Ubuntu
laptop-mode-tools package

  1. Bug #250935
  2. Comment #9

Comment 9 for bug 250935

Revision history for this message
ceg (ceg) wrote :

Hi Tormod,
you asked:

3. Are some fixes needed in the pm-utils package as well?
Can you reference other bug reports (with patches)?

I do remeber two things, first Bug #239419 (pm-utils)
  "pm-utils has laptop-tools script which conflicts with laptop-mode-tools"
has been wrongly set as a duplicate of this bug, but is actually messing with laptop-mode-tools job.

IMHO the cleanest (and non misleading) fix would be to just remove the /usr/lib/pm-utils/power.d/laptop-tools script from pm-tools. (laptop-mode-tools does all that in a configurable way)

And as Alexey has pointed out in a comment, as this script has (and currently is) setting /proc/sys/vm/laptop_mode unconditionaly. So it is tested is may be time now to enable laptop-mode by default with package laptop-mode-tools. (It will still only activate laptop-mode on battery by default.)

But then finally Bug #59695 (High frequency of load/unload cycles on some hard disks may shorten lifetime) can be fixed. Simply by enabling CONTROL_HD_POWERMGMT=1 in laptop-mode.conf.
The NOLM_AC_HD_POWERMGMT=254 setting that is present will then disable head parking by default.