[Wayland-bugs] [Bug 95064] Mouse Cursor halts CPU for multiple display configurations i915 i5-5287U

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95064

            Bug ID: 95064
           Summary: Mouse Cursor halts CPU for multiple display
                    configurations i915 i5-5287U
           Product: Wayland
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: wayland
          Assignee: wayland-bugs at lists.freedesktop.org
          Reporter: ismail at inbox247.com

I have had lots of troubles with GNOME Shell halting the cpu requiring power
off.

I could provoke the same situation using the Weston reference implementation

Computer is MacBook Pro 2015 13"

Have external display to the right with display bottoms aligned
Launch a terminal window on the external display put it near lower left corner
around the lower right corner of the internal display move the mouse cursor
back and forth from the internal display to into the terminal window on the
external display

BUG
within about 30 s, cpu halts, computer has to be powered off
static video from the halt moment is displayed

Halting the cpu is not helpful at all

This problem did not exist in 1.08/15.10

The cause seems to be drawing the mouse cursor on multiple displays

without an external display no problems.

GNOME Shell does not crash until
- a window exists
https://bugzilla.gnome.org/show_bug.cgi?id=765285

There is some special handling of the mouse cursor on external displays within
and inch of a cross-display boundary
if a window edge is placed here, say a maximized window on the external
display, displaying a different mouse cursor shape, the mouse shape change
close to a cross-display boundary causes the halt to occur almost immediately

dpkg -s weston | egrep ^V
Version: 1.9.0-3
dpkg -s libwayland-server0 | egrep ^V
Version: 1.10.0-1~xenial0
lsb_release -sd
Ubuntu 16.04 LTS
uname -r
4.4.0-21-generic

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