[Bug 191291] New: [amdgpu] mouse cursor disappearing on X11 (KDE Plasma)

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=191291

            Bug ID: 191291
           Summary: [amdgpu] mouse cursor disappearing on X11 (KDE Plasma)
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.10-rc1
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: johannes.hirte at datenkhaos.de
        Regression: No

With kernel 4.10-rc1 the mouse cursor is disappearing under some circumstances.
It can be triggered by logging out from KDE5 Plasma session back to sddm login
manager. Other possibilities are waiting for DPM turning the screen of or
switching to console and back to X.

I was just guessing, but reverting

commit a1f49cc179ce6b7b7758ae3ff5cdb138d0ee0f56
Author: Flora Cui <Flora.Cui at amd.com>
Date:   Wed Dec 14 14:36:42 2016 +0800

    drm/amdgpu: fix cursor setting of dce6/dce8

    Fixes: 7c83d7abc999 ("drm/amdgpu: Only update the CUR_SIZE register when
                    necessary")
    Signed-off-by: Flora Cui <Flora.Cui at amd.com>
    Reviewed-by: Michel Dänzer <michel.daenzer at amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher at amd.com>

and 

commit 7c83d7abc9997cf1efac2c0ce384b5e8453ee870
Author: Michel Dänzer <michel.daenzer at amd.com>
Date:   Thu Oct 27 17:44:07 2016 +0900

    drm/amdgpu: Only update the CUR_SIZE register when necessary

    Normally only necessary when the cursor size changes.

    Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>
    Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher at amd.com>

fixed the problem for me.

hardware is
00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Carrizo (rev c5)

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