Am 06.03.20 um 15:23 schrieb Jerry Geis:
This is my /proc/cmdline


BOOT_IMAGE=(hd0,gpt2)/boot/vmlinuz-4.18.0-147.5.1.el8_1.x86_64
root=UUID=c1bef884-0180-4955-a669-c99a8c64f75a ro crashkernel=auto
resume=UUID=0fe1a972-9912-4803-b5ec-265a13a888c1 biosdevname=0
net.ifnames=0 rhgb quiet rd.driver.
blacklist=nouveau nomodeset nouveau.modeset=0 acpi_backlight=vendor
"acpi_osi=!Windows 2013" "acpi_osi=!Windows 2012"

Mmmh, are you using a dual graphics platform?

Just a wild guess; substitute your grub config part

blacklist=nouveau nomodeset nouveau.modeset=0

with

module_blacklist=nouveau,amdgpu,radeon i915.alpha_support=1

Install the new grub config and rebuild your
init ramdisk, just for consistency ...

--
Leon


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