I have met the similar issue. This problem happen after upgrade today. When i reboot after upgrade, i found the login screen is broken, there are a lot of color stripes, but i still can input the password and login. After login, the screen beccome to normal.
mhwd -li -d
NAME: video-linux
ATTACHED: PCI
VERSION: 2018.05.04
INFO: Standard open source drivers.
PRIORITY: 2
FREEDRIVER: true
DEPENDS: -
CONFLICTS: -
CLASSIDS: 0300 0380 0302
VENDORIDS: 1002 8086 10de
My video card is HD530 and GTX950M
uname -a
Linux cwg20 5.10.15-1-MANJARO #1 SMP PREEMPT Wed Feb 10 10:42:47 UTC 2021 x86_64 GNU/Linux
Best Regards