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SubjectRe: 2.6.21-rc1: T60 ACPI issues
> Quoting Hugh Dickins <hugh@veritas.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.

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