linux-kernel - Lenovo x120e resume regression in 3.15-rc1 bisected to 'drm/crtc-helpers: fix dpms on logic'

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Date:	Fri, 02 May 2014 10:40:49 -0600
From:	Tim Gardner <tim.gardner@...onical.com>
To:	daniel.vetter@...ll.ch
CC:	airlied@...hat.com, dan.carpenter@...cle.com,
	alexdeucher@...il.com, dri-devel@...ts.freedesktop.org,
	LKML <linux-kernel@...r.kernel.org>,
	kernel-team <kernel-team@...ts.ubuntu.com>
Subject: Lenovo x120e resume regression in 3.15-rc1 bisected to 'drm/crtc-helpers:
 fix dpms on logic'

I've bisected a resume regression on a Lenovo x120e to
177cf92de4aa97ec1435987e91696ed8b5023130 (drm/crtc-helpers: fix dpms on
logic). Everything works fine with this patch reverted on top of
3.15-rc3. I realize it is correcting a coding error that has been in
place since 3.11, but it is also causing this laptop to resume to a
black screen wherein the platform appears to be locked up (no console,
no network). See attached bisect log and lspci. The BIOS version is 1.15.

rtg
-- 
Tim Gardner tim.gardner@...onical.com

View attachment "BISECT_LOG" of type "text/plain" (1783 bytes)

View attachment "lspci.txt" of type "text/plain" (13233 bytes)