Ubuntu 24.04 cannot click remote machine’s screen

[tashin]

I have upgraded my work PC with Ubuntu 24.04 from 22.04. Installed NoMachine as usual (9.3) and confronted issue with remote screen mouse click issue. The click actually registers on the remote side, but the screen does not update on Ubuntu 24.04. I can see my click worked after re-connecting to the same remote server.

The remote servers are still on Ubuntu 22.04 based distro (Pop! OS 22.04) and NoMachine connection works very well from other machines, including Windows, iPad, and Android versions and even 22.04 based Linux variants.

I’ve tried a few things:

1. Turning off hardware encoding

2. Turning off hardware acceleration

On/Off of each option do not matter on local Ubuntu 24.04. The remote screen click does not appear real time. Never happens anything like this on local 22.04 based Linux machines, nor on MacOS, Windows, mobile ones.

Please note that my Ubuntu 24.04 machine has kernel version of 6.14.

CPU: Ryzen 5 9600X – has integrated GPU

GPU: Radeon 7600 – Monitor is connected to this dGPU.

Linux Desktop: Gnome 46

I have not installed any AMDGPU related drivers. The machine is running on Linux Kernel provided driver. No ROCm installed either.

The the servers only have physical display for connection: Free versions. 9.18.

 

 

 

[Britgirl]

Hi, the disabling of HW encoding and HW acceleration should be done on the target host as a first attempt to debug the issue. If that didn’t change anything, it’s possible that the problem is actually on the client side, on the OS you are connecting from. In fact you mention that you can connect from other clients without problems. It is just the one Ubuntu 24.04 client is problematic.

Try disabling hardware decoding on the client side player menu while in session: Menu > Display settings > Modify> ”Disable client side hardware decoding”. Does this help?

[tashin]

Ok, that fixed the culprit.

[tashin]

Actually, I can now turn on the client side hardware decoding!! After installing AMDGPU driver from AMD by following this guide by AMD.

https://rocm.docs.amd.com/projects/install-on-linux/en/latest/install/install-methods/package-manager/package-manager-ubuntu.html

I think installing the ‘amdgpu-lib’ helped due to newer, and proper, Mesa driver being installed.

I also tried on another machine that runs Ubuntu 24.04 but this machine, a gaming laptop, runs with NVIDIA GPU.

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