[Bug 107465] Weird resolution

[Bug 107465] Weird resolution

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=107465

            Bug ID: 107465
           Summary: Weird resolution
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: germano.massullo@gmail.com

Videocard: RX480
OS: Fedora 28 KDE
Kernel 4.17.9-200.fc28.x86_64

Sometimes when I poweroff the screen, then after some time I turn on it again,
the system cannot recognize native screen resolution, and sets it to a weird
one. In Plasma system settings, the monitor name is unknown and the native
resolution is missing (1600x1050), other resolutions are available instead..
After playing with some resolutions, suddendly the screen name (ViewSonic etc.)
returns back.

MrCooper user in #radeon Freenode chat, suggested me to start the system with
amdgpu.dc=0 flag. 24 hours of testing seems to confirm that such flag fixes the
problem.

I attach dmesg and xorg.0.log of system experiencing the problem

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[Bug 107465] Weird resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=107465

--- Comment #1 from Germano Massullo <germano.massullo@gmail.com> ---
Created attachment 140947
  --> https://bugs.freedesktop.org/attachment.cgi?id=140947&action=edit
Xorg.0.log

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[Bug 107465] Weird resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=107465

--- Comment #2 from Germano Massullo <germano.massullo@gmail.com> ---
Created attachment 140948
  --> https://bugs.freedesktop.org/attachment.cgi?id=140948&action=edit
dmesg

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[Bug 107465] System does not recognize native screen resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=107465

Germano Massullo <germano.massullo@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Weird resolution            |System does not recognize
                   |                            |native screen resolution

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[Bug 107465] System does not recognize native screen resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=107465

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #140947|text/x-log                  |text/plain
          mime type|                            |

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[Bug 107465] amdgpu.dc=1 triggers graphic card not recognizing native screen resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=107465

Germano Massullo <germano.massullo@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|System does not recognize   |amdgpu.dc=1 triggers
                   |native screen resolution    |graphic card not
                   |                            |recognizing native screen
                   |                            |resolution

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[Bug 107465] amdgpu.dc=1 triggers graphic card not recognizing native screen resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=107465

--- Comment #3 from Germano Massullo <germano.massullo@gmail.com> ---
Just a clarification: title "amdgpu.dc=1" is not meant as having amdgpu.dc=1 as
setted boot parameter, the situation is:
no boot parameter = problem triggered
amdgpu.dc=0 = no problem

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[Bug 107465] amdgpu.dc=1 triggers graphic card not recognizing native screen resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=107465

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

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

--- Comment #4 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/471.

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