linux-kernel - [4.6-rcX regression] closing and opening LID on thinkpad x200s freezes X

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Message-ID: <alpine.LNX.2.00.1604062355320.27368@cbobk.fhfr.pm>
Date:	Thu, 7 Apr 2016 00:00:38 +0200 (CEST)
From:	Jiri Kosina <jikos@...nel.org>
To:	Daniel Vetter <daniel.vetter@...el.com>,
	Jani Nikula <jani.nikula@...ux.intel.com>,
	David Airlie <airlied@...ux.ie>
cc:	intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Subject: [4.6-rcX regression] closing and opening LID on thinkpad x200s
 freezes X

Hi,

after updating to 4.6-rcX (where X is 1 or 2, doesn't really matter) on 
thinkpad x200s notebook with

	00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)

closing and opening the lid freezes the computer completely (after opening 
the LID, I can see either the complete original contents of the screen, or 
silouhette of xscreensaver window decorations, but the machine is dead by 
then (neither ctrl-alt-backspace-backspace nor switching to text console 
doesn't work).

It definitely worked with older kernels, but I unfortunately don't have 
all the data needed for bisection, as the old kernels have been wiped off 
the machine in the meantime.

Is this a known issue?

Thanks,

-- 
Jiri Kosina
SUSE Labs