strange behavior in power management

Asked by Gang Chen on 2011-10-04

I installed Ubuntu 11.04 on Fujitsu Lifebook 3020 (Pentium-M 1.1G, 1G RAM, 250G HDD) and everything is working well except the power management when using battery power:

The hard drive keep spinning down after a short period. Then after less than a minute, it will spin up again for a few seconds, do some I/O activities, then spin down again. This cycle keeps going even after I disabled "spin down the hard drive when possible" in preferences through the battery icon.

If I run Ubuntu from the USB, the hard drive will spin down and stay down after about 15 min--which is really preferred for mobile use.

Why is the hard drive keep spinning down even if I told it not to? How can I adjust the time interval the hard drive should spin up/down? Is there a way to tell Ubuntu to keep as much in the RAM as possible unless it needs to save changes to the hard drive--behave as if running through USB except for the persistence?

Question information

English Edit question
Ubuntu gnome-power-manager Edit question
No assignee Edit question
Last query:
Last reply:
Revision history for this message
actionparsnip (andrew-woodhead666) said :

If you look in power options it may have an option to not spin down the drive.

You may also be able to run:
gksudo gedit /etc/default/acpi-support

add the line:

Save the new file and reboot to test.


Can you help with this problem?

Provide an answer of your own, or ask Gang Chen for more information if necessary.

To post a message you must log in.