From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <stable-owner@vger.kernel.org>
Received: from mail.linuxfoundation.org ([140.211.169.12]:47290 "EHLO
	mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1751575AbcCGBOU (ORCPT
	<rfc822;stable@vger.kernel.org>); Sun, 6 Mar 2016 20:14:20 -0500
Date: Sun, 6 Mar 2016 17:14:19 -0800
From: Greg KH <gregkh@linuxfoundation.org>
To: =?iso-8859-1?Q?J=F6rg-Volker?= Peetz <jvpeetz@web.de>
Cc: linux-kernel@vger.kernel.org,
	Andrew Morton <akpm@linux-foundation.org>,
	torvalds@linux-foundation.org, stable@vger.kernel.org, lwn@lwn.net,
	Jiri Slaby <jslaby@suse.cz>,
	Alex Deucher <alexander.deucher@amd.com>
Subject: Re: Linux 4.4.4 [regression]
Message-ID: <20160307011419.GB6588@kroah.com>
References: <20160303233415.GA30194@kroah.com>
 <56DAB98D.6050305@web.de>
 <20160305174147.GB14401@kroah.com>
 <56DC2E27.2080006@web.de>
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
In-Reply-To: <56DC2E27.2080006@web.de>
Sender: stable-owner@vger.kernel.org
List-ID: <stable.vger.kernel.org>

On Sun, Mar 06, 2016 at 02:18:31PM +0100, J�rg-Volker Peetz wrote:
> Greg KH wrote on 03/05/16 18:41:
> >
> > Can you use 'git bisect' between 4.4.3 and 4.4.4 to track down the
> > offending patch?
> >
> > thanks,
> >
> > greg k-h
> >
> 
> It's one line of code that freezes X during start on my HP Pavilion dv7 hybrid
> graphic (AMD HD 42000 - AMD HD 5400):
> 
> # git bisect visualize
> commit b36e52c44ce6728824546d8b5f05b844cede96f1
> Author: Alex Deucher <alexander.deucher@amd.com>
> Date: Tue Nov 24 14:32:44 2015 -0500
> 
> drm/radeon: call hpd_irq_event on resume
> 
> commit dbb17a21c131eca94eb31136eee9a7fe5aff00d9 upstream.
> 
> Need to call this on resume if displays changes during
> suspend in order to properly be notified of changes.
> 
> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> 
> Removing the line inserted by this patch from 4.4.4 makes X on my laptop work again.
> Just for the records: with the above patch the laptop freezes during shutdown
> and has to be switched off by pressing the power button several seconds until
> power-off.

Ah, good to know.  Alex, any ideas?

Also, does this same problem also happen in 4.5-rc7?  If so, that's
good.  If not, I'm worried that I might have missed a fixup patch
somewhere.

thanks,

greg k-h