Description of problem:

Black background shows in the main screen after login VM from GUI, which looks not beautiful comparing with RHEL 8 and user experience is not good.
 

Version-Release number of selected component (if applicable):

Host: 

Hyper-V 2019
EXSi

Guest: 

RHEL-9.0.0-20210628.4 nightly compose

kernel 5.13.0-0.rc7.51.el9.x86_64
gnome-desktop3-40.1-1.el9.x86_64
gnome-session-40.1.1-1.el9.x86_64
gnome-session-wayland-session-40.1.1-1.el9.x86_64
gnome-session-xsession-40.1.1-1.el9.x86_64
gnome-classic-session-40.2-1.el9.noarch
xorg-x11-xinit-session-1.4.0-10.el9.x86_64

How reproducible:

100%

Steps to Reproduce:

1. Start VM and login in VM from GUI mode.
2. Check the main screen after user login.
3. Switch different session.

Actual results:

2. The black background shows in the main screen, only the “Activities” icon at the top, makes the UI look not beautiful.
3. Different session selection screens are also black.


Expected results:

2. There is another background with a different color with "Red Hat Enterprise 9" flag but not a totally black screen. 
3. Session selection screen is not black.


Additional information:

Please check the attachment to compare RHEL 9 main screen with RHEL 8.