linux-kernel - Re: [PATCH 0/5] Fix deadlock on runtime suspend in DRM drivers

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Date:   Mon, 12 Feb 2018 04:39:47 +0100
From:   Lukas Wunner <lukas@...ner.de>
To:     Mike Lothian <mike@...eburn.co.uk>
Cc:     Tejun Heo <tj@...nel.org>, Lai Jiangshan <jiangshanlai@...il.com>,
        Alex Deucher <alexander.deucher@....com>,
        Dave Airlie <airlied@...hat.com>,
        Ben Skeggs <bskeggs@...hat.com>,
        Ismo Toijala <ismo.toijala@...il.com>,
        nouveau@...ts.freedesktop.org,
        Intel Graphics Development <intel-gfx@...ts.freedesktop.org>,
        Liviu Dudau <Liviu.Dudau@....com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Maling list - DRI developers 
        <dri-devel@...ts.freedesktop.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Peter Wu <peter@...ensteyn.nl>
Subject: Re: [PATCH 0/5] Fix deadlock on runtime suspend in DRM drivers

On Mon, Feb 12, 2018 at 12:35:51AM +0000, Mike Lothian wrote:
> I've not been able to reproduce the original problem you're trying to
> solve on amdgpu thats with or without your patch set and the above
> "trigger" too
> 
> Is anything else required to trigger it, I started multiple DRI_PRIME
> glxgears, in parallel, serial waiting the 12 seconds and serial within
> the 12 seconds and I couldn't reproduce it

The discrete GPU needs to runtime suspend, that's the trigger,
so no DRI_PRIME executables should be running.  Just let it
autosuspend after boot.  Do you see "waiting 12 sec" messages
in dmesg?  If not it's not autosuspending.

Thanks,

Lukas