[Bug 197851] New: Resume from suspend sometimes results in black screen on Radeon R5

[Bug 197851] New: Resume from suspend sometimes results in black screen on Radeon R5

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=197851

            Bug ID: 197851
           Summary: Resume from suspend sometimes results in black screen
                    on Radeon R5
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.14.0-041400rc8-generic
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: sonarsoundapplications@gmail.com
        Regression: No

As stated in the description, resuming from suspend will occasionally result in
the screen remaining black until hard reset. I have pressed all of the keys,
clicked the mouse, and even held the power button for varying lengths of time.
It isn't just limited to screen lid closing either. Screen timeouts and manual
suspend also feature this issue. I saw a similar bug for a rx480 but figured
since it's a different GPU, it may need its own bug report. Feel free to merge
the issues if you think I am incorrect.

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[Bug 197851] Resume from suspend sometimes results in black screen on Radeon R5

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=197851

Alex Deucher (alexdeucher@gmail.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alexdeucher@gmail.com

--- Comment #1 from Alex Deucher (alexdeucher@gmail.com) ---
Please attach your xorg log and dmesg output.

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[Bug 197851] Resume from suspend sometimes results in black screen on Radeon R5

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=197851

--- Comment #2 from Tyler McLean (sonarsoundapplications@gmail.com) ---
Created attachment 260643
  --> https://bugzilla.kernel.org/attachment.cgi?id=260643&action=edit
Output from dmesg on a clean restart

Attached the dmesg output. Can't get Xorg though as I'm running a Wayland
environment

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[Bug 197851] Resume from suspend sometimes results in black screen on Radeon R5

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=197851

Tyler McLean (sonarsoundapplications@gmail.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Kernel Version|4.14.0-041400rc8-generic    |4.15.0-041500rc2-generic

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[Bug 197851] Resume from suspend sometimes results in black screen on Radeon R5

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=197851

Harry Wentland (harry.wentland@amd.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |harry.wentland@amd.com

--- Comment #3 from Harry Wentland (harry.wentland@amd.com) ---
Do you get different behavior if you enable the new DC display driver by
passing amdgpu.dc=1 to the kernel?

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[Bug 197851] Resume from suspend sometimes results in black screen on Radeon R5

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=197851

--- Comment #4 from Tyler McLean (sonarsoundapplications@gmail.com) ---
(In reply to Harry Wentland from comment #3)
> Do you get different behavior if you enable the new DC display driver by
> passing amdgpu.dc=1 to the kernel?

Enabling that on the kernel results in an error on boot

[drm:hwss_wait_for_blank_complete [amdgpu]] *ERROR* DC: failed to blank crtc!

causing Ubuntu to hang on the splash screen

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