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 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1278223 Title: Mouse Flickering after adding 3rd Monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1278223/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs