I recently installed rhel 7 on my laptop as dual boot (with windows 8.1) in UEFI mode. After the installation I cannot log into redhat.  The gnome desktop starts to load and then it goes to a black screen with an underscore at top left corner. No key works at this stage except the power button.My laptop is dell inspiron 15r 5537, 4th gen i5, 8gb ram amd graphics card.I had this same screen while trying to install rhel (while booting from dvd in uefi). After some reboots the anaconda installer just started. And I installed rhel server with gui.What is the issue? 
Rhel 7 not booting up
rhel;x11;xorg;gnome