After 2 hours trying, I gave up. I tried to install kde in a fedora vm, but can’t start kde. Then I installed kde in a debian vm, but can’t start krdp. I know why you install fedora from ISO now. Due to I can’t reproduce your environment, I can only give you some points to try. I feel sorry about not being able to help you anymore.
First, gl=on is impossible:
Second, you can try this drivers for test:
For example:
name: qemu
description: qemu driver
devices: {}
config:
raw.qemu.conf: |-
[device "qemu_gpu"]
driver = "qxl-vga"
Third, you can try vnc.
Fourth, use another desktop environment.
Fifth, use container. It’s very easy to use gpu. Just change gid to container’s video gid and change gpu’s pci address.
name: hwac
description: hardware acceleration
devices:
mygpu:
gid: '44'
gputype: physical
pci: '0000:00:02.0'
type: gpu