CloudCompare forum

Hello,

We are trying to run CC on Linux. We installed it from source on Ubuntu Server 20.04.3 with no errors. When we enter the command "CloudCompare -platform offscreen" we get the following error:

QSocketNotifier: Can only be used with threads started with QThread
This plugin does not support propagateSizeHints()

The packages libqt5svg5-dev, libqt5opengl5-dev, qt5-default qttools5-dev, qttools5-dev-tools, libqt5websockets5-devare are all installed and up to date.

Does anyone have a solution?

Best regards
Michael

Is it an error or just a warning?

Because another quite usual reason for CC not being able to start is the GPU driver (or the GPU itself, typically if it's an old intel chipset).

It is more of an error, as Cloud Compare is not working or doing anything. Does CC necessarily need a GPU for its calculation (sorry if that's a dumb question)?
We are using a R1F95C NVIDIA Quadro RTX 4000 Graphics, if that helps for the solution.

Well, Qt (the framework we use) requires a recent GPU. But a quadro RTX 4000 should work fine (at least if the driver is ok and found by Qt).