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

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Date:	Wed, 1 Aug 2007 15:24:28 +0100 (BST)
From:	Hugh Dickins <hugh@...itas.com>
To:	"Michael S. Tsirkin" <mst@....mellanox.co.il>
cc:	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
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.

> 
> 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.)

Hugh
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