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 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1313539 Title: [DisplayPort] monitor shows black screen and "no input signal" after turning the monitor off and on manually To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1313539/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
