Re: swsusp and suspend2 like to overheat my laptop

From: Andreas Mohr
Date: Wed Aug 09 2006 - 08:05:13 EST

On Wed, Aug 09, 2006 at 07:45:23AM -0400, Steven Rostedt wrote:
> It does look like something isn't setting up the ACPI power properly on
> resume, and that the CPU is probably in a busy loop while the machine is
> idle. Just a guess.

In that case could you post
cat /proc/acpi/processor/CPU?/*

Perhaps we're losing ACPI C2/C3 state power saving, and checking
the busmaster activity indicators there would be useful, too.

Oh, in this context maybe it's actually a problem of a misbehaving driver?
An active USB mouse is known to distort ACPI power saving, causing reduced
notebook battery operation length (due to busmaster activity preventing
ACPI idling, I think). Now what if some certain driver actually caused
permanent busmaster activity...?

Andreas Mohr
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at