From: Jani Nikula <jani.nikula@linux.intel.com>
To: Klaus Ethgen <Klaus+lkml@ethgen.de>, linux-kernel@vger.kernel.org
Cc: dri-devel <dri-devel@lists.freedesktop.org>,
        "intel-gfx\@lists.freedesktop.org" <intel-gfx@lists.freedesktop.org>
Subject: Re: [KERNEL] Regression bug in drm/i915, Wrong assumption in commit e11aa36  breaks suspend on at least lenovo x61
In-Reply-To: <20150217082937.GA27873@ikki.ethgen.ch>
Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo
References: <20150211113919.GA5672@ikki.ethgen.ch> <20150216221142.GB14602@ikki.ethgen.ch> <20150217082937.GA27873@ikki.ethgen.ch>
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Date: Wed, 18 Feb 2015 17:39:20 +0200
Message-ID: <87mw4bw7o7.fsf@intel.com>
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On Tue, 17 Feb 2015, Klaus Ethgen <Klaus+lkml@ethgen.de> wrote:
> After solving  the conflicts, I applied the revert (see attachment) to
> v3.18.7. I think it should also apply to the current head. With that
> patch, suspend is working again on that version.
>
> However, I have not to deep knowledge of that subsystem, so please,
> someone who have, have a deeper look into it. I especially do not know
> if the lines in .../intel_pm.c are correct or better leaving them as
> they are in v3.18.7.
>
> I want to have it working on a version that I know is stable before
> asking to pull it to head.

Hi Klaus, we fear this patch may hide the actual cause. Would be useful
to get a better description of what happens, along with a dmesg with
drm.debug=14 module parameter set. This might clutter the mailing list,
would you mind filing a bug at [1] and attach the info there?

Thanks,
Jani.

[1] https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel


-- 
Jani Nikula, Intel Open Source Technology Center
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