linux-kernel - Re: [Intel-gfx] External monitor issues with 3.17-rc4 and i915 module

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Date:	Thu, 18 Sep 2014 12:03:29 +0100
From:	"Carlos R. Mafra" <crmafra@...il.com>
To:	Jani Nikula <jani.nikula@...ux.intel.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	David Airlie <airlied@...ux.ie>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	intel-gfx@...ts.freedesktop.org
Subject: Re: [Intel-gfx] External monitor issues with 3.17-rc4 and i915	module

On Wed, 17 Sep 2014 at 11:39:57 +0300, Jani Nikula wrote:
> On Tue, 16 Sep 2014, "Carlos R. Mafra" <crmafra@...il.com> wrote:
> > Hi, the same happens with 3.17-rc5. The kernel is unfortunately
> > unusable with my external monitor because after some plug, unplug
> > and suspend to RAM cycles the behaviour is not good (sometimes
> > it freezes, sometimes X needs a restart).
> >
> > Sorry to ask, but is there someone looking at this? I can provide
> > more information if necessary.
> 
> Please file a new bug against DRM/Intel at [1] so we don't lose track of
> it.

https://bugs.freedesktop.org/show_bug.cgi?id=84038

> Is this a regression? Which version worked? Can you do a bisect?

On v3.16.1 the warning is different and I get fewer. On v3.12.18 it works,
but the kernel has other issues there related to wireless so I don't use
it that often.

I could try to bisect the first appearance of any warning, but it would
require some time (this is my work laptop).

> Please attach full dmesg with drm.debug=0xe module parameter set from
> early boot to the problem.

It is attached in the bug report at freedesktop now.
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