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Hello,

I've being trying to configure my laptop for the past couple of days but with no final success.
The laptop is Lenovo Legion Y740 with RTX 2070 Max-Q Design.

After installation of Ubuntu 18.04 the brightness control is not working - which is pretty terrible on 500nit display.
That's a common problem with all machines that has external GPU.

I installed the Nvidia drivers 435 (did a test with 440, no diff), but again the brightness control isn't working.
To make it work I had to change in the BIOS from "Switchable Graphics" to "Discrete Graphics".

But that let to another problem,
after sleep/hibernate Nvidia cannot start and all I'm getting is a black screen,
which can be resolved only with reboot.

Of course when "Switchable Graphics" is enabled the black screen is no longer a problem.

If anyone have encounter this problem, please share the details for resolving this?
05-03-2020, 04:18 AM
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