Comment 44 for bug 1313539

I just ran into this problem when finally moving from a VGA KVM to StarTech Displayport dual KVM. I switch between my win10 work laptop and my Ubuntu Mate 17.10 desktop with GeForce GTX 1060. I can start up Ubuntu and display is as expected, then switch to the laptop and all ok there too.

When I switch back to Ubuntu the display is highly distorted. I switch to command line and restart, but the display will not come back initially, I'll have to hard power the machine and start it again, then my display returns. This only happens when using Displayport KVM. When I tried switching back to the VGA KVM all normal again.

Distributor ID: Ubuntu
Description: Ubuntu 17.10
Release: 17.10
Codename: artful

*-display
description: VGA compatible controller
product: GP106 [GeForce GTX 1060 6GB]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
configuration: driver=nouveau latency=0
resources: irq:26 memory:f6000000-f6ffffff memory:e0000000-efffffff memory:f0000000-f1ffffff ioport:e000(size=128) memory:c0000-dffff