Develop Module not scaling correctly

External GTX 1070. vs Internal MX250

Typical first diagnostic step and perhaps fix.

In LrC /preferences/performance, turn OFF the option to use graphics processor

Incidentally per the following link "Multiple graphics cards with conflicting drivers can cause problems with graphics processor accelerated features in Lightroom Classic"

• https://helpx.adobe.com/lightroom-classic/kb/lightroom-gpu-faq.html

Although in that article I think they are referring to actual GPU cards internal running two monitors. Not quite the same. And typically not the internal integrated video control vs a dedicated GPU. And normally in  a laptop with an actual GPU (internal) the GPU would handle both the laptop screen and the external. But of course that MX250 is way to pitiful for LrC, hence the eGPU. Other than turning off use graphics processor, I doubt the additional steps in the above link will apply.

As another note when attached to my external monitor it runs through an external GTX 1070.

My laptop specs are:

i7-10510U

16bg RAM

GPU: Nvida MX250

Drivers are updated often