I own a early 2011 MacBook Pro 15" (macOS Sierra). Some weeks ago, my discrete GPU (AMD Radeon) kinda broke (as soon as the Mac had to calculate something, the screen got distorted). Because of that, I downloaded gfxCardStatus, which let me manually switch to the internal grpahics card (wich works well now).
Now, i want to install Ubuntu Elementary (dual boot) which is not possible with the acutal GPU. Is there any possibility to change the default graphics card in the EFI/BIOS to always boot with the Intel HD chip?