* [Bug 217545] New: Serious regression on amdgpu (drm_display_helper/drm_dp_atomic_find_time_slots) with two DisplayPort connected via a HP G5 docking station
@ 2023-06-12 14:15 bugzilla-daemon
2023-06-12 14:15 ` [Bug 217545] " bugzilla-daemon
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: bugzilla-daemon @ 2023-06-12 14:15 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=217545
Bug ID: 217545
Summary: Serious regression on amdgpu
(drm_display_helper/drm_dp_atomic_find_time_slots)
with two DisplayPort connected via a HP G5 docking
station
Product: Drivers
Version: 2.5
Kernel Version: 6.1
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P3
Component: Video(DRI - non Intel)
Assignee: drivers_video-dri@kernel-bugs.osdl.org
Reporter: bugzilla.kernel.bpeb@manchmal.in-ulm.de
Regression: Yes
Created attachment 304404
--> https://bugzilla.kernel.org/attachment.cgi?id=304404&action=edit
lscpi
This was previously mentioned in comment 69 in
https://bugzilla.kernel.org/show_bug.cgi?id=204181 but I reckon it's a
different story.
Hardware:
* Notebook hp mt45 with
03:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Picasso/Raven 2 [Radeon Vega Series / Radeon Vega Mobile Series]
[1002:15d8] (rev d3)
Also briefly confirmed with a Thinkpad T495 with
06:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Picasso/Raven 2 [Radeon Vega Series / Radeon Vega Mobile Series]
[1002:15d8] (rev d2)
* HP G5 USB-C docking station (HSN-IX02)
Problem:
After upgrading from kernel 6.0 to 6.1, the host crashes once a *second*
external display is connected via DisplayPort on that docking station:
BUG: kernel NULL pointer dereference, address: 0000000000000008
RIP: 0010:drm_dp_atomic_find_time_slots+0x47/0x250 [drm_display_helper]
(see attachment for full log)
Another way to reproduce this:
* Use the Ubuntu 23.04 installer/test image.
* Boot with displays disconnected.
* Select "Try Ubuntu".
* Connect displays.
* Upon connecting the second display, the system freezes.
Insights found after bisecting:
* This was introduced with commit
commit a5c2c0d164e96d24f73faffcd3b7bbb607e701a9
Author: Lyude Paul <lyude@redhat.com>
Date: Wed Aug 17 15:38:37 2022 -0400
drm/display/dp_mst: Add nonblocking helpers for DP MST
* Later this was half-fixed with commit
commit efa4c4df864ecd969670093524d3e8f69188e5eb
Author: Harry Wentland <harry.wentland@amd.com>
Date: Mon Feb 13 17:36:55 2023 -0500
drm/amd/display: call remove_stream_from_ctx from res_pool funcs
Now the notebook no longer crashes, however the displays remain dark although
from the operating system's point of view they are connected and should show
some content. This may or may not be a userland problem. (Aside: This commit
should be backported to the 6.1 stable series. It applies and likewise reduces
the problem from "crash" to "dark screens" there.)
This situation still exists with 6.4-rc6 (released last night)
Please advise if there's anything else we can do.
Find attached:
* lscpi
* dmesg (with drm.debug=4)
* kernel.log (the actual crash)
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* [Bug 217545] Serious regression on amdgpu (drm_display_helper/drm_dp_atomic_find_time_slots) with two DisplayPort connected via a HP G5 docking station
2023-06-12 14:15 [Bug 217545] New: Serious regression on amdgpu (drm_display_helper/drm_dp_atomic_find_time_slots) with two DisplayPort connected via a HP G5 docking station bugzilla-daemon
@ 2023-06-12 14:15 ` bugzilla-daemon
2023-06-12 14:15 ` bugzilla-daemon
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: bugzilla-daemon @ 2023-06-12 14:15 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=217545
--- Comment #1 from Christoph Biedl (bugzilla.kernel.bpeb@manchmal.in-ulm.de) ---
Created attachment 304405
--> https://bugzilla.kernel.org/attachment.cgi?id=304405&action=edit
dmesg
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* [Bug 217545] Serious regression on amdgpu (drm_display_helper/drm_dp_atomic_find_time_slots) with two DisplayPort connected via a HP G5 docking station
2023-06-12 14:15 [Bug 217545] New: Serious regression on amdgpu (drm_display_helper/drm_dp_atomic_find_time_slots) with two DisplayPort connected via a HP G5 docking station bugzilla-daemon
2023-06-12 14:15 ` [Bug 217545] " bugzilla-daemon
@ 2023-06-12 14:15 ` bugzilla-daemon
2023-06-12 14:22 ` bugzilla-daemon
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: bugzilla-daemon @ 2023-06-12 14:15 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=217545
--- Comment #2 from Christoph Biedl (bugzilla.kernel.bpeb@manchmal.in-ulm.de) ---
Created attachment 304406
--> https://bugzilla.kernel.org/attachment.cgi?id=304406&action=edit
kernel.log
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* [Bug 217545] Serious regression on amdgpu (drm_display_helper/drm_dp_atomic_find_time_slots) with two DisplayPort connected via a HP G5 docking station
2023-06-12 14:15 [Bug 217545] New: Serious regression on amdgpu (drm_display_helper/drm_dp_atomic_find_time_slots) with two DisplayPort connected via a HP G5 docking station bugzilla-daemon
2023-06-12 14:15 ` [Bug 217545] " bugzilla-daemon
2023-06-12 14:15 ` bugzilla-daemon
@ 2023-06-12 14:22 ` bugzilla-daemon
2023-06-13 7:41 ` bugzilla-daemon
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: bugzilla-daemon @ 2023-06-12 14:22 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=217545
Alex Deucher (alexdeucher@gmail.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |alexdeucher@gmail.com
--- Comment #3 from Alex Deucher (alexdeucher@gmail.com) ---
Please see: https://gitlab.freedesktop.org/drm/amd/-/issues/2492
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* [Bug 217545] Serious regression on amdgpu (drm_display_helper/drm_dp_atomic_find_time_slots) with two DisplayPort connected via a HP G5 docking station
2023-06-12 14:15 [Bug 217545] New: Serious regression on amdgpu (drm_display_helper/drm_dp_atomic_find_time_slots) with two DisplayPort connected via a HP G5 docking station bugzilla-daemon
` (2 preceding siblings ...)
2023-06-12 14:22 ` bugzilla-daemon
@ 2023-06-13 7:41 ` bugzilla-daemon
2023-06-14 9:28 ` bugzilla-daemon
2023-06-16 16:17 ` bugzilla-daemon
5 siblings, 0 replies; 7+ messages in thread
From: bugzilla-daemon @ 2023-06-13 7:41 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=217545
--- Comment #4 from Christoph Biedl (bugzilla.kernel.bpeb@manchmal.in-ulm.de) ---
Thanks, seems my search-foo didn't find that one.
FWIW, the mentioned fix
https://github.com/jlindgren90/linux/commit/8cf17c25e2d2644fa6dfc3d7de6b3b35689d4db0.patch
solves the problem for me (on top of 6.1.30).
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* [Bug 217545] Serious regression on amdgpu (drm_display_helper/drm_dp_atomic_find_time_slots) with two DisplayPort connected via a HP G5 docking station
2023-06-12 14:15 [Bug 217545] New: Serious regression on amdgpu (drm_display_helper/drm_dp_atomic_find_time_slots) with two DisplayPort connected via a HP G5 docking station bugzilla-daemon
` (3 preceding siblings ...)
2023-06-13 7:41 ` bugzilla-daemon
@ 2023-06-14 9:28 ` bugzilla-daemon
2023-06-16 16:17 ` bugzilla-daemon
5 siblings, 0 replies; 7+ messages in thread
From: bugzilla-daemon @ 2023-06-14 9:28 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=217545
Artem S. Tashkinov (aros@gmx.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |ANSWERED
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* [Bug 217545] Serious regression on amdgpu (drm_display_helper/drm_dp_atomic_find_time_slots) with two DisplayPort connected via a HP G5 docking station
2023-06-12 14:15 [Bug 217545] New: Serious regression on amdgpu (drm_display_helper/drm_dp_atomic_find_time_slots) with two DisplayPort connected via a HP G5 docking station bugzilla-daemon
` (4 preceding siblings ...)
2023-06-14 9:28 ` bugzilla-daemon
@ 2023-06-16 16:17 ` bugzilla-daemon
5 siblings, 0 replies; 7+ messages in thread
From: bugzilla-daemon @ 2023-06-16 16:17 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=217545
--- Comment #5 from Christoph Biedl (bugzilla.kernel.bpeb@manchmal.in-ulm.de) ---
Dear future reader, please be reminded this is still an ongoing issue, or as
written in the drm/amd ticket: "this patch is just papering over underlying
issues". So while it makes that specific setup usable, the ultimate fix is
still not available yet. Check on the other bug tracker, or re-try newer kernel
releases.
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