linux-kernel - Re: tsc breaks atkbd suspend

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Date:	Tue, 19 Feb 2008 19:17:36 -0500
From:	Len Brown <lenb@...nel.org>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Ingo Molnar <mingo@...e.hu>, Pavel Machek <pavel@....cz>,
	Len Brown <len.brown@...el.com>,
	Linux-pm mailing list <linux-pm@...ts.osdl.org>,
	jbohac@...e.cz, kernel list <linux-kernel@...r.kernel.org>,
	jikos@...e.cz, "Rafael J. Wysocki" <rjw@...k.pl>,
	Andrew Morton <akpm@...l.org>
Subject: Re: tsc breaks atkbd suspend

On Tuesday 19 February 2008 11:51, Thomas Gleixner wrote:
> On Tue, 19 Feb 2008, Ingo Molnar wrote:
> > * Pavel Machek <pavel@....cz> wrote:
> > 
> > > TSC is used even on machines when CONFIG_X86_TSC is not set (X86_TSC 
> > > means _require_ TSC), but it is not properly disabled when it is 
> > > unusable, because acpi code understood the config switch as "may use 
> > > TSC".
> > > 
> > > This actually fixes suspend problems on my x60.
> > 
> > ah! This makes tons of sense. I've applied your patch

please do not.

> > - but i guess it  should go via the ACPI tree.

yes.

> Right. The breakage was introduced there when IA64 switched to
> GENERIC_TIME and the X86_TSC dependency was added.

so do we need a patch for 2.6.23.stable and 2.6.24.stable?

thanks,
-Len
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