Issue/update/FYI: Logging in to Ubuntu 20.04 LTS Desktop, with GRUB-defined screen resolution 1920 x 1080, causes lots of flickering during the login.
Ref. “Please notify us if you confirm that it is resolved or open a new topic if you have the same problem.” for issue https://forums.nomachine.com/topic/screen-artifacts-black-flickering#post-26340
- Client: MacOS Big Sur, NoMachine client app “Version 7.7.4 (7.7.4)”
- Target machine: Ubuntu 20.04 LTS Desktop, “apt-upgraded” as of 2021-10-24, running as a virtual machine under Hyper-V on Windows Server 2016 DataCenter. (Gen. 2 vm, no live migrations, single-NUMA, nothing special at all)
- Graphics: The Hypervisor host (WS-2016) does not have a discrete graphics card. There is no GPU passthrough. It’s just a plain vm.
This tends to happen if the vm has been viewed via the Windows Hyper-V manager, before using NoMachine to attach to the vm. I suppose some screen is created by that action, and the log-in goes crazy due to the dual screens (of which both are virtual, to be precise – one provided by Hyper-V and the other by NoMachine).