Ubuntu
powernowd package

powernowd doesn't start

Bug #19529 reported by Fırat Küçük
4
Affects Status Importance Assigned to Milestone
powernowd (Ubuntu)
Fix Released
Medium
Tollef Fog Heen

Bug Description

-- powernowd doesn't start

configuration:
P4 2.8 ASUS A2H
711572 K total memory

pismikrop@mikropyuvasi:~$ sudo ps aux | grep powernowd
1000 8020 0.0 0.1 3252 724 pts/0 S+ 12:06 0:00 grep powernowd

--------------------------------

try to start powernowd service:

pismikrop@mikropyuvasi:~$ sudo /etc/init.d/powernowd start
P4 Clockmod is intentionally disabled
pismikrop@mikropyuvasi:~$ sudo ps aux | grep powernowd
1000 8136 0.0 0.1 3124 716 pts/1 R+ 12:07 0:00 grep powernowd

try to restarting powernowd service: (partial solution)
pismikrop@mikropyuvasi:~$ sudo /etc/init.d/powernowd restart
 * Stopping powernowd: [ ok ]
 * Starting powernowd... [ ok ]
pismikrop@mikropyuvasi:~$ sudo ps aux | grep powernowd
root 8160 0.0 0.0 1536 484 ? SNs 12:08 0:00
/usr/sbin/powernowd -q
1000 8176 0.0 0.1 3252 724 pts/1 S+ 12:09 0:00 grep powernowd

Revision history for this message
Paul Sladen (sladen) wrote :

Hello Firat,

The message:

  P4 Clockmod is intentionally disabled

is given because Pentium 4 processors are limited in their scaling ability---the
throttling is there merely to prevent thermal meltdown and does not actually
save power. P4-clockmod is hack to (ab)use the throttling in the chip; the
disadvantage being that it introduces latencies during normal use with no actual
gain.

As such, it /should/ be disabled and powernowd not needed to be started. I'm
intrigued by message about 'restart' working to start 'powernowd', even if there
is nothing to do. Could you provide output from:

  /sbin/lmsod | grep -Ei '(p4|acpi|cpu)'

and we may be able to see if a module is getting loaded anyway.

Thanks, Paul

Revision history for this message
Tollef Fog Heen (tfheen) wrote :

powernowd (0.96-1ubuntu2) breezy; urgency=low

  * Behave consistently wrt start/restart. Ubuntu #13285.
  * Add support for K8 semprons. Ubuntu #11376, #10347

 -- Tollef Fog Heen <email address hidden> Mon, 19 Sep 2005 12:29:26 +0200

(I'll be handling the p4-clockmod problem once it's fixed in the kernel)

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