From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 111659] Kernel panic when waking up after screens go to dpms sleep Date: Mon, 28 Oct 2019 08:14:16 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0914603339==" Return-path: Received: from culpepper.freedesktop.org (culpepper.freedesktop.org [IPv6:2610:10:20:722:a800:ff:fe98:4b55]) by gabe.freedesktop.org (Postfix) with ESMTP id 7EB576E42F for ; Mon, 28 Oct 2019 08:14:16 +0000 (UTC) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org --===============0914603339== Content-Type: multipart/alternative; boundary="15722504560.0CE24DBcC.3703" Content-Transfer-Encoding: 7bit --15722504560.0CE24DBcC.3703 Date: Mon, 28 Oct 2019 08:14:16 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.freedesktop.org/ Auto-Submitted: auto-generated https://bugs.freedesktop.org/show_bug.cgi?id=3D111659 --- Comment #5 from Brad Campbell --- I was stating to suspect this might be a hardware problem, so I sourced a similar machine with a Radeon 6770M. Unfortunately the same fault exhibits. [ 2060.703207] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: radeon_dp_needs_link_train+0x69/0x70 [radeon] [ 2060.703221] CPU: 2 PID: 1386 Comm: kworker/2:2 Not tainted 5.3.4+ #19 [ 2060.703223] Hardware name: Apple Inc. iMac12,2/Mac-942B59F58194171B, BIOS 82.0.0.0.0 09/25/2018 [ 2060.703238] Workqueue: events radeon_dp_work_func [radeon] [ 2060.703241] Call Trace: [ 2060.703248] dump_stack+0x46/0x5b [ 2060.703253] panic+0xf3/0x288 [ 2060.703274] ? radeon_dp_needs_link_train+0x69/0x70 [radeon] [ 2060.703278] __stack_chk_fail+0x10/0x10 [ 2060.703294] radeon_dp_needs_link_train+0x69/0x70 [radeon] [ 2060.703308] radeon_connector_hotplug+0xa4/0xd0 [radeon] [ 2060.703323] radeon_dp_work_func+0x28/0x40 [radeon] [ 2060.703326] process_one_work+0x1b4/0x330 [ 2060.703329] worker_thread+0x44/0x3d0 [ 2060.703333] kthread+0xeb/0x120 [ 2060.703336] ? process_one_work+0x330/0x330 [ 2060.703338] ? kthread_park+0xa0/0xa0 [ 2060.703344] ret_from_fork+0x1f/0x30 [ 2060.703382] Kernel Offset: disabled [ 2060.703385] ---[ end Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: radeon_dp_needs_link_train+0x69/0x70 [radeon] ]--- I'm now at a bit of a loss as to how to debug it. I can reproduce it reliab= ly by playing a 1080p video on each head with mplayer and triggering the OSD (volume/brightness) changes. I can't bisect it with an earlier kernel becau= se it doesn't occur when using the internal panel, one Thunderbolt and one HDM= I, and the dual thunderbolt support only turned up in 5.2. --=20 You are receiving this mail because: You are the assignee for the bug.= --15722504560.0CE24DBcC.3703 Date: Mon, 28 Oct 2019 08:14:16 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.freedesktop.org/ Auto-Submitted: auto-generated

Commen= t # 5 on bug 11165= 9 from Brad Campbell 
I was stating to suspect this might be a hardware problem, so =
I sourced a
similar machine with a Radeon 6770M. Unfortunately the same fault exhibits.

[ 2060.703207] Kernel panic - not syncing: stack-protector: Kernel stack is
corrupted in: radeon_dp_needs_link_train+0x69/0x70 [radeon]
[ 2060.703221] CPU: 2 PID: 1386 Comm: kworker/2:2 Not tainted 5.3.4+ #19
[ 2060.703223] Hardware name: Apple Inc. iMac12,2/Mac-942B59F58194171B, BIOS
82.0.0.0.0 09/25/2018
[ 2060.703238] Workqueue: events radeon_dp_work_func [radeon]
[ 2060.703241] Call Trace:
[ 2060.703248]  dump_stack+0x46/0x5b
[ 2060.703253]  panic+0xf3/0x288
[ 2060.703274]  ? radeon_dp_needs_link_train+0x69/0x70 [radeon]
[ 2060.703278]  __stack_chk_fail+0x10/0x10
[ 2060.703294]  radeon_dp_needs_link_train+0x69/0x70 [radeon]
[ 2060.703308]  radeon_connector_hotplug+0xa4/0xd0 [radeon]
[ 2060.703323]  radeon_dp_work_func+0x28/0x40 [radeon]
[ 2060.703326]  process_one_work+0x1b4/0x330
[ 2060.703329]  worker_thread+0x44/0x3d0
[ 2060.703333]  kthread+0xeb/0x120
[ 2060.703336]  ? process_one_work+0x330/0x330
[ 2060.703338]  ? kthread_park+0xa0/0xa0
[ 2060.703344]  ret_from_fork+0x1f/0x30
[ 2060.703382] Kernel Offset: disabled
[ 2060.703385] ---[ end Kernel panic - not syncing: stack-protector: Kernel
stack is corrupted in: radeon_dp_needs_link_train+0x69/0x70 [radeon] ]---

I'm now at a bit of a loss as to how to debug it. I can reproduce it reliab=
ly
by playing a 1080p video on each head with mplayer and triggering the OSD
(volume/brightness) changes. I can't bisect it with an earlier kernel becau=
se
it doesn't occur when using the internal panel, one Thunderbolt and one HDM=
I,
and the dual thunderbolt support only turned up in 5.2.

You are receiving this mail because:
  • You are the assignee for the bug.
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