linux-kernel - Re: [REGRESSION] i915: failure to see Dell 30" monitor connected to a Lenovo Haswell docking station

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Date:	Tue, 2 Sep 2014 09:13:52 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Dave Airlie <airlied@...il.com>
Cc:	Daniel Vetter <daniel.vetter@...ll.ch>,
	dri-devel <dri-devel@...ts.freedesktop.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Jani Nikula <jani.nikula@...el.com>
Subject: Re: [REGRESSION] i915: failure to see Dell 30" monitor connected to
 a Lenovo Haswell docking station

On Tue, Sep 02, 2014 at 09:23:16PM +1000, Dave Airlie wrote:
> 
> Interesting, I have the same combo of hw available on my desk at work,
> but it might be a couple of days before I can get to the office to
> debug it,
> 
> can you boot with drm.debug=6 and get me the dmesg?

I'll do that when I get home.  In the meantime, here's an additional
data point.  At work, I have the same model docking station connected
to a 2011 Dell 2410f Rev A04 (max resolution 1920x1200, and I suspect
not DP 1.2 capable; at least, it doesn't mention DP in monitor menu)
--- and connecting through the docking station, it does work
(connecting through either DVI or DisplayPort).

Here's the drm.debug=6 connecting to the docking station via DVI.  I
can get a drm.debug=6 connecting via the DP and the docking station if
that would be helpful.  Similarly, if you want, I can also try to get
a debug run connecting to the HP ZRW30 monitor (either direct or via
the docking station), since that's the monitor on the walkstation.  :-)

Cheers,

						- Ted


Download attachment "drm-debug.xz" of type "application/octet-stream" (27396 bytes)