ThinkPad support

[Eric McCorkle]

On 09/17/2014 06:09, Ian Smith wrote:
> On Tue, 16 Sep 2014 22:38:35 +0100, isdtor wrote:
>
> [.. I can't comment on your devd issue/s ..]
>
>   > Sep 16 21:48:23 host kernel: pci0: failed to set ACPI power state D2 on
>   > \_SB_.PCI0.EXP1: AE_BAD_PARAMETER
>
> This appears to be common to all Thinkpads for the last 6 years or so,
> when booting with verbose messages. This message is emitted late on the
> suspend path, and seems to indicate some device that has advertised D2
> as an available state, where D2 isn't apparently really supported.

Chiming in late here...

I see this on mine.  I had thought it was the source of some problems, 
but I traced examined ACPI debugging traces (at a very high debugging 
level), and found that it doesn't seem to be causing any problems.  The 
ACPI methods execute and finish without errors.

>
> On the resume path, not much later in the messages sequence, you should
> see power being set back to D0 state, successfully.  Perhaps - as in the
> case of my X200 - twice in a row, for devices \_SB_.PCI0.EXP0 thru .EXP3
>
> I don't know if this failure means that the device was left in D0 state
> (run) or in D3 state (off) when power was removed in S3 suspend state.
>
> I never have been able to connect the dots between these .EXPn devices
> and particular PCI devices in dmesg.  So far they appear to be harmless.
>
> cheers, Ian
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