linux-kernel - Re: 2.6.21-rc1: T60 ACPI issues

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Date:	Wed, 1 Aug 2007 17:56:07 +0300
From:	"Michael S. Tsirkin" <mst@....mellanox.co.il>
To:	Hugh Dickins <hugh@...itas.com>
Cc:	"Michael S. Tsirkin" <mst@....mellanox.co.il>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	len.brown@...el.com, linux-acpi@...r.kernel.org,
	Ingo Molnar <mingo@...e.hu>, mingo@...hat.com,
	linux-pm@...ux-foundation.org,
	Borislav Deianov <borislav@...rs.sf.net>,
	Henrique de Moraes Holschuh <hmh@....eng.br>
Subject: Re: 2.6.21-rc1: T60 ACPI issues

> Quoting Hugh Dickins <hugh@...itas.com>:
> Subject: Re: 2.6.21-rc1: T60 ACPI issues
> 
> On Wed, 1 Aug 2007, Michael S. Tsirkin wrote:
> 
> > Hi!
> > ACPI appears to have been broken with 2.6.23-rc1 on my T60
> > Userspace from ubuntu dapper.
> 
> (Whereas I'm using a T43p with openSUSE 10.2.)
> 
> > 
> > 1. During boot, I see a lot of messages like this:
> > [   41.034204] acpi LNXSYSTM:00: uevent: unsupported action-string; this will be ignored in a future kernel version
> 
> (I've not seen those.)
> 
> > 
> > 2. Pressing Fn/F4 does not trigger suspend to ram
> >    This normally triigers ACPI event which triggers suspend to RAM on Ubuntu
> >    (echo mem > /sys/power/state works)
> 
> I'll bet this is your CONFIG_THINKPAD_ACPI_INPUT_ENABLED=y.
> I got the same, see my "THINKPAD_ACPI_INPUT_ENABLED seems regressive"
> mail to Henrique and lkml an hour ago.

This? http://lkml.org/lkml/2007/8/1/176


> > 
> > 3. After suspend to RAM, system wakes up but laptop's screen is blank,
> >    switching VTs etc does not help.
> >    External screen wakes up OK though.
> >    dmesg output from boot attached.
> 
> (I've not had that.)

Bingo.
sudo rmmod thinkpad_acpi cures both 2 and 3.
Thanks for pointing this out.

Henrique, if there's a patch to test, pls let me know.
Or maybe CONFIG_THINKPAD_ACPI_INPUT_ENABLED should be N by default.

-- 
MST
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