same here, when monitor is plugged in I mouse coursor is flickering on
host display, additionally sometimes sites do not work correctly when on
screen 2, coursor is flickering too (but much less).

When I've tried to apply solution from #108 after the reboot the second
monitor was not detected at all, I had to revert back my settings.

-----

Ubuntu 16.04 version:
Linux 4.15.0-38-generic #41~16.04.1-Ubuntu SMP Wed Oct 10 20:16:04 UTC 2018 
x86_64 x86_64 x86_64 GNU/Linux

Graphic cards (when connected):
  *-display               
       description: VGA compatible controller
       product: Broadwell-U Integrated Graphics
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 09
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:44 memory:f6000000-f6ffffff memory:d0000000-dfffffff 
ioport:f000(size=64) memory:c0000-dffff
  *-display
       description: VGA compatible controller
       product: Opal XT [Radeon R7 M265]
       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
       physical id: 0
       bus info: pci@0000:08:00.0
       version: 00
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
       configuration: driver=radeon latency=0
       resources: irq:45 memory:e0000000-efffffff memory:f7000000-f703ffff 
ioport:e000(size=256) memory:f7040000-f705ffff

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https://bugs.launchpad.net/bugs/1278223

Title:
  Mouse Flickering after adding 3rd Monitor

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