[Bug 111851] New: Tearing-like effect with Linux 4.4.1

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=111851

            Bug ID: 111851
           Summary: Tearing-like effect with Linux 4.4.1
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.4.1
          Hardware: Intel
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - Intel)
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: linux at jonasplatte.de
                CC: intel-gfx-bugs at lists.freedesktop.org
        Regression: Yes

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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