From mboxrd@z Thu Jan 1 00:00:00 1970 From: Theodore Ts'o Subject: Re: WARNING: /usr/projects/linux/linux/drivers/gpu/drm/i915/intel_pm.c:6585 intel_display_power_put+0x4b/0x116 [i915]() Date: Mon, 15 Dec 2014 08:26:02 -0500 Message-ID: <20141215132602.GI17575@thunk.org> References: <20140902040527.GA5508@thunk.org> <20141208003433.GA3353@thunk.org> <20141208040829.GA5142@thunk.org> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from imap.thunk.org (imap.thunk.org [74.207.234.97]) by gabe.freedesktop.org (Postfix) with ESMTP id 0BAC16E0C4 for ; Mon, 15 Dec 2014 05:26:06 -0800 (PST) Content-Disposition: inline In-Reply-To: <20141208040829.GA5142@thunk.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Dave Airlie , Daniel Vetter , dri-devel , LKML , Jani Nikula List-Id: dri-devel@lists.freedesktop.org VGhpcyBtb3JuaW5nLCBJIHdhcyBkb2NrZWQgYW5kIHVzaW5nIGEgRGVsbCAzMCIgbW9uaXRvci4g IEkKcmVjb25maWd1cmVkIHRoZSBYIHNlcnZlciB0byBzdG9wIHNlbmRpbmcgdmlkZW8gdG8gdGhl IGV4dGVybmFsCm1vbml0b3IsIHN1c3BlbmRlZCB0aGUgbGFwdG9wLCBhbmQgYWZ0ZXIgaXQgd2Fz IHN1c3BlbmRlZCB1bmRvY2tlZCBpdAphbmQgdG9vayBpdCB0byB3b3JrLiAgVGhlbiBJIGRvY2tl ZCBpdCBhdCB3b3JrLCB3aGVyZSBpdCB3YXMgY29ubmVjdGVkCnRvIGEgcG93ZXJlZCBvZmYgRGVs bCAyNCIgbW9uaXRvci4KClNpbmNlIHRoaXMgdGltZSB0aGVyZSB3YXMgYSBub3RlOgoKW2RybV0g R1BVIGhhbmdzIGNhbiBpbmRpY2F0ZSBhIGJ1ZyBhbnl3aGVyZSBpbiB0aGUgZW50aXJlIGdmeCBz dGFjaywgaW5jbHVkaW5nIHVzZXJzcGFjZS4KW2RybV0gUGxlYXNlIGZpbGUgYSBfbmV3XyBidWcg cmVwb3J0IG9uIGJ1Z3MuZnJlZWRlc2t0b3Aub3JnIGFnYWluc3QgRFJJIC0+IERSTS9JbnRlbApb ZHJtXSBkcm0vaTkxNSBkZXZlbG9wZXJzIGNhbiB0aGVuIHJlYXNzaWduIHRvIHRoZSByaWdodCBj b21wb25lbnQgaWYgaXQncyBub3QgYSBrZXJuZWwgaXNzdWUuCltkcm1dIFRoZSBncHUgY3Jhc2gg ZHVtcCBpcyByZXF1aXJlZCB0byBhbmFseXplIGdwdSBoYW5ncywgc28gcGxlYXNlIGFsd2F5cyBh dHRhY2ggaXQuCltkcm1dIEdQVSBjcmFzaCBkdW1wIHNhdmVkIHRvIC9zeXMvY2xhc3MvZHJtL2Nh cmQwL2Vycm9yCgpJJ3ZlIGZpbGVkOgoKCWh0dHBzOi8vYnVncy5mcmVlZGVza3RvcC5vcmcvc2hv d19idWcuY2dpP2lkPTg3MzI3CgpJIGRvIHdhbnQgdG8gbm90ZSB0aGF0IHRoaXMgaXMgb25seSBv bmUgb2YgbWFueSBkaWZmZXJlbnQgc3ltcHRvbXMgYW5kCmZhaWx1cmVzIHRoYXQgSSBhbSBzZWVp bmcuCgpCYXNpY2FsbHksIGFmdGVyIHN1c3BlbmRpbmcgYW5kIHJlc3VtaW5nLCBpZiBJIHVzZSBh biBleHRlcm5hbAptb25pdG9yLCBJIGhhdmUgdG8gYmUgcHJlcGFyZWQgdG8gcmVzdGFydCB0aGUg WCBzZXJ2ZXIgLS0tIGFuZApzb21ldGltZXMgdGhlIGtlcm5lbCB3aWxsIHNwb25hbmVvdXNseSBy ZWJvb3QsIHNvbWV0aW1lcyB3aGVuIEkgZG8Kc29tZXRoaW5nIGFzIHNpbXBsZSBhcyBhY2NpZGVu dGFsbHkgYnJ1c2hpbmcgYWdhaW5zdCB0aGUgcG93ZXIgc3dpdGNoCm9uIHRoZSBEZWxsIG1vbnRv ci4gICA6LSggICA6LSggICA6LSgKCgkJCQkJLSBUZWQKX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX18KZHJpLWRldmVsIG1haWxpbmcgbGlzdApkcmktZGV2ZWxA bGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHA6Ly9saXN0cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1h bi9saXN0aW5mby9kcmktZGV2ZWwK 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