Intel graphics doesn't work

I have some laptop MSI GE62 6QC(i7-6700HQ +960m)

I installed KDE NEON and nvidia driver. On nvidia card all is work, but when i am switch to intel graphics and reboot. I have only black screen and nothing happens. What is the problem?

Try using kernel parameter

acpi_osi=! acpi_osi="Windows 2009"

It worked.

What do these parameters do?

It works around this bug: