Ubuntu
acpi-support package

  1. Bug #59695
  2. Comment #402

Comment 402 for bug 59695

Revision history for this message
Pacho Ramos (pacho) wrote :

Seems that laptop-mode-tools should fix this as read in Changelog:
-Set HD power management values to 254 instead of 255. Some hard drives go into "no power management" mode only on 254, while 255 yields some kind of default that you don't want.

http://www.samwel.tk/laptop_mode/changelog