Starting immediately after kernel version 3.10.4 I began to have problems with the display on my laptop. When booting in UEFI mode the laptop screen would go blank as soon as GRUB2 loaded the initramfs image. The screen hooked up to the DisplayPort connection, on the other hand, would display just fine. If I boot an image off of a USB in BIOS mode everything works just fine.
To make a long story short, I added the rpmfusion repos so that I could install the nvidia drivers and downloaded whatever updates appeared. Initially after rebooting, I kept getting "No root device found" which I've managed to solve but now it keeps locking up after "Starting atd".
I have a z77 Asrock Extreme 4 board with the latest uefi firmware (2.90). I can't boot into uefi mode from the official Slackware64 dvd. When I select the cdrom/uefi entry from the uefi boot menu it goes to a blank screen with the text "grub" in the top right corner. It then freezes. The board boots into uefi with a fedora usb.
So since you now have gummiboot in the /boot/EFI/boot/bootx64.efi spot, can you now try to boot that particular device itself (like you would do if you are booting in bios mode), but also make sure that bios emulation is either fully disabled, or UEFI is somehow given priority?Keep in mind that in order for gummiboot to take you to its menu, I am pretty sure you do have to have a minimal configura
Sounds like your video drivers are failing. If you hit Esc when you see the grub boot screen then you can edit the kernel command line parameters and add " 3" (without the quotes) to the ... [by TrevorH]
I just updated my laptop to F20 and it mostly went well except that I can't boot the machine without going in to the "BIOS" menu.
The problem is that when I boot the machine, grub tries to boot Fedora but it hangs at the "Loading initial ramdisk" line and then powers down. This happens not only with the F20 kernel but the F19 kernels as well.