linux-kernel - Re: [Nouveau] 3.12rc1-pre Nouveau? oops

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Date:	Mon, 9 Sep 2013 08:29:05 +1000
From:	Dave Airlie <airlied@...il.com>
To:	Tobias Klausmann <tobias.johannes.klausmann@....thm.de>
Cc:	Ilia Mirkin <imirkin@...m.mit.edu>, Dave Airlie <airlied@...ux.ie>,
	nouveau <nouveau@...ts.freedesktop.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [Nouveau] 3.12rc1-pre Nouveau? oops

On Mon, Sep 9, 2013 at 8:01 AM, Tobias Klausmann
<tobias.johannes.klausmann@....thm.de> wrote:
>
> On 08.09.2013 23:33, Dave Airlie wrote:
>>>>
>>>> Looks like you have Optimus (intel + nvidia), and the backtrace has
>>>> runtime pm in it, which is something new Dave added for 3.12, adding
>>>> him in explicitly. The simplest explanation is that disp->init is
>>>> NULL. And it seems like there are no outputs from the earlier nouveau
>>>> init prints. I guess that the call to nouveau_display_resume from
>>>> nouveau_pmops_runtime_resume should be guarded by a if
>>>> (dev->mode_config.num_crtc) like it is everywhere else.
>>>>
>>>>    -ilia
>>>
>>> Your guess was right, this (hopefully attached patch) fixes it for me!
>>
>> Does it look like this one?
>>
>> Dave.
>
> No, mine was quick and dirty, reverted it and took yours. But i'm a little
> bit confused that this is a suspend/resume problem, i booted the kernel for
> the first time while seeing the oops. But anyway i tested it and it works.

It's runtime suspend/resume - so it turns the nvidia gpu off at boot since it
isn't being used.

you should see longer battery life.
Dave.
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