BASICS: Laptop with GeForce G105M only boots to linux mint 19.3 in recovery mode

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I guess you confuse that with mobile networking.

I don’t think so.

After. Also the nomodeset parameter should be removed if present.

According to this:

You could try the 390 legacy driver…
Use this ppa: Proprietary GPU Drivers : “Graphics Drivers” team

Did that system work before with windows?