vgaswitcheroo permission denied

[edohub]

Hello, I am using Fedora28 in dual boot with OSX 10.11.4. I downloaded the latest version available and followed the README.md instructions, then I updated grub. At the reboot fedora loaded the logo of the system and then I got a very creepy blank screen with a "vga switcheroo client 101 refused switch" error. I'm not very skilled in this sort of things, but I suppose that apple_set_os.efi is working, but the system is stuck trying to switch unsuccessfully the VGA. Now I cannot even login fedora. I wonder if it exists a way to fix this from the grub. Thank you

[edohub]

Ok, I managed to fix that myself. I had to switch to integrated gpu from OSX using gfxCardStatus v 2.2.1 (I've read newer versions could have issues). After that I booted on Fedora and I was able to use my integrated gpu. Switching to the dedicated is a bit more tricky cause it's suggested to install proprietary drivers (I installed nvidia, for example) and enable the gpu switching from settings (in my case, I needed prime available in nvidia-settings).
Since I am still a newbie, if there is anyone more experienced who has to point out something about this topic, feel free to comment.

[edohub]

If you have fedora on single boot on your mac, try installing gpu-switch (I think it's by the same developer of apple_set_os_efi) and change your gpu using chroot from a live-usb session (after having mounted your linux partition, obviously). You can also try:

• From a live-usb session mount EFI partition and delete apple_set_os_efi
• Boot linux (Now it should be able to start)
• Download gpu-switch
• Type on a terminal sudo PathToGpuSwitch/ and then ./gpu-switch -i
• Mount your EFI partition and add to a custom directory apple_set_os_efi
• Reboot