Re: HPD flood warning since b8f102e8b

From: Jiri Kosina
Date: Thu Oct 24 2013 - 03:08:22 EST

On Mon, 21 Oct 2013, Egbert Eich wrote:

> > On Thu, 3 Oct 2013, Daniel Vetter wrote:
> >
> > > Can you please attach full dmesg from boot up to the first WARN with
> > > drm.debug=0xe? This really shouldn't happen and indicates a bug
> > > somewhere ...
> >
> > A bit difficult ... I originally thought that it was reliably
> > reproducible, but now I didn't get it after 10 suspend/resume cycles. Will
> > keep following it, and once it appears, will send you the dmesg.
> >
> Could you check if you get any messages regarding HPD storms after
> suspend/resume ie messages like:
> "[drm] HPD interrupt storm detected on connector HDMI-A-1"
> but without the annouing warn messages?

I have this:

[357128.184113] [drm] HPD interrupt storm detected on connector DP-3: switching from hotplug detection to polling

It appeared in the log approximately 5 seconds after resume has been


Jiri Kosina
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