linux-kernel - Re: WARNING: /usr/projects/linux/linux/drivers/gpu/drm/i915/intel_pm.c:6585 intel_display_power

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20141215132602.GI17575@thunk.org>
Date:	Mon, 15 Dec 2014 08:26:02 -0500
From:	Theodore Ts'o <tytso@....edu>
To:	Dave Airlie <airlied@...il.com>,
	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: WARNING:
 /usr/projects/linux/linux/drivers/gpu/drm/i915/intel_pm.c:6585
 intel_display_power_put+0x4b/0x116 [i915]()

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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/