I am trying to install CentOS 7 on a Dell Precision 3640 and am having some driver problems.

I had to use kmod-e1000e from ElReo enable networking on the:
00:1f.6 Ethernet controller [0200]: Intel Corporation Ethernet Connection (11) I219-LM [8086:0d4c]

I still don’t have graphics. When starting Gnome, it shows the graphic screen briefly but reverts to the text login.

It has two graphics cards:
00:02.0 VGA compatible controller [0300]: Intel Corporation Device
[8086:9bc5] (rev 05)
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Lexa XT [Radeon PRO WX 3200] [1002:6981] (rev 10)

lsmod shows i915 and amdgpu modules loaded but Xorg.0.log says the modules amdgpu cannot be found. Is it a version issue?
Dell has a Radeon driver for RHEL 8, but not for 7.

I have no xorg.conf file.

[ 54.839]
X.Org X Server 1.20.4
X Protocol Version 11, Revision 0
[ 54.840] Build Operating System: 3.10.0-957.1.3.el7.x86_64
[ 54.840] Current Operating System: Linux isr3c538b3kenn 3.10.0
1160.25.1.el7.x86_64 #1 SMP Wed Apr 28 21:49:45 UTC 2021 x86_64
[ 54.840] Kernel command line:
BOOT_IMAGE=/vmlinuz-3.10.01160.25.1.el7.x86_64
root=/dev/mapper/CentOS-root ro crashkernel=auto rd.lvm.lv