[Bug 110339] Cursor hides and reappear in the middle of screen, when moving mouse horizontally

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110339

            Bug ID: 110339
           Summary: Cursor hides and reappear in the middle of screen,
                    when moving mouse horizontally
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: j-pi at seznam.cz

Cursor gradually disappears and then reappears at once when moving mouse
horizontally. This happends on vertical line exactly in the center of the
screen. It creates impression there are 2 tiles on the screen, (left and
right). When mouse moves to the right edge of the left tile it gradually
"hides" under the one on the right side, when when the cursor is whole on the
right tile it "pop ups" again at once.

This happends even on external monitor, where resolution is different, it still
dissapears exactly in the center of the screen.

This does not happends when both monitors are used as outputs (orientation does
not matter, they can be left, right, above, bellow of each other or even
overlap). I did not find any horizontal line where the cursor "hides".

Also in some positions along the central line sometimes some artifacts appears,
when the mouse is partialy hidden. They change when the mouse moves in any
direction. But those are not always reproducible and in fact are rare.

I actually does not have an idea where the bug actually is (can be anywhere
along the pipeline including kernel).

This is on Lenovo A485 notebook with Arch linux.

mesa 19.0.1
xf86-video-amdgpu-git-19.0.1.0

[lspci]
06:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Raven
Ridge [Radeon Vega Series / Radeon Vega Mobile Series] (rev d1)

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