linux-kernel - Re: 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 12:30:45 -0600
From:	Tim Gardner <tim.gardner@...onical.com>
To:	Alex Deucher <alexdeucher@...il.com>
CC:	Daniel Vetter <daniel.vetter@...ll.ch>,
	Dave Airlie <airlied@...hat.com>,
	Dan Carpenter <dan.carpenter@...cle.com>,
	Maling list - DRI developers 
	<dri-devel@...ts.freedesktop.org>,
	LKML <linux-kernel@...r.kernel.org>,
	kernel-team <kernel-team@...ts.ubuntu.com>
Subject: Re: Lenovo x120e resume regression in 3.15-rc1 bisected to 'drm/crtc-helpers:
 fix dpms on logic'

On 05/02/2014 11:21 AM, Alex Deucher wrote:
> On Fri, May 2, 2014 at 12:40 PM, Tim Gardner <tim.gardner@...onical.com> wrote:
>> 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.
>>
> 
> Does the attached patch help?  I haven't had a chance to unwind all
> the logic in the crtc helper code.
> 
> Alex
> 

Nope, same symptom. Black screen on resume, no network, etc.

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