linux-kernel - Re: Linux 4.4.4 [regression]

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Message-ID: <20160308094802.2a263966@endymion>
Date:	Tue, 8 Mar 2016 09:48:02 +0100
From:	Jean Delvare <jdelvare@...e.de>
To:	Greg KH <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	torvalds@...ux-foundation.org, stable@...r.kernel.org, lwn@....net,
	Jiri Slaby <jslaby@...e.cz>,
	Christian König <christian.koenig@....com>,
	Jordan Lazare <Jordan.Lazare@....com>,
	Alex Deucher <alexander.deucher@....com>
Subject: Re: Linux 4.4.4 [regression]

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.

-- 
Jean Delvare
SUSE L3 Support