh Mohanan (murukesh) said : 		#6

No luck with that either. I give up. It seems disabling the power management causes problems with my USB hard drive, so there's nothing to be done, I suppose. Thanks a lot!

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Murukesh Mohanan (murukesh) said : 		#7

No luck with that either. I give up. It seems disabling the power management causes problems with my USB hard drive, so there's nothing to be done, I suppose. Thanks a lot!

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Murukesh Mohanan (murukesh) said : 		#8

Thanks George Standish, that solved my question.