linux-kernel - Re: Dell XPS13 does not suspend with Linux 4.10-rc3

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Date:   Tue, 10 Jan 2017 21:43:31 +0100
From:   Jan Niehusmann <jan@...dor.com>
To:     Paul Menzel <pmenzel@...gen.mpg.de>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Thorsten Leemhuis <linux@...mhuis.info>,
        Daniel Blueman <daniel@...ra.org>,
        Len Brown <len.brown@...el.com>
Subject: Re: Dell XPS13 does not suspend with Linux 4.10-rc3

Hi,

On Tue, Jan 10, 2017 at 03:08:32PM +0100, Paul Menzel wrote:
> Testing Linux 4.10-rc{1,2,3} the Dell XPS13 does not suspend with the
> attached configuration. The screen turns black, but the power button never
> goes dark. The white light stays always on.

Same here.
And I bisected the issue to commit 7279b238ba, "mei: send OS type to the
FW"

Suspending from the console with no_console_suspend shows that the last
message is "e1000e: EEE TX LPI TIMER: 00000000" (which is probably
unrelated).

More interesting is the first message missing, ie. the one after the one
mentioned when using a working kernel: "ACPI : EC: event blocked".

This seems to be related to the bisected commit. Maybe it's not even the
kernel's fault, but the EC just happens to change it's behavior when it
got told about the OS type, before?

Jan