[Bug 107863] Kernel panic when external monitors go blank

[Bug 107863] Kernel panic when external monitors go blank

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=107863

            Bug ID: 107863
           Summary: Kernel panic when external monitors go blank
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: bugs@i--b.com

Created attachment 141478
  --> https://bugs.freedesktop.org/attachment.cgi?id=141478&action=edit
kernel panic

This is a follow-up from bug
https://bugs.freedesktop.org/show_bug.cgi?id=105018. If I leave my laptop in
its dock (one HDMI and one DisplayPort) it has a high chance of kernel
panicking when DPMS turns the displays off. This affects my Dell Precision 7720
with a Radeon Pro WX 7100 on Archlinux, kernel 4.18.5. My boot parameters
include amdgpu.dc=1 (a redundant option nowadays, I know, I forgot to remove
this option). Suspend/resume work are fine, this happens only immediately after
idle blanking. As far as I can tell this does not occur when using only the
laptop screen but I could be wrong as I spend the majority of my time on the
dock.


I've attached a kernel log. For now I work around the issue by disabling dpms
entirely.

Thank you!

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[Bug 107863] Kernel panic when external monitors go blank

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=107863

--- Comment #1 from Ainola <bugs@i--b.com> ---
I should also note that a very similar software (desktop) setup with a Vega 64
card has no such issue with an external displayport monitor.

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[Bug 107863] Kernel panic when external monitors go blank

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=107863

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #141478|text/x-log                  |text/plain
          mime type|                            |

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[Bug 107863] Kernel panic when external monitors go blank

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https://bugs.freedesktop.org/show_bug.cgi?id=107863

Martin Peres <martin.peres@free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |MOVED
             Status|NEW                         |RESOLVED

--- Comment #2 from Martin Peres <martin.peres@free.fr> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/517.

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