OK, I've figured out a terrible hack that seems to solve the problem
(although it generates constant damage and constant CPU usage):
_X_EXPORT RegionPtr
xmir_window_get_dirty(xmir_window *xmir_win)
{
return &xmir_win->region; /* Terrible hack */
This seems to solve the bug, suggesting xmir_window_get_dirty is
returning incorrect damage regions.
It's not definitive and not a fix. But looks like good progress.
** Also affects: xorg-server (Ubuntu)
Importance: Undecided
Status: New
** Changed in: xorg-server (Ubuntu)
Status: New => Confirmed
** Changed in: xorg-server (Ubuntu)
Importance: Undecided => Critical
** Changed in: mir
Status: In Progress => Invalid
** Changed in: mir (Ubuntu)
Status: Confirmed => Invalid
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https://bugs.launchpad.net/bugs/1216472
Title:
[xmir] [multimonitor] Frames eventually get slightly out of order,
look like glitches or typing will feel slow
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