[Bug 94017] New: Tearing-like effect with Linux 4.4.1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94017

            Bug ID: 94017
           Summary: Tearing-like effect with Linux 4.4.1
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: freedesktop at jonasplatte.de
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

(re-report of a bug in the kernel bugzilla:
https://bugzilla.kernel.org/show_bug.cgi?id=111851)

I had this really weird graphical issue when I upgraded to Linux 4.4.1, on my
desktop with Intel Iris Pro Graphics 6200 (I downgraded to 4.3.3, where this
does not happen):

Horizontal strips of pixels (up to maybe 100px high) shift to the right (up to
about 150px). It's not tearing, it notably didn't happen with video playback,
but did happen on empty workspaces and ones with normal desktop programs on
them.
It was always only below my mouse cursor, only on the screen that my cursor was
on (I have two monitors), so moving the cursor to the bottom of the screen
temporarily stopped this effect. It also sometimes disappeared completely until
I moved the cursor to the other monitor.

I reproduced this in i3 (X.org) and GNOME (Wayland). I also tried to make a
screencast of it, but when I played it back the effect wasn't there. I guess I
would need external display recording hardware.

I'm happy to help debugging if I can.

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