I installed Pop_OS (Linux) alongside windows on my girlfriend's Acer spin 5 13i 52N-50AB. Worked fine, until I wanted to set Pop_OS as first boot-priority, in order to have GRUB Bootloader to choose the operating system to boot.
However, now every time I want to access the BIOS, regardless if via hitting FN and f2 during boot or via windows advanced startup, just a black screen appears. It does nothing, when hitting any key.
It's strange. I already installed Fedora on her Laptop and this caused no such issue. However. For the installation of Pop_OS, I had to disable secureboot. Has this something to do with the black screen?
[Edited the thread to add model name to the title]