From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750905AbaLON0L (ORCPT ); Mon, 15 Dec 2014 08:26:11 -0500 Received: from imap.thunk.org ([74.207.234.97]:56556 "EHLO imap.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750704AbaLON0I (ORCPT ); Mon, 15 Dec 2014 08:26:08 -0500 Date: Mon, 15 Dec 2014 08:26:02 -0500 From: "Theodore Ts'o" To: Dave Airlie , Daniel Vetter , dri-devel , LKML , Jani Nikula Subject: Re: WARNING: /usr/projects/linux/linux/drivers/gpu/drm/i915/intel_pm.c:6585 intel_display_power_put+0x4b/0x116 [i915]() Message-ID: <20141215132602.GI17575@thunk.org> Mail-Followup-To: Theodore Ts'o , Dave Airlie , Daniel Vetter , dri-devel , LKML , Jani Nikula References: <20140902040527.GA5508@thunk.org> <20141208003433.GA3353@thunk.org> <20141208040829.GA5142@thunk.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20141208040829.GA5142@thunk.org> User-Agent: Mutt/1.5.23 (2014-03-12) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: tytso@thunk.org X-SA-Exim-Scanned: No (on imap.thunk.org); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This morning, I was docked and using a Dell 30" monitor. I reconfigured the X server to stop sending video to the external monitor, suspended the laptop, and after it was suspended undocked it and took it to work. Then I docked it at work, where it was connected to a powered off Dell 24" monitor. Since this time there was a note: [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace. [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue. [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it. [drm] GPU crash dump saved to /sys/class/drm/card0/error I've filed: https://bugs.freedesktop.org/show_bug.cgi?id=87327 I do want to note that this is only one of many different symptoms and failures that I am seeing. Basically, after suspending and resuming, if I use an external monitor, I have to be prepared to restart the X server --- and sometimes the kernel will sponaneously reboot, sometimes when I do something as simple as accidentally brushing against the power switch on the Dell montor. :-( :-( :-( - Ted