Bug 13461

Summary:	powertop reports frequent wakeups from PS/2 keyboard/mouse/touchpad
Product:	Power Management	Reporter:	Yann Simon (yann.simon.fr)
Component:	Other	Assignee:	power-management_other
Status:	CLOSED WILL_NOT_FIX
Severity:	low	CC:	alan, tpo_deb
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.30	Subsystem:
Regression:	No	Bisected commit-id:

Description Yann Simon 2009-06-05 13:06:22 UTC

When moving the cursor (with the mouse or the touchpad) in a X session, powertop reports frequent wakeups from PS/2 keyboard/mouse/touchpad.

For example:
Top causes for wakeups:
  60.1% (490.0) <interrupt> : PS/2 keyboard/mouse/touchpad

When stopping moving the cursor, these wakeups disappear.

This behaviour is present with older kernels too.

Other reports concerning this issue:
- https://bugs.freedesktop.org/show_bug.cgi?id=19736
- https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-synaptics/+bug/194489

Is powertop reports false?
Or is moving the cursor really waking up the computer so often?

Comment 1 Alan 2009-06-05 13:32:24 UTC

This is a hardware constraint. Fortunately it occurs when waving the mouse around not when idle.

Comment 2 Tomas Pospisek 2015-08-09 06:41:31 UTC

I think the resolution status of this bug could be changed to FIXED:

I am running the distro kernel 3.16.0-4 from and on Debian jessie here.

When not moving the mouse there is no noteworthy number of wakeups reported by powertop. When moving the mouse around it raises to ~190/s, which is much less then the originally reported ~450/s.

This bug report is referenced from other places (notably launchpad). Changing the status here would toggle the state in launchpad (and here) to actually indicate that this is not a problem any more.

Alain could please change the resolution status?

Comment 3 Alan 2015-08-09 11:34:33 UTC

It's closed correctly. If that confuses Launchpad then please file a bug with Ubuntu to fix launchpad. The numbers you get will depend on the systen,