No video after enable CSM in bios

[amon-ra]

I have a medion akoya p6687, the laptop is working ok but after enter bios and enabling CSM boot option (to boot from an usb), I have lost all video in internal screen. My old os boots ( I have conected by network device) but screen is off.

Any help please?

[Burki48]

Hello @amon-ra and welcome to the community.

Do you have the possibility to connect an external monitor to your notebook to test if you then can see a picture if you set the CSM boot option to enable?

Greeting
Burki

[amon-ra]

Finally could disable CSM, 2.09 has broken CSM