Ubuntu
powernowd package

Frequency Scaling reverts to "conservative", even with powernowd installed

Bug #87001 reported by Stefano Rivera
4
Affects Status Importance Assigned to Milestone
gnome-power-manager (Ubuntu)
Invalid
Undecided
Unassigned
powernowd (Ubuntu)
Invalid
Undecided
Unassigned

Bug Description

Binary package hint: linux-source-2.6.20

My Acer Ferrari 4005WLMi Laptop keeps booting up with the "conservative" governor enabled. I can change it to ondemand, but a suspend, hibernate, or reboot seems to revert it to conservative.

$ dpkg -l powernowd
ii powernowd 0.97-1ubuntu7 control cpu speed and voltage using 2.6 kernel interfa
$ uname -a
Linux liszt 2.6.20-8-generic #2 SMP Tue Feb 13 01:14:41 UTC 2007 x86_64 GNU/Linux

Tags: acer ferrari
Revision history for this message
Stefano Rivera (stefanor) wrote :
Revision history for this message
Stefano Rivera (stefanor) wrote :
Revision history for this message
Stefano Rivera (stefanor) wrote :

Note: I've also reported this in bug #80813 on package powernowd (which may well be the same problem...)

Tim Gardner (timg-tpi)
Changed in linux-source-2.6.20:
assignee: nobody → timg-tpi
Revision history for this message
Stefano Rivera (stefanor) wrote :

Hmm. More to this, it changes automatically to "powersave" when I'm on battery, so I'm thinking maybe it's a g-p-m bug.

Revision history for this message
Ben Collins (ben-collins) wrote :

The kernel doesn't keep state on this setting. That's up to userspace.

Changed in linux-source-2.6.20:
status: Unconfirmed → Rejected
Revision history for this message
Paul Sladen (sladen) wrote :

This is somehow related to bug #78512.

Revision history for this message
Stefano Rivera (stefanor) wrote :

Bug 78512 is SMP, I'm talking uniprocessor.

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

The built-in default of the kernel is 'conservative'. When a computer is switched off, it has no memory of previous settings. When the system boots, the built-in default is always used ('conservative').

If we want something else to be used, we need to have a program to tell the kernel to use something other than the default, /at every boot/.

After we have told the kernel we would like it to use a different governor, then we're okay to complain about the kernel changing the governor on its own.

The initscript that currently does this type of setting is called '/etc/init.d/powernowd'; not that this is primarily a script, by default we no longer start the associated daemon. That script currently lacks a useful configuration method since we stopped using the daemon and switched to the built-in kernel methods.

Changed in gnome-power-manager:
status: Unconfirmed → Rejected
Revision history for this message
Paul Sladen (sladen) wrote :

The 'powernowd' initscript lacks a useful configuration method. Also related to bug #78512 (restoring those configuration choices following a resume from hibernation or suspend with multiple CPUs).

Changed in linux-source-2.6.20:
assignee: timg-tpi → nobody
status: Rejected → Confirmed
Revision history for this message
Stefano Rivera (stefanor) wrote :

This fixed it for me:

http://foodfight.org/log/Hardware/laptop-running-hot.html

Changed in powernowd:
status: Confirmed → Rejected
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