[Wayland-bugs] [Bug 98887] Random, one second blank external screen upon window activation or keypress

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98887

            Bug ID: 98887
           Summary: Random, one second blank external screen upon window
                    activation or keypress
           Product: Wayland
           Version: 1.5.0
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: wayland
          Assignee: wayland-bugs at lists.freedesktop.org
          Reporter: dylan.semler at gmail.com

Using Wayland and Mutter (the Gnome Shell compositor), my external monitor
turns black for approximately one second randomly.  The events correspond to
when I type or when the mouse cursor goes over a window, activating the window.
It doesn't happen every keypress or window activation and is more common after
the computer is idle for several seconds.  The occurrence is erratic and I've
not found a series steps to reliably reproduce the behavior.  Note that only
the external monitor turns black.

I have a video recording of the behavior[1] showing two black-out events.  The
first corresponds to a keypress and the second corresponds to a window
activation. I can't attach the video to the issue because I'm getting a 404
error when trying to download it from Google Photos.

When the screen blacks out, there are no new entries in the standard journalctl
logs nor in dmesg.

I am running Fedora 25 on Google Pixel 2015 which has an Intel HD Graphics 5500
card.  The external monitor is connected via USB-C and has a resolution of
2840x2160.

I do not experience his behavior running X11.

[1] https://goo.gl/photos/kb4hFSqPdSXcBMvw8

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