linux-kernel - RE: Linux 4.4.4 [regression]

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Date:	Wed, 9 Mar 2016 14:40:48 +0000
From:	"Deucher, Alexander" <Alexander.Deucher@....com>
To:	'Greg KH' <gregkh@...uxfoundation.org>,
	Jean Delvare <jdelvare@...e.de>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"torvalds@...ux-foundation.org" <torvalds@...ux-foundation.org>,
	"stable@...r.kernel.org" <stable@...r.kernel.org>,
	"lwn@....net" <lwn@....net>, Jiri Slaby <jslaby@...e.cz>,
	"Koenig, Christian" <Christian.Koenig@....com>,
	"Lazare, Jordan" <Jordan.Lazare@....com>
Subject: RE: Linux 4.4.4 [regression]

> -----Original Message-----
> From: Greg KH [mailto:gregkh@...uxfoundation.org]
> Sent: Tuesday, March 08, 2016 11:17 PM
> To: Jean Delvare
> Cc: linux-kernel@...r.kernel.org; Andrew Morton; torvalds@...ux-
> foundation.org; stable@...r.kernel.org; lwn@....net; Jiri Slaby; Koenig,
> Christian; Lazare, Jordan; Deucher, Alexander
> Subject: Re: Linux 4.4.4 [regression]
> 
> On Tue, Mar 08, 2016 at 09:48:02AM +0100, Jean Delvare wrote:
> > On Tue, 8 Mar 2016 09:16:13 +0100, Jean Delvare wrote:
> > > On Thu, 3 Mar 2016 15:34:15 -0800, Greg KH wrote:
> > > > I'm announcing the release of the 4.4.4 kernel.
> > > >
> > > > All users of the 4.4 kernel series must upgrade.
> > > > (...)
> > > > Alex Deucher (13):
> > > >       (...)
> > > >       drm/radeon/pm: adjust display configuration after powerstate
> > >
> > > I am getting a regression from 4.4.3 to 4.4.4, and biscection points to
> > > the above commit.
> > >
> > > http://git.kernel.org/cgit/linux/kernel/git/stable/linux-
> stable.git/commit/?h=linux-
> 4.4.y&id=a83b349814dee660caff0a40a22ac2f166c94a8b
> > >
> > > I have reported it in bugzilla:
> > > https://bugzilla.kernel.org/show_bug.cgi?id=113891
> > >
> > > Symptoms are a vertically jittering display with horizontal black
> > > stripes, pretty much all the time on almost every boot.
> > >
> > > This is with a Sapphire HD 6670 graphics card:
> > > 01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
> [AMD/ATI] Turks XT [Radeon HD 6670/7670] [1002:6758]
> >
> > I just tested v4.5-rc7 and it suffers from the same problem.
> 
> Wonderful, we are bug-compatible then :)
> 
> Radeon developers, can you all look into this?

Already reverted in my last pull request to Dave.

Alex