Graphics support may be inadequate for newer hardware, but as far as I can tell, your hardware is known to be a redhat certified product and does not seem to be a big problem.
This symptom occurs when the graphical driver does not work normally after installing the GUI or terminal install for gui
In case of net installation, you can select the corresponding GUI installation and it is easier to install.
I prefer to install the GUI from the Terninal after a minimal installation on the Fedora29 server distribution.
First install xorg related programs. Next, select your favorite GUI manager and install it, and install the programs you think you need Gnome or KDE.
# dnf install xorg*
[root@cugar simmon]# dnf grouplist -v hidden | grep desktop
Install the desired GUI : KDE, Gnome, Mate
# dnf install @kde-desktop-environment
# dnf groupinstall "GNOME Desktop Environment"
# dnf install @mate-desktop-environment
Make sure that xorg related programs and VGA supported drivers are need to install
# lspci
You should check the status of the related program, and check things related to xorg, graphic, and GUI.
Please install GUI related Gnome, KDE, Cinamon ... during the graphic setup and check if it works well.
If the problem is not easily solved, and then show me the your system status.
* graphics hardware and chipset information.
This graphic support is supported by nvidia, so please install the GUI after installing the related program. If you have another chipset, please download and install nvidia support driver.
https://www.nvidia.com/download/driverResults.aspx/141847/en-us
