MIME-Version: 1.0
In-Reply-To: <s5htwslpria.wl-tiwai@suse.de>
References: <20150730004937.GA3133@thunk.org>
	<20150730013912.GA4068@thunk.org>
	<CA+55aFzsVMMpSeF3fG0FJ4Lhj1Tb6MY9LMfnmj7u1JyzM9aQuA@mail.gmail.com>
	<20150730144002.GY16722@phenom.ffwll.local>
	<20150730153228.GA15113@thunk.org>
	<s5htwslpria.wl-tiwai@suse.de>
Date: Thu, 30 Jul 2015 11:14:48 -0700
Message-ID: <CA+55aFxf=9gKtTcHvRAWD4sS_ti-whwgsBfB=NXSZgUGOXndVw@mail.gmail.com>
Subject: Re: [Intel-gfx] [REGRESSION] Re: i915 driver crashes on T540p if
 docking station attached
From: Linus Torvalds <torvalds@linux-foundation.org>
To: Takashi Iwai <tiwai@suse.de>
Cc: "Theodore Ts'o" <tytso@mit.edu>,
        intel-gfx <intel-gfx@lists.freedesktop.org>,
        DRI <dri-devel@lists.freedesktop.org>,
        Daniel Vetter <daniel.vetter@intel.com>,
        Mani Nikula <jani.nikula@linux.intel.com>,
        Ander Conselvan de Oliveira 
	<ander.conselvan.de.oliveira@intel.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Content-Type: text/plain; charset=UTF-8
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1480
Lines: 33

On Thu, Jul 30, 2015 at 8:57 AM, Takashi Iwai <tiwai@suse.de> wrote:
> On Thu, 30 Jul 2015 17:32:28 +0200,
> Theodore Ts'o wrote:
>>
>> BTW, is there any chance that I can suspend my laptop, and then move
>> it from my docking station at home (where I have a Dell 30" display)
>> to my docking station at work (where I have a Dell 24" display), and
>> actually have the new monitor be detected?  For at least the past
>> year, I have to reboot in order to be able to use the external
>> monitor?  This used to work, but it's been a very long-standing
>> regression.  I undrstand that Multi-stream DP is a evil horrible hack,
>> and supporting it is painful, but this used to work, and it hasn't in
>> a long time.  :-(
>
> Relevant with this?
>    https://bugs.freedesktop.org/show_bug.cgi?id=89589
>
> I wanted to check this by myself, too, as the same bug was reported to
> openSUSE bugzilla, but I had no hardware showing it.

Hmm. That commit e7d6f7d70829 looks like it should still revert fairly
cleanly (just move the call to intel_dp_mst_resume() to before the
intel_modeset_setup_hw_state() call and locking).

Ted, worth checking out, even if that presumably ends up
re-introducing some WARN_ON's..

                    Linus
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/