Description of problem:
I've tried booting Fedora with "nomodeset". GNOME failed to load (in BIOS mode, UEFI worked just fine) on one of two tested (bare metal) desktops.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Boot Fedora with nomodeset
After logging in, screen stays with grayish (gdm) background with no content.
GNOME should work with VESA driver.
Created attachment 1413792 [details]
Created attachment 1413793 [details]
I have tested today with the latest build (https://kojipkgs.fedoraproject.org/compose/branched/Fedora-28-20180403.n.0/compose/Everything/x86_64/iso/Fedora-Everything-netinst-x86_64-28-20180403.n.0.iso) and the installation was working on our bare metal. There were some blinking and glitching of the screen, but finally it was able to set up and display everything correctly.
bře 27 16:20:54 localhost.localdomain gnome-shell: Failed to create backend: Could not find a primary drm kms device
bře 27 16:20:55 localhost.localdomain gnome-session: gnome-session-binary: WARNING: App 'org.gnome.Shell.desktop' exited with code 1
This should be fixed in mesa 18.0.0-4.fc28.