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From: "Theodore Ts'o" <tytso@mit.edu>
To: Daniel Vetter <daniel.vetter@ffwll.ch>,
	dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
	Jani Nikula <jani.nikula@intel.com>
Subject: [REGRESSION] i915: failure to see Dell 30" monitor connected to a Lenovo Haswell docking station
Date: Tue, 2 Sep 2014 00:05:27 -0400	[thread overview]
Message-ID: <20140902040527.GA5508@thunk.org> (raw)

I recently upgraded to v3.17-rc3, and on my Lenovo T540p, I can no
longer see the my Dell 30" monitor when it is connected via the
docking station using a Displayport connector.  This worked using 3.16
kernel.

If I connect to the monitor using the mini-display, by passing the
docking station, things work fine (but of course it's annoying not to
be able to use the docking station).

Is this a known problem?  This is not the first time that we've had
regressions with this docking station.   It's vaguely reminsicent of 

	https://bugs.freedesktop.org/show_bug.cgi?id=71267

Except the system isn't hanging; it's just not seeing the monitor at all.

Thanks,

					- Ted



             reply	other threads:[~2014-09-02  4:05 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-09-02  4:05 Theodore Ts'o [this message]
2014-09-02  4:15 ` Dave Airlie
2014-09-02 11:03   ` Theodore Ts'o
2014-09-02 11:23     ` Dave Airlie
2014-09-02 13:13       ` Theodore Ts'o
2014-09-26  2:24   ` Theodore Ts'o
2014-12-08  0:34 ` WARNING: /usr/projects/linux/linux/drivers/gpu/drm/i915/intel_pm.c:6585 intel_display_power_put+0x4b/0x116 [i915]() Theodore Ts'o
2014-12-08  2:32   ` Dave Airlie
2014-12-08  4:08     ` Theodore Ts'o
2014-12-15 13:26       ` Theodore Ts'o

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