[ltp] How to improve battery life on Thinkpad X60s

[Martin Lorenz]

On Thu, Sep 14, 2006 at 11:20:12PM +0000, John Fremlin wrote:
> I have a Thinkpad X60s. When running MS Windows XP with maximum
> powersaving it switches down to use less than 7W.
> 
> Under Linux (2.6.17), I have brought it down to use about 10W, but
> normally it runs at about 11W. 
> 
> Why does Linux use so much more power? It also runs hotter (53C
> instead of 42C for both thermal zones), in particular the area on the
> right of the fingerprint reader is noticeably warmer.
> 
> The CPUs are at 1GHz, CPU0 alternates between C2 and C3 and CPU1 is
> between C3 and C6. Running with nosmp doesn't seem to help.

C6???
I have never heard of C6 before.
I have C1, C2 and C3 here and acpitool reports
  C-states (incl. C0)    : 4
  Usage of state C1      : 10 (0.0 %)
  Usage of state C2      : 602456 (83.6 %)
  Usage of state C3      : 117947 (16.4 %)
for CPU0
and
  C-states (incl. C0)    : 4
  Usage of state C1      : 10 (0.0 %)
  Usage of state C2      : 1323264 (64.7 %)
  Usage of state C3      : 33 (0.0 %)
for CPU1

  Thermal zone 1 : ok, 45 C
  Trip points :
  -------------
  critical (S5):           127 C

  Thermal zone 2 : ok, 49 C
  Trip points :
  -------------
  critical (S5):           97 C
  passive:                 93 C: tc1=5 tc2=4 tsp=600 devices=0xc210a310
0xc210a2fc


I would also like to reduce energy consumption...
I was the one who started the last thread on this subject.

I have a X60s (model 1702-55G)
and a 2.6.18-rc7 kernel with two patches running

cheers
  mlo
--
Dipl.-Ing. Martin Lorenz

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