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

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Date:   Tue, 10 Jan 2017 23:24:38 +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>,
        Tomas Winkler <tomas.winkler@...el.com>,
        Alexander Usyskin <alexander.usyskin@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: Dell XPS13 does not suspend with Linux 4.10-rc3

On Tue, Jan 10, 2017 at 09:43:31PM +0100, Jan Niehusmann wrote:
> And I bisected the issue to commit 7279b238ba, "mei: send OS type to the
> FW"

Indeed, just disabling the FIXUP implemented by that commit fixes
suspend for me, with 4.10.0-rc3. Btw, this is on a Thinkpad x201s.

(For the addressees newly added to cc, it seems like the mentioned
commit breaks suspend to ram on Dell XPS13 and Thinkpad x201s)

--- a/drivers/misc/mei/bus-fixup.c
+++ b/drivers/misc/mei/bus-fixup.c
@@ -406,3 +406,3 @@ static struct mei_fixup {
        MEI_FIXUP(MEI_UUID_WD, mei_wd),
-       MEI_FIXUP(MEI_UUID_MKHIF_FIX, mei_mkhi_fix),
+//     MEI_FIXUP(MEI_UUID_MKHIF_FIX, mei_mkhi_fix),
 };


I don't know what this may break, as the description of 7279b23 just
says:
"This workaround was added to support other broken OS and we need to
follow here."

Unless there is a better justification, I think the commit should be
reverted, for now.

Jan